Pixel driving circuit and display device

Abstract

The present invention relates to a pixel driving circuit and display device, comprising a preprocessing module, a driving module, a potential storage module, and a light-emitting control module. The light-emitting control module is configured to receive a voltage input signal and to connect to a light-emitting element. The preprocessing module receives the preprocessing signal and controls the operation of the driving module based on the preprocessing signal. During operation, the driving module receives a voltage compensation signal, which is used to perform voltage compensation on the driving module. The potential storage module stores the potential after the voltage compensation signal is applied to the driving module. After being turned on, the light-emitting control module controls the operation of the light-emitting element based on the potential stored in the potential storage module and the voltage input signal. By providing a voltage compensation signal to compensate the driving module for voltage, the pixel driving circuit and display device can reduce the impact of unstable performance of the driving module on the light-emitting element, thereby improving the quality of the current transmitted to the light-emitting element.

Description

Technical Field

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

[0002] Currently, display screens are widely used in military command, security, and commercial applications due to their vibrant colors, wide dynamic range, high brightness, long lifespan, and stable and reliable operation. Among them, LED (Light Emitting Diode) displays are the most widely used. With the advancement of optical and semiconductor technologies, the spacing between pixels in LED displays has further decreased, and glass-based MiniLED / MicroLED technology has become a research hotspot.

[0003] Glass-based MiniLED / MicroLED technology typically uses thin-film transistors (TFTs) to drive the pixels in LED displays. However, over time, TFTs can age, leading to unstable performance. This in turn causes unstable drive currents to the pixels, sometimes causing the LED display to malfunction. Summary of the Invention

[0004] Based on this, it is necessary to provide a pixel driving circuit and a display device to address the above problems.

[0005] A pixel driving circuit includes a preprocessing module, a driving module, a potential storage module, and a light-emitting control module; the driving module, the potential storage module, and the light-emitting control module are all connected to the preprocessing module, the potential storage module and the light-emitting control module are all connected to the driving module, and the potential storage module is connected to the light-emitting control module; the light-emitting control module is used to receive a voltage input signal and is used to connect to a light-emitting element;

[0006] The preprocessing module receives the preprocessing signal and is used to control the operation of the driving module according to the preprocessing signal;

[0007] When the driving module is working, it receives a voltage compensation signal, and the voltage compensation signal is used to perform voltage compensation on the driving module;

[0008] The potential storage module is used to store the potential after the voltage compensation signal is used to compensate the driving module for voltage;

[0009] After being turned on, the light-emitting control module controls the operation of the light-emitting element according to the potential stored in the potential storage module and the voltage input signal.

[0010] In one embodiment, the driving module includes a compensation unit and a driving unit, the driving unit and the potential storage module are both connected to the compensation unit, and the potential storage module, the pre-processing module and the light emitting control module are all connected to the driving unit;

[0011] When the compensation unit is working, it receives the voltage compensation signal and transmits it to the driving unit.

[0012] In one embodiment, the driving unit includes a first switching tube and a second switching tube;

[0013] The potential storage module, the preprocessing module, and the compensation unit are all connected to the control end of the first switching tube, the first end of the second switching tube and the compensation unit are both connected to the first end of the first switching tube, the compensation unit and the light control module are both connected to the second end of the first switching tube, and the control end of the first switching tube is used to receive the voltage compensation signal;

[0014] The potential storage module, the preprocessing module and the compensation unit are all connected to the control end of the second switching tube, the light control module is connected to the first end of the second switching tube, the compensation unit and the light control module are both connected to the second end of the second switching tube, and the control end of the second switching tube is used to receive the voltage compensation signal.

[0015] In one embodiment, the compensation unit is used to receive a working control signal, and the working control signal is used to control whether the compensation unit is working.

[0016] In one embodiment, the compensation unit includes a third switch tube, a fourth switch tube, and a fifth switch tube; the control end of the third switch tube, the control end of the fourth switch tube, and the control end of the fifth switch tube are all used to receive the working control signal;

[0017] The first end of the third switch tube is used to receive the voltage compensation signal, and the first end of the first switch tube and the first end of the second switch tube are both connected to the second end of the third switch tube;

[0018] The second end of the first switch tube, the second end of the fifth switch tube and the light control module are all connected to the first end of the fourth switch tube, and the preprocessing module and the potential storage module are both connected to the second end of the fourth switch tube;

[0019] The second end of the second switch tube and the light control module are both connected to the first end of the fifth switch tube, and the second end of the fifth switch tube is connected to the control end of the second switch tube.

[0020] In one embodiment, the working control signal includes a first working control signal and a second working control signal, and the compensation unit also includes a sixth switch tube, the first end of the sixth switch tube is used to access the voltage compensation signal, the first end of the second switch tube and the light control module are both connected to the second end of the sixth switch tube, the control end of the sixth switch tube and the control end of the fifth switch tube are both used to access the second working control signal, and the control end of the third switch tube and the control end of the fourth switch tube are both used to access the first working control signal.

[0021] In one embodiment, the pre-processing module is further configured to receive an initialization signal and transmit it to the light-emitting element, where the initialization signal is configured to remove the residual potential of the light-emitting element.

[0022] In one embodiment, the preprocessing module includes a first preprocessing unit and a second preprocessing unit, the first preprocessing unit is connected to the second preprocessing unit and connected to the driving module, and the second preprocessing unit is used to connect to the light-emitting element;

[0023] The first preprocessing unit is used to access the preprocessing signal and the initialization signal, and the second preprocessing unit is used to access the preprocessing signal and the initialization signal.

[0024] In one embodiment, the first pre-processing unit includes a seventh switching transistor and an eighth switching transistor, and the second pre-processing unit includes a ninth switching transistor;

[0025] The first end of the seventh switch tube and the first end of the eighth switch tube are both connected to the driving module, the second end of the seventh switch tube and the second end of the eighth switch tube are both connected to the second end of the ninth switch tube, and the first end of the ninth switch tube is used to connect to the light-emitting element;

[0026] The control end of the seventh switch tube and the control end of the eighth switch tube are both used to access the preprocessing signal, the second end of the seventh switch tube and the second end of the eighth switch tube are both used to access the initialization signal, the control end of the ninth switch tube is used to access the preprocessing signal, and the second end of the ninth switch tube is used to access the initialization signal.

[0027] In one embodiment, the potential storage module includes a first storage capacitor and a second storage capacitor, the first end of the first storage capacitor and the first end of the second storage capacitor are both connected to the driving module, and the second end of the first storage capacitor and the second end of the second storage capacitor are both connected to the light control module.

