Pixel driving circuit, display panel, and display device

Abstract

A pixel driving circuit (100), a display panel, and a display device are provided. A first driving module (10) of the pixel driving circuit (100) receives a first scanning signal (Scan1) and a data signal (Data), and selectively receives a first voltage from a first power supply terminal (Vodd) and a second voltage from a second power supply terminal (Veven) based on the first scanning signal (Scan1) and the data signal (Data). A second driving module (20) receives a second scanning signal (Scan2) and a data signal (Data), and selectively receives a second voltage from the first power supply terminal (Vodd) and a first voltage from the second power supply terminal (Veven) based on the second scanning signal (Scan2) and the data signal (Data). The first and second voltages received by the first driving module 10 and the first and second voltages received by the second driving module 20 are alternately applied to both ends of the light-emitting unit 30 to drive the light-emitting unit 30 to emit light. Each driving component in the pixel driving circuit 100 can be driven intermittently using alternating current (AC) driving, allowing the driving components to timely release heat generated during operation. As a result, the operating temperature of the driving components can be effectively reduced, and the lifespan of the driving components can be improved.

Description

[Technical Field]

[0001] REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202211248819.0, filed on October 12, 2022, entitled "Pixel driving circuit, display panel, and display device," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of display technology, and in particular to a pixel driving circuit, a display panel having the pixel driving circuit, and a display device having the display panel. [Background technology]

[0003] As a new generation display technology, micro light emitting diodes (Micro LEDs) have advantages such as thinness and light weight, high brightness, low power consumption, fast response, high resolution, excellent flexibility, high luminous efficiency, and high contrast, which can meet new consumer demands for display technology. Therefore, they are widely used in various display devices such as Micro LED display panels and Organic Light Emitting Diode (OLED) display panels.

[0004] However, existing micro LED display panels or OLED display panels typically use direct current (DC) driving, which increases the operating temperature of the driving transistors in the pixel driving circuit, significantly reducing the lifespan of the driving transistors and increasing the overall power consumption of the display panel. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present application aims to provide a pixel driving circuit, a display panel, and a display device, in which each transistor of the pixel driving circuit can transmit a voltage intermittently and use the intermittent period to dissipate heat generated by the voltage transmission, thereby reducing the operating temperature of each transistor and improving the lifespan of each transistor.

[0006] In a first aspect, the present application provides a pixel driving circuit, the pixel driving circuit including a first driving module, a light-emitting unit, and a second driving module, the first driving module and the second driving module being electrically connected to the light-emitting unit, a first power supply end, and a second power supply end, the first driving module receiving a first scanning signal and a data signal, and selectively receiving a first voltage from the first power supply end and a second voltage from the second power supply end according to the first scanning signal and the data signal; No. The second driving module receives the second scanning signal and the data signal, and selectively receives the second voltage from the first