[0028] In one embodiment, the light-emitting control module includes a tenth switch tube and an eleventh switch tube, the first end of the tenth switch tube is connected to the storage module and is used to receive a voltage input signal, the second end of the tenth switch tube and the first end of the eleventh switch tube are both connected to the driving module, the second end of the eleventh switch tube is used to connect to the light-emitting element, and the control ends of the tenth switch tube and the eleventh switch tube are both used to receive a light-emitting control signal.

[0029] A display device comprises a light-emitting element and the pixel driving circuit described in any one of the above embodiments.

[0030] The above-mentioned pixel driving circuit and display device include a preprocessing module, a driving module, a potential storage module, and a light-emitting control module. The driving module, potential storage module, and light-emitting control module are all connected to the preprocessing module, the potential storage module and light-emitting control module are all connected to the driving module, and the storage module is connected to the light-emitting control module. The light-emitting control module is used to receive a voltage input signal and is used to connect to the light-emitting element. The preprocessing module receives a preprocessing signal and controls the operation of the driving module according to the preprocessing signal. When the driving module is in operation, it receives a voltage compensation signal, which is used to perform voltage compensation on the driving module. The potential storage module stores the potential after the voltage compensation signal is applied to the driving module. After the light-emitting control module is turned on, it controls the operation of the light-emitting element according to the potential stored in the potential storage module and the voltage input signal. By providing a voltage compensation signal to compensate the driving module for voltage, the pixel driving circuit and display device can reduce the impact of the unstable performance of the driving module on the light-emitting element, thereby improving the quality of the current transmitted to the light-emitting element and further ensuring the normal operation of the light-emitting element. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 is a schematic structural block diagram of a pixel driving circuit in one embodiment;

[0033] Figure 2 is a schematic structural block diagram of a pixel driving circuit in another embodiment;

[0034] Figure 3 is a structural schematic diagram of a pixel driving circuit in one embodiment;

[0035] Figure 4 is a structural diagram of a pixel driving circuit in yet another embodiment;

[0036] Figure 5 1 is a control timing diagram of a pixel driving circuit in one embodiment;

[0037] Figure 6 FIG. 1 is a control timing diagram of a pixel driving circuit in another embodiment. DETAILED DESCRIPTION

[0038] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0040] It will be understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor without departing from the scope of this application. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0041] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0042] As used herein, the singular forms "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include," "comprising," "having," and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Furthermore, the term "and / or" as used in this specification includes any and all combinations of the relevant listed items.

[0043] In one embodiment, Figure 1 As shown, a pixel driving circuit is provided, including a preprocessing module 110, a driving module 120, a potential storage module 130 and a light-emitting control module 140. The driving module 120, the potential storage module 130 and the light-emitting control module 140 are all connected to the preprocessing module 110, the potential storage module 130 and the light-emitting control module 140 are all connected to the driving module 120, and the potential storage module 130 is connected to the light-emitting control module 140; the light-emitting control module 140 is used to access a voltage input signal and to connect a light-emitting element.

[0044] The preprocessing module 110 can receive a preprocessing signal and control the operation of the driving module 120 based on the preprocessing signal. For example, when the driving module 120 includes a switch, the preprocessing signal can be a high or low level signal. The preprocessing module 110 controls the on and off of the switch by transmitting the high or low level signal to the switch, thereby controlling the operating state of the driving module 120.

[0045] The driving module 120 is mainly used to drive the light-emitting element, and the driving mode can be current driving. The specific steps of the current driving mode include: the driving module 120 generates a constant current that can enable the light-emitting element to operate normally, and transmits it to the light-emitting element through the light control module 140 to drive the light-emitting element to operate normally. In addition, the driving module 120 may include multiple driving units 122, each of which can generate a constant current to drive the light-emitting element, thereby improving the driving capability of the driving module 120. For example, when the driving module 120 includes multiple driving switch tubes, each driving switch tube has a current amplification function, and the current amplified by each driving switch tube is transmitted to the light-emitting element together, which can further improve the driving capability of the driving module 120.

[0046] Furthermore, when operating, the driver module 120 can receive a voltage compensation signal, which is used to perform voltage compensation on the driver module 120. It will be appreciated that when the driver module 120 includes multiple driver switches, the operating voltage of the driver switches must be greater than or equal to a threshold voltage in order for the driver switches to generate an output current. Therefore, after the driver module 120 receives the voltage compensation signal, the voltage compensation signal can compensate for the threshold voltage of the driver switches, thereby stabilizing the drive current transmitted from the driver module 120 to the light-emitting element via the light-emitting control module 140, thereby ensuring the normal operation of the light-emitting element.

[0047] The potential storage module 130 is used to store the potential after the voltage compensation signal is applied to the driver module 120. Specifically, the driver module 120 may include multiple driver units 122. When each driver unit 122 receives the voltage compensation signal to compensate for the voltage, the required voltage compensation may also be different due to the different types of driver units 122. Therefore, the voltage compensation signal can be selected as the larger voltage value among the voltage values required to be compensated for each driver unit 122. The potential of each driver unit 122 after voltage compensation can be stored in the potential storage module 130. This ensures that the potential of each driver unit 122 after voltage compensation remains consistent, and each voltage value is the larger voltage value among the voltage values required to be compensated. This can generate a larger current and improve the driving capability of the driver module 120. Alternatively, the voltage compensation signal can be used to perform voltage compensation for each driver unit 122 in the driver module 120 separately, and different voltage compensation signals can be input according to the actual situation of each driver unit 122. Correspondingly, the potential storage module 130 may also include several potential storage units, and the voltage value of each driving unit 122 after voltage compensation may be stored in each potential storage unit, so that each driving unit 122 is independent of each other, reducing interference.

[0048] The light control module 140 can be turned on based on the received light control signal. Specifically, when the light control module 140 is turned on, it can control the operation of the light-emitting element based on the potential and voltage input signal stored in the potential storage module 130. Specifically, when the light control module 140 is turned on, it can transmit current to the light-emitting element to drive the light-emitting element.

[0049] In this embodiment, the pixel driving circuit includes a preprocessing module 110, a driving module 120, a potential storage module 130, and a light-emitting control module 140. The driving module 120, the potential storage module 130, and the light-emitting control module 140 are all connected to the preprocessing module 110. The potential storage module 130 and the light-emitting control module 140 are all connected to the driving module 120. The storage module is connected to the light-emitting control module 140. The light-emitting control module 140 is used to receive a voltage input signal and is used to connect to a light-emitting element. Among them, the preprocessing module 110 receives a preprocessing signal and controls the operation of the driving module 120 according to the preprocessing signal. When the driving module 120 is in operation, it receives a voltage compensation signal, which is used to perform voltage compensation on the driving module 120. The potential storage module 130 stores the potential after the voltage compensation signal is applied to the driving module 120. After the light-emitting control module 140 is turned on, it controls the operation of the light-emitting element according to the potential stored in the potential storage module 130 and the voltage input signal. The pixel driving circuit and display device can perform voltage compensation on the driving module 120 by setting a voltage compensation signal, thereby reducing the impact of the driving module's own unstable performance on the light-emitting element, thereby improving the quality of the current transmitted to the light-emitting element and further ensuring the normal operation of the light-emitting element.

[0050] In one embodiment, Figure 2 As shown, the driving module 120 includes a compensation unit 121 and a driving unit 122. The driving unit 122 and the potential storage module 130 are both connected to the compensation unit 121. The potential storage module 130, the preprocessing module 110 and the light-emitting control module 140 are all connected to the driving unit 122. When the compensation unit 121 is working, it receives the voltage compensation signal and transmits it to the driving unit 122.

[0051] Optionally, after receiving the voltage compensation signal, the compensation unit 121 can directly transmit the voltage compensation signal to the driving unit 122 for compensating the voltage of the driving unit 122. The compensation unit 121 can also pre-process the voltage compensation signal after receiving the voltage compensation signal, and then transmit the processed voltage compensation signal to the driving unit 122 to improve the stability of signal transmission and ensure the normal operation of the driving unit 122. For example, the compensation unit can stabilize the voltage compensation signal so that the voltage compensation signal is stably transmitted to the driving unit 122. The compensation unit can also filter the voltage compensation signal to reduce noise in the voltage compensation signal, thereby improving the quality of the voltage compensation signal transmitted to the driving unit 122.

[0052] Specifically, when operating, the compensation unit 121 receives a voltage compensation signal and transmits it to the driving unit 122 to perform voltage compensation on the driving unit 122. The potential of the driving unit 122 after voltage compensation by the voltage compensation signal can also be transmitted to the potential storage module 130 via the compensation unit 121 for storage. The potential stored in the potential storage module 130 can be transmitted to the driving unit 122, so that the potential of the driving unit 122 is the same as the potential stored in the potential storage module 130. Based on the voltage input signal and the potential of the driving unit 122, the light-emitting element can be driven to emit light via the conductive light-emitting control module 140.

[0053] In this embodiment, the driver module 120 of the pixel driver circuit includes a compensation unit 121 and a driver unit 122. The driver unit 122 and the potential storage module 130 are both connected to the compensation unit 121. The potential storage module 130, the pre-processing module, and the light control module 140 are all connected to the driver unit 122. When operating, the compensation unit 121 receives a voltage compensation signal and transmits the voltage compensation signal to the driver unit 122. This can compensate the voltage of the driver unit 122, reducing the impact of the driver unit's own unstable performance on the light-emitting element, thereby improving the quality of the current transmitted to the light-emitting element and further ensuring the normal operation of the light-emitting element.

[0054] In one embodiment, Figure 3 As shown, the driving unit 122 includes a first switching tube T1 and a second switching tube T2.

[0055] The potential storage module 130, the pre-processing module 110, and the compensation unit 121 are all connected to the control terminal of the first switching transistor T1. The first terminal of the second switching transistor T2 and the compensation unit 121 are all connected to the first terminal of the first switching transistor T1. The compensation unit 121 and the light control module 140 are all connected to the second terminal of the first switching transistor T1. The control terminal of the first switching transistor T1 is used to receive the voltage compensation signal. The potential storage module 130, the pre-processing module 110, and the compensation unit 121 are all connected to the control terminal of the second switching transistor T2. The light control module 140 is connected to the first terminal of the second switching transistor T2. The compensation unit 121 and the light control module 140 are all connected to the second terminal of the second switching transistor T2. The control terminal of the second switching transistor T2 is used to receive the voltage compensation signal.

[0056] The control terminal of the switch tube can be used for signal transmission and controlling the on / off state of the switch tube, and the first terminal and the second terminal of the switch tube can be used for receiving or sending signals. For example, when the switch tube is a transistor, the control terminal of the switch tube can be the gate of the transistor, and the first terminal and the second terminal of the switch tube can be the source and drain of the transistor, respectively.

[0057] Specifically, the preprocessing module 110 transmits the preprocessed signal to the control terminals of the first and second switching transistors T1 and T2, thereby turning on the first and second switching transistors T1 and T2. During operation, the compensation unit 121 receives the voltage compensation signal and transmits the voltage compensation signal to the control terminals of the first and second switching transistors T1 and T2, thereby performing voltage compensation on the control terminals of the first and second switching transistors T1 and T2.

[0058] When both the first switch transistor T1 and the second switch transistor T2 are transistors, the control terminals of the first switch transistor T1 and the second switch transistor T2 may be gates, the first terminals of the first switch transistor T1 and the second switch transistor T2 may be sources, and the second terminals of the first switch transistor T1 and the second switch transistor T2 may be drains. Furthermore, the currents of the first switch transistor T1 and the second switch transistor T2 can be calculated using the following formula:

[0059] I=K(V gs -V th ) 2 (1)

[0060] Among them, I is the current of the switch tube, K is the mobility of the switch tube, V gs is the gate-source voltage of the switch tube, V th is the threshold voltage of the switch tube. V gs According to the source potential V S and gate potential V g Calculated.

[0061] After the voltage compensation signal performs voltage compensation on the first switch tube T1 and the second switch tube T2, the gate potential V g1 Can be V th1 +V data , the gate potential of the second switch tube T2 is V g2 Can be V th2 +V data , V th1 It is represented by the threshold voltage of the first switch tube T1, V th2 It is represented by the threshold voltage of the second switch tube T2, V data Represents the voltage value of the voltage compensation signal. According to formula (1), the current I1 of the first switch tube T1 = K(V th1 +V data -V S -V th1 ) 2 =K(V data -V S ) 2 Similarly, the current I2 of the second switch tube T2 = K(V data -V S )2 It can be seen that the voltage compensation signal can effectively compensate for the threshold voltages of the first switch tube T1 and the second switch tube T2, so that the current transmitted to the light-emitting element through the light-emitting control module 140 is not affected by the threshold voltages of the first switch tube T1 and the second switch tube T2, thereby improving the quality of the current transmitted to the light-emitting element.

[0062] In this embodiment, the driving unit 122 of the pixel driving circuit includes a first switching transistor T1 and a second switching transistor T2. By using switching transistors for signal transmission, the reliability and stability of signal transmission can be improved, thereby improving the quality of the current transmitted to the light-emitting element and further ensuring the normal operation of the light-emitting element.

[0063] In one embodiment, Figure 3 As shown, the compensation unit 121 is used to access a working control signal, and the working control signal is used to control whether the compensation unit 121 is working.

[0064] The operation control signal may be a high-level or low-level signal, wherein the high-level signal is used to control the compensation unit 121 to not operate, and the low-level signal is used to control the compensation unit 121 to operate. For example, when the compensation unit 121 includes a switch tube, the low-level signal controls the switch tube to be turned on, so that the switch tube is in an operating state; and the high-level signal controls the switch tube to be turned off, so that the switch tube is not in operation.

[0065] Specifically, after the compensation unit 121 receives the operation control signal, if the operation control signal controls the compensation unit 121 to operate, the compensation unit 121 transmits the voltage compensation signal to the driving unit 122, and the voltage compensation signal performs voltage compensation on the driving unit 122. If the operation control signal controls the compensation unit 121 not to operate, the voltage compensation signal does not perform voltage compensation on the driving unit 122.

[0066] In this embodiment, the compensation unit 121 of the pixel driving circuit controls whether the compensation unit 121 is working by accessing the working control signal, which can improve the working independence of the compensation unit 121, thereby reducing interference with other working units or working modules and ensuring the normal operation of the pixel driving circuit.

[0067] In one embodiment, Figure 3 As shown, the compensation unit 121 includes a third switch tube T3, a fourth switch tube T4 and a fifth switch tube T5.

[0068] The control end of the third switch tube T3, the control end of the fourth switch tube T4, and the control end of the fifth switch tube T5 are all used to receive the working control signal; the first end of the third switch tube T3 is used to receive the voltage compensation signal, and the first end of the first switch tube T1 and the first end of the second switch tube T2 are both connected to the second end of the third switch tube T3; the second end of the first switch tube T1, the second end of the fifth switch tube T5, and the light control module 140 are all connected to the first end of the fourth switch tube T4, and the preprocessing module 110 and the potential storage module 130 are both connected to the second end of the fourth switch tube T4; the second end of the second switch tube T2 and the light control module 140 are both connected to the first end of the fifth switch tube T5, and the second end of the fifth switch tube T5 is connected to the control end of the second switch tube T2.

[0069] Specifically, the operating control signal is transmitted to the control terminals of the third, fourth, and fifth switching transistors T3, T4, and T5, thereby controlling the third, fourth, and fifth switching transistors T3, T4, and T5 to turn on. The third switching transistor T3 transmits a voltage compensation signal to the first terminal of the first switching transistor T1 and the first terminal of the second switching transistor T2. The second terminal of the first switching transistor T1 then transmits the voltage compensation signal to the first terminal of the fourth switching transistor T4, and the second terminal of the fourth switching transistor T4 transmits the voltage compensation signal to the control terminal of the first switching transistor T1 to compensate for the voltage at the control terminal of the first switching transistor T1. The second terminal of the second switching transistor T2 transmits the voltage compensation signal to the first terminal of the fifth switching transistor T5, and the second terminal of the fifth switching transistor T5 transmits the voltage compensation signal to the control terminal of the second switching transistor T2 to compensate for the voltage at the control terminal of the second switching transistor T2.

[0070] In this embodiment, the compensation unit 121 of the pixel driver circuit includes a third switch transistor T3, a fourth switch transistor T4, and a fifth switch transistor T5. The control terminals of the third, fourth, and fifth switches T3, T4, and T5 are all used to receive operating control signals. Therefore, the operation of the compensation unit 121 can be controlled by controlling whether the third, fourth, and fifth switches T3, T4, and T5 are turned on, thereby transmitting the voltage compensation signal to the driver unit 122. Furthermore, by using switches for signal transmission, the stability of signal transmission can be improved, thereby ensuring the normal operation of the pixel driver circuit.

[0071] In one embodiment, Figure 4As shown, the working control signal includes a first working control signal and a second working control signal, and the compensation unit 121 further includes a sixth switch tube T6. The first end of the sixth switch tube T6 is used to access the voltage compensation signal. The first end of the second switch tube T2 and the light control module 140 are both connected to the second end of the sixth switch tube T6. The control end of the sixth switch tube T6 and the control end of the fifth switch tube T5 are both used to access the second working control signal. The control end of the third switch tube T3 and the control end of the fourth switch tube T4 are both used to access the first working control signal.

[0072] The operating control signal can be used to control whether the switches in the compensation unit 121 are turned on. Specifically, the operating control signal can be a high or low level signal. When the first operating control signal is a low level signal, the third and fourth switches T3 and T4 can be turned on. When the second operating control signal is a low level signal, the fifth and sixth switches T5 and T6 can be turned on. It will be understood that when the first and / or second operating control signals are high, the corresponding switches are in the off state and are not operational. In particular, when the fifth and sixth switches T5 and T6 are turned on, the first terminal of the sixth switch T6 receives the voltage compensation signal, and the second terminal of the sixth switch T6 transmits the voltage compensation signal to the first terminal of the second switch T2. Since the second terminal of the second switch T2 is connected to the first terminal of the fifth switch T5, and the second terminal of the fifth switch T5 is connected to the control terminal of the second switch T2, the voltage compensation signal can be transmitted to the control terminal of the second switch T2 via the fifth switch T5 to compensate for the voltage at the control terminal of the second switch T2.

[0073] In addition, voltage compensation for the first switch tube T1 and / or the second switch tube T2 can be achieved by controlling the operating state of the switch tube in the compensation unit 121. For example, when voltage compensation is required for the first switch tube T1, the first operating control signal can be set to a low level to control the third switch tube T3 and the fourth switch tube T4 to be turned on. At this time, the control end of the first switch tube T1 can receive the voltage compensation signal and generate an output current to drive the light-emitting element to work. When voltage compensation is required for the second switch tube T2, the second operating control signal can be set to a low level to control the fifth switch tube T5 and the sixth switch tube T6 to be turned on. At this time, the control end of the second switch tube T2 can receive the voltage compensation signal and generate an output current to drive the light-emitting element to work. Furthermore, different voltage compensation signals can be written according to the threshold voltages of the first switch tube T1 and the second switch tube T2 to perform voltage compensation on the first switch tube T1 and the second switch tube T2, respectively, to ensure the normal operation of the first switch tube T1 and the second switch tube T2.

[0074] It is understandable that technicians in this field can also control the conduction of different switching tubes in the compensation unit 121 according to actual needs to make the driving unit 122 corresponding to the turned-on switching tube work, thereby adjusting the driving capability of the pixel driving circuit and increasing the application range of the pixel driving circuit.

[0075] In this embodiment, the operating control signal includes a first operating control signal and a second operating control signal, and the compensation unit 121 further includes a sixth switch T6. The first operating control signal and the second operating control signal respectively control the conduction of different switches in the compensation unit 121, thereby enabling the first switch T1 and the second switch T2 in the driving unit 122 to operate independently or in conjunction, thereby controlling the driving capability of the pixel driving circuit and expanding the application range of the pixel driving circuit.

[0076] In one embodiment, Figure 3 As shown, the pre-processing module 110 is further used to access an initialization signal and transmit it to the light-emitting element. The initialization signal is used to remove the residual potential of the light-emitting element.

[0077] Specifically, the initialization signal can be a low-voltage signal. The preprocessing module 110 transmits the low-voltage signal to the light-emitting element. At this time, there is a potential difference between the two ends of the light-emitting element, and the residual potential in the light-emitting element is released in the form of current, thereby achieving the purpose of removing the residual potential of the light-emitting element.

[0078] In this embodiment, by connecting the initialization signal to the pre-processing module 110, and then the pre-processing module 110 transmits the initialization signal to the light-emitting element, the residual potential of the light-emitting element can be removed to ensure the normal operation of the light-emitting element.

[0079] In addition, the initialization signal in this embodiment can also act on the driver module 120 together with the above-mentioned preprocessing signal. For example, when the preprocessing module 110 includes a switch tube, the preprocessing signal can first control the switch tube in the preprocessing module 110 to turn on, and the initialization signal is then transmitted through the switch tube in the preprocessing module 110 to reach the driver module 120. The driver module 120 then adjusts its operating mode according to the initialization signal, such as to an operating state or a non-operating state.

[0080] In one embodiment, Figure 2 As shown, the pre-processing module 110 includes a first pre-processing unit 111 and a second pre-processing unit 112. The first pre-processing unit 111 is connected to the second pre-processing unit 112 and the driving module 120. The second pre-processing unit 112 is used to connect to the light-emitting element. The first pre-processing unit 111 is used to receive the pre-processing signal and the initialization signal, and the second pre-processing unit 112 is used to receive the pre-processing signal and the initialization signal.

[0081] The first preprocessing unit 111 and the second preprocessing unit 112 can be in different operating modes corresponding to different preprocessing signals, such as in an operating state or a non-operating state. When the first preprocessing unit 111 is in an operating state, an initialization signal can be transmitted to the driver module 120 and the second preprocessing unit 112. The initialization signal can be used to initialize the driver module 120. For example, when the driver module 120 includes a switching tube, the initialization signal can be used to turn on the switching tube so that the voltage compensation signal can be transmitted to the switching tube. The initialization signal can also be used to initialize the light-emitting element, for example, to remove the residual potential in the light-emitting element to ensure normal operation of the light-emitting element.

[0082] In this embodiment, the preprocessing module 110 of the pixel driver circuit includes a first preprocessing unit 111 and a second preprocessing unit 112. The first preprocessing unit 111 is connected to the second preprocessing unit 112 and to the driver module 120. The second preprocessing unit 112 is used to connect to the light-emitting element. The first preprocessing unit 111 and the second preprocessing unit 112 are both used to receive preprocessing signals and initialization signals. Preprocessing the driver module 120 by the first preprocessing unit 111 and initializing the light-emitting element by the second preprocessing unit 112 facilitate signal transmission and ensure the normal operation of the pixel driver circuit.

[0083] In one embodiment, Figure 3 As shown, the first pre-processing unit 111 includes a seventh switch transistor T7 and an eighth switch transistor T8, and the second pre-processing unit 112 includes a ninth switch transistor T9. The first end of the seventh switch transistor T7 and the first end of the eighth switch transistor T8 are both connected to the driver module 120, the second end of the seventh switch transistor T7 and the second end of the eighth switch transistor T8 are both connected to the second end of the ninth switch transistor T9, and the first end of the ninth switch transistor T9 is used to connect to the light-emitting element. The control end of the seventh switch transistor T7 and the control end of the eighth switch transistor T8 are both used to receive a pre-processing signal, the second end of the seventh switch transistor T7 and the second end of the eighth switch transistor T8 are both used to receive an initialization signal, the control end of the ninth switch transistor T9 is used to receive a pre-processing signal, and the second end of the ninth switch transistor T9 is used to receive an initialization signal.

[0084] Specifically, when the preprocessing signal is a low-level signal, the seventh switch transistor T7, the eighth switch transistor T8, and the ninth switch transistor T9 can all be turned on. At this time, the initialization signal is transmitted to the driver module 120 via the seventh switch transistor T7 and the eighth switch transistor T8. After the initialization signal initializes the driver module 120, the driver module 120 can receive the voltage compensation signal. In addition, the initialization signal can be a low-level signal, thereby releasing the residual potential in the light-emitting element by lowering the potential of the second terminal of the ninth switch transistor T9.

[0085] In this embodiment, the first preprocessing unit 111 includes a seventh switching transistor T7 and an eighth switching transistor T8, and the second preprocessing unit 112 includes a ninth switching transistor T9. The control terminals of the seventh switching transistor T7 and the eighth switching transistor T8 are both used to receive a preprocessing signal, while the second terminals of the seventh switching transistor T7 and the eighth switching transistor T8 are both used to receive an initialization signal. The control terminal of the ninth switching transistor T9 is used to receive a preprocessing signal, while the second terminal of the ninth switching transistor T9 is used to receive an initialization signal. By using switching transistors for signal transmission, the stability of signal transmission can be guaranteed, thereby improving the reliability of the pixel driving circuit.

[0086] In one embodiment, Figure 3 As shown, the potential storage module 130 includes a first storage capacitor C1 and a second storage capacitor C2, the first end of the first storage capacitor C1 and the first end of the second storage capacitor C2 are both connected to the driving module 120, and the second end of the first storage capacitor C1 and the second end of the second storage capacitor C2 are both connected to the light control module 140.

[0087] Among them, the first storage capacitor C1 and the second storage capacitor C2 can store the potential after the voltage compensation signal is used to compensate the driving module 120. For example, when the driving module 120 includes a first switch tube T1 and a second switch tube T2, the first end of the first storage capacitor C1 can be connected to the control end of the first switch tube T1, and the first end of the second storage capacitor C2 can be connected to the control end of the second switch tube T2. When the control end of the first switch tube T1 receives the voltage compensation signal, the voltage at the control end of the first switch tube T1 continues to rise, and at the same time, the first storage capacitor C1 is also charged. Similarly, when the control end of the second switch tube T2 receives the voltage compensation signal, the voltage at the control end of the second switch tube T2 continues to rise, and at the same time, the second storage capacitor C2 is also charged.

[0088] Optionally, if the control terminal of the first switch tube T1 is connected to the control terminal of the second switch tube T2, when the voltage at the control terminal of the first switch tube T1 reaches a preset threshold, the first switch tube T1 is turned off. The preset threshold can be the sum of the threshold voltage of the first switch tube T1 and the voltage compensation signal. At this time, the voltage compensation signal can continue to charge the first storage capacitor C1 until the second switch tube T2 is also turned off. After the voltage compensation is completed, the voltage values stored in the first storage capacitor C1 and the second storage capacitor C2 are the same, which is the sum of the larger value of the threshold voltage of the first switch tube T1 and the threshold voltage of the second switch tube T2 and the voltage compensation signal.

[0089] If the control end of the first switch tube T1 is not connected to the control end of the second switch tube T2, the voltage value stored in the first storage capacitor C1 may be the sum of the threshold voltage of the first switch tube T1 and the voltage compensation signal, and the voltage value stored in the second storage capacitor C2 may be the sum of the threshold voltage of the second switch tube T2 and the voltage compensation signal.

[0090] After the voltage compensation signal performs voltage compensation on the driving module 120, the voltage stored in the first storage capacitor C1 and the second storage capacitor C2 can be transmitted to the driving module 120. Then, the light control module 140 controls the operation of the light-emitting element according to the voltage input signal and the voltage of the driving module 120.

[0091] In this embodiment, the potential storage module 130 includes a first storage capacitor C1 and a second storage capacitor C2. The first end of the first storage capacitor C1 and the first end of the second storage capacitor C2 are both connected to the driver module 120, and the second end of the first storage capacitor C1 and the second end of the second storage capacitor C2 are both connected to the light control module 140. By using the first storage capacitor C1 and the second storage capacitor C2 to store voltage and then transmitting the stored voltage to the driver module 120, the stability of voltage transmission can be guaranteed, thereby achieving voltage compensation for the driver module 120.

[0092] In one embodiment, Figure 3 As shown, the light-emitting control module 140 includes a tenth switch tube T10 and an eleventh switch tube T11. The first end of the tenth switch tube T10 is connected to the storage module and is used to receive a voltage input signal. The second end of the tenth switch tube T10 and the first end of the eleventh switch tube T11 are both connected to the driving module 120. The second end of the eleventh switch tube T11 is used to connect to the light-emitting element. The control ends of the tenth switch tube T10 and the eleventh switch tube T11 are both used to receive a light-emitting control signal.

[0093] Specifically, when the light-emission control signal is at a low level, the tenth and eleventh switching transistors T10 and T11 are turned on. The potential storage module 130 transmits the stored voltage to the driver module 120. The driver module 120 and the light-emission control module 140 control the light-emitting element to emit light based on the voltage input signal and the stored voltage value. When the light-emission control signal is at a high level, neither the tenth nor the eleventh switching transistors T10 and T11 are turned on, and the light-emitting element does not emit light.

[0094] In this embodiment, by providing the tenth switch tube T10 and the eleventh switch tube T11 to connect the light emitting element, the voltage input signal and the driving module 120, the operation of the light emitting element can be better controlled and the reliability of the pixel driving circuit can be improved.

[0095] In one embodiment, a display device is provided, comprising a light-emitting element and the pixel driving circuit according to any one of the above embodiments.

[0096] Alternatively, the pixel driving circuit in any of the above embodiments may be a light-emitting submodule, each of which can drive a single light-emitting element. A display device may include any number of light-emitting submodules to drive any number of light-emitting elements. Furthermore, depending on the actual situation, different control signals may be set to control the operation of a single or multiple light-emitting submodules to drive the light-emitting elements.

[0097] For ease of understanding, a more detailed specific embodiment is provided below.

[0098] In one embodiment, Figure 3 As shown, a pixel driving circuit is provided, including a pre-processing module 110, a driving module 120, a potential storage module 130, and a light-emitting control module 140. The pre-processing module 110 includes a first pre-processing unit 111 and a second pre-processing unit 112; the driving module 120 includes a driving unit 122 and a compensation unit 121; and the potential storage module 130 includes a first storage capacitor C1 and a second storage capacitor C2. The driving unit 122 includes a first switching transistor T1 and a second switching transistor T2; the compensation unit 121 includes a third switching transistor T3, a fourth switching transistor T4, and a fifth switching transistor T5; the first pre-processing unit 111 includes a seventh switching transistor T7 and an eighth switching transistor T8; the second pre-processing unit 112 includes a ninth switching transistor T9; and the light-emitting control module 140 includes a tenth switching transistor T10 and an eleventh switching transistor T11. Among them, the light-emitting element is a light-emitting diode; the voltage input signal is a forward voltage input signal ELVDD; the working control signal includes a first working control signal and a second working control signal; the type of the switching tube can be a P-type thin film transistor, therefore, the control end of the switching tube can be a gate, the first end of the switching tube can be a source, and the second end of the switching tube can be a drain.

[0099] The first end of the first storage capacitor C1, the drain of the fourth switch T4, and the source of the seventh switch T7 are all connected to the gate of the first switch T1; the drain of the third switch T3 and the source of the second switch T2 are all connected to the source of the first switch T1; the source of the fourth switch T4, the gate of the second switch T2, and the source of the eleventh switch T11 are all connected to the drain of the first switch T1. The drain of the fifth switch T5, the first end of the second storage capacitor C2, and the source of the eighth switch T8 are all connected to the gate of the second switch T2; the drain of the tenth switch T10 is connected to the source of the second switch T2; and the source of the fifth switch T5 and the source of the eleventh switch T11 are both connected to the drain of the second switch T2.

[0100] The source of the third switch transistor T3 is connected to the voltage compensation signal, and the gates of the third, fourth, and fifth switch transistors T3, T4, and T5 are connected to the operation control signal. The second end of the first storage capacitor C1 and the second end of the second storage capacitor C2 are connected to the positive voltage input signal ELVDD. The gates of the seventh, eighth, and ninth switch transistors T7, T8, and T9 are connected to the preprocessing signal. The drains of the seventh, eighth, and ninth switch transistors T7, T8, and T9 are connected to the initialization signal. The source of the ninth switch transistor T9 is connected to the anode of the light-emitting element. The gates of the tenth and eleventh switch transistors T10 and T11 are connected to the light-emitting control signal. The source of the tenth switch transistor T10 is connected to the positive voltage input signal ELVDD, and the drain of the eleventh switch transistor T11 is connected to the anode of the light-emitting element. The cathode of the light-emitting element is connected to ELVSS, where ELVSS is the common terminal of the light-emitting elements and can be a negative voltage input signal or a ground signal.

[0101] like Figure 5 As shown, the control steps of the pixel driving circuit driving the light-emitting element are divided into three stages, including an initialization stage, a compensation stage and a light-emitting stage.

[0102] 1. Initialization Phase: The preprocessing signal is set to -7V, and the light-emission control signal and operating control signal are set to +7V. At this point, the seventh switch tube T7, the eighth switch tube T8, and the ninth switch tube T9 are turned on, and the remaining switches are turned off. The initialization signal is then set to -3V to remove any residual potential in the light-emitting element, preventing uncontrolled light emission during the light-emission phase. This also lowers the gate voltage of the first switch tube T1 and the second switch tube T2 to -3V, allowing them to turn on.

[0103] 2. Compensation stage: In this stage, the working control signal is set to -7V, the light control signal and the initialization signal are set to +7V, and the third switch tube T3, the fourth switch tube T4 and the fifth switch tube T5 are turned on, and the other switch tubes are turned off. At this time, since the gates of the first switch tube T1 and the second switch tube T2 are written with a -3V potential in the initialization stage, they are also in the open state at the beginning of this stage. The voltage compensation signal can be set to 2V~6V, such as Figure 3 As shown, the voltage compensation signal is written to the gate of the first switch tube T1 and the gate of the second switch tube T2 through the third switch tube T3, the first switch tube T1, the fourth switch tube T4 and the third switch tube T3, the second switch tube T2, and the fifth switch tube T5, respectively, raising the potential of the gate. When the gate potential V th1 +V data When the first switch tube T1 is turned off, the gate potential of the second switch tube T2 is V th2 +V dataWhen the second switch tube T2 is turned off, since the gate of the first switch tube T1 and the gate of the second switch tube T2 are connected, when one of the switches is turned off, the storage capacitor in the potential storage module 130 is charged by the other path. Therefore, the final gate voltage of the first switch tube T1 and the second switch tube T2 is V th1 +V data and V th2 +V data The larger of .

[0104] 3. Lighting stage: In this stage, the light-emitting control signal is set to -7V, the working control signal and the pre-processing signal are set to +7V, the tenth switch tube T10 and the eleventh switch tube T11 are turned on, the voltage input signal ELVDD = 6V, ELVSS = -3V. At this time, the source voltage Vs of the first switch tube T1 and the second switch tube T2 are both ELVDD = 6V, V gs Also smaller than V th , forming a path, at this time the current I on the two switch tube paths is I=K(V gs -V th ) 2 Since the gate voltage of the two switching tubes is V th1 +V data and V th2 +V data The larger of the two, so the current is K(V data -ELVDD) 2 and K(V data -ELVDD+ΔV th ) 2 Where K is the mobility of the switch tube.

[0105] Based on the above, if Figure 4 As shown, the compensation unit 121 may further include a sixth switch tube T6, the gate of the sixth switch tube T6 being connected to the gate of the fifth switch tube T5, the source of the sixth switch tube T6 being used to access the voltage compensation signal, and the source of the second switch tube T2 and the drain of the tenth switch tube T10 being connected to the drain of the sixth switch tube T6.

[0106] The working control signal includes a first working control signal and a second working control signal. The gates of the fifth switch tube T5 and the sixth switch tube T6 are both connected to the second working control signal, and the gates of the third switch tube T3 and the fourth switch tube T4 are both connected to the first working control signal. Figure 6 As shown, the control phase of the pixel driving circuit includes an initialization phase, a first compensation phase, a second compensation phase and a light emitting phase. The specific implementation process is as follows:

[0107] 1. Initialization Phase: The preprocessing signal is set to -7V, and the light-emission control signal and the first operating control signal are set to +7V. At this point, the seventh switch transistor T7, the eighth switch transistor T8, and the ninth switch transistor T9 are turned on, and the remaining switches are turned off. The initialization signal is then set to -3V to remove any residual potential in the light-emitting element, preventing uncontrolled light emission during the light-emission phase. This also lowers the gate voltage of the first and second switch transistors T1 and T2 to -3V, allowing them to be turned on.

[0108] 2. First compensation stage: In this stage, the first working control signal is set to -7V, the light emitting control signal, the second working control signal and the initialization signal are set to +7V, the third switch tube T3 and the fourth switch tube T4 are turned on, and the other switches are turned off. At this time, since the gate of the first switch tube T1 is written with a -3V potential in the initialization stage, it is also in the open state at the beginning of this stage. The voltage compensation signal can be set to 2V~6V, such as Figure 4 As shown, the voltage compensation signal is written to the gate of the first switch tube T1 through the third switch tube T3, the first switch tube T1 and the fourth switch tube T4, raising the potential of the gate. th1 +V data When the first switch tube T1 is turned off, the voltage stored in the first storage capacitor C1 is V th1 +V data Among them, V th1 is the threshold voltage of the first switch tube T1, V data is the voltage value of the voltage compensation signal.

[0109] 3. Second compensation stage: In this stage, the second working control signal is set to -7V, the light emitting control signal, the first working control signal and the initialization signal are set to +7V, the fifth switch tube T5 and the sixth switch tube T6 are turned on, and the other switches are turned off. At this time, since the gate of the second switch tube T2 is written with a -3V potential in the initialization stage, it is also in the open state at the beginning of this stage. The voltage compensation signal can be set to 2V~6V, such as Figure 4 As shown, the voltage compensation signal is written to the gate of the second switch tube T2 through the sixth switch tube T6, the second switch tube T2 and the fifth switch tube T5, raising the potential of the gate. th2 +V data When the second switch tube T2 is turned off, the voltage stored in the second storage capacitor C2 is V th2 +V data Among them, V th2 is the threshold voltage of the second switch tube T2.

[0110] 4. Lighting stage: In this stage, the light-emitting control signal is set to -7V, the first working control signal, the second working control signal and the pre-processing signal are set to +7V, the tenth switch tube T10 and the eleventh switch tube T11 are turned on, and the other switch tubes are turned off. ELVDD = 6V, ELVSS = -3V. At this time, the source voltage Vs of the first switch tube T1 and the second switch tube T2 are both ELVDD = 6V, V gs Also smaller than V th , forming a path, at this time the current I on the two switch tube paths is I=K(V gs -V th ) 2 , are K(V data -ELVDD) 2 Among them, K is the mobility of the switch tube, V gs is the gate-source voltage, V th is the threshold voltage of the switch.

[0111] In addition, the pixel driving circuit can control the number of switching transistors used in the driving unit 122 through a voltage compensation signal. Specifically, during the compensation phase, by setting the voltage value of the voltage compensation signal to be greater than the forward voltage input signal ELVDD, the switching transistor in the compensation phase can be turned off, so that the switching transistor does not provide driving. Conversely, if a switching transistor is required to provide driving, the value of the voltage compensation signal transmitted to the switching transistor can be set to be less than the forward voltage input signal ELVDD during the compensation phase of the switching transistor.

[0112] The pixel driver circuit's driver unit 122 uses two switching transistors to provide drive, doubling the current driving capability. In practical applications, the number of switching transistors in the driver unit 122 is not limited to two. Therefore, the current driving capability of this circuit architecture can be more than double that of existing architectures, and each switching transistor in the driver unit 122 has a compensation effect.

[0113] The pixel driver circuit in this embodiment uses a first switch transistor T1 and a second switch transistor T2 to drive the light-emitting element, thereby improving the driving capability of the pixel driver circuit. Furthermore, by providing a voltage compensation signal to compensate for the threshold voltages of the first and second switches T1 and T2 in the driver unit 122, the current flowing through the light-emitting element is not affected by the switch threshold voltages, thereby improving the quality of the current transmitted to the light-emitting element and further ensuring the normal operation of the light-emitting element. Furthermore, by controlling the number of switches used in the driver unit 122 using a voltage compensation signal, the pixel driver circuit can be used at low currents, expanding the application range of the pixel driver circuit.

[0114] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A pixel driving circuit, characterized in that: It includes a preprocessing module, a driving module, a potential storage module and a light control module; the driving module, the potential storage module and the light control module are all connected to the preprocessing module, the potential storage module and the light control module are all connected to the driving module, and the potential storage module is connected to the light control module; the light control module is used to receive a voltage input signal and to connect to a light-emitting element; The preprocessing module receives the preprocessing signal and is used to control the operation of the driving module according to the preprocessing signal; When the driving module is working, the driving module receives a voltage compensation signal, and the voltage compensation signal is used to perform voltage compensation on the driving module; The potential storage module is used to store the potential after the voltage compensation signal is used to compensate the driving module for voltage; After being turned on, the light-emitting control module controls the operation of the light-emitting element according to the potential stored in the potential storage module and the voltage input signal; the driving module includes a compensation unit and a driving unit, the driving unit and the potential storage module are both connected to the compensation unit, and the potential storage module, the pre-processing module and the light-emitting control module are all connected to the driving unit; when the compensation unit is in operation, it receives the voltage compensation signal and transmits it to the driving unit; The driving unit includes a first switching tube and a second switching tube; The potential storage module, the pre-processing module, and the compensation unit are all connected to the control end of the first switching tube, the first end of the second switching tube and the compensation unit are both connected to the first end of the first switching tube, the compensation unit and the light control module are both connected to the second end of the first switching tube, and the control end of the first switching tube is used to receive the voltage compensation signal; The potential storage module, the preprocessing module, and the compensation unit are all connected to the control end of the second switching tube, the light control module is connected to the first end of the second switching tube, the compensation unit and the light control module are both connected to the second end of the second switching tube, and the control end of the second switching tube is used to receive the voltage compensation signal; The compensation unit is used to receive a working control signal, and the working control signal is used to control whether the compensation unit works; the working control signal is a high or low level signal; The compensation unit includes a third switch tube, a fourth switch tube and a fifth switch tube; the control end of the third switch tube, the control end of the fourth switch tube and the control end of the fifth switch tube are all used to receive the working control signal; The first end of the third switch tube is used to receive the voltage compensation signal, and the first end of the first switch tube and the first end of the second switch tube are both connected to the second end of the third switch tube; The second end of the first switch tube, the second end of the fifth switch tube and the light control module are all connected to the first end of the fourth switch tube, and the preprocessing module and the potential storage module are both connected to the second end of the fourth switch tube; The second end of the second switch tube and the light control module are both connected to the first end of the fifth switch tube, and the second end of the fifth switch tube is connected to the control end of the second switch tube.

2. The pixel driving circuit according to claim 1, wherein: The working control signal includes a first working control signal and a second working control signal. The compensation unit also includes a sixth switching tube, the first end of the sixth switching tube is used to receive the voltage compensation signal, the first end of the second switching tube and the light control module are both connected to the second end of the sixth switching tube, the control end of the sixth switching tube and the control end of the fifth switching tube are both used to receive the second working control signal, and the control end of the third switching tube and the control end of the fourth switching tube are both used to receive the first working control signal.

3. The pixel driving circuit according to claim 1, wherein: The pre-processing module is further configured to receive an initialization signal and transmit the signal to the light emitting element, wherein the initialization signal is configured to remove a residual potential of the light emitting element.

4. The pixel driving circuit according to claim 3, wherein: The preprocessing module includes a first preprocessing unit and a second preprocessing unit, the first preprocessing unit is connected to the second preprocessing unit and connected to the driving module, and the second preprocessing unit is used to connect to the light emitting element; The first preprocessing unit is used to access the preprocessing signal and the initialization signal, and the second preprocessing unit is used to access the preprocessing signal and the initialization signal.

5. The pixel driving circuit according to claim 4, wherein: The first pre-processing unit includes a seventh switching tube and an eighth switching tube, and the second pre-processing unit includes a ninth switching tube; The first end of the seventh switch tube and the first end of the eighth switch tube are both connected to the driving module, the second end of the seventh switch tube and the second end of the eighth switch tube are both connected to the second end of the ninth switch tube, and the first end of the ninth switch tube is used to connect to the light-emitting element; The control end of the seventh switch tube and the control end of the eighth switch tube are both used to access the preprocessing signal, the second end of the seventh switch tube and the second end of the eighth switch tube are both used to access the initialization signal, the control end of the ninth switch tube is used to access the preprocessing signal, and the second end of the ninth switch tube is used to access the initialization signal.

6. The pixel driving circuit according to claim 1, wherein: The potential storage module includes a first storage capacitor and a second storage capacitor, the first end of the first storage capacitor and the first end of the second storage capacitor are both connected to the driving module, and the second end of the first storage capacitor and the second end of the second storage capacitor are both connected to the light control module.

7. The pixel driving circuit according to claim 1, wherein: The light-emitting control module includes a tenth switching tube and an eleventh switching tube. The first end of the tenth switching tube is connected to the storage module and is used to receive the voltage input signal. The second end of the tenth switching tube and the first end of the eleventh switching tube are both connected to the driving module. The second end of the eleventh switching tube is used to connect to the light-emitting element. The control ends of the tenth switching tube and the eleventh switching tube are both used to receive the light-emitting control signal.

8. A display device, characterized in that: The invention comprises a light emitting element and a pixel driving circuit according to any one of claims 1 to 7.

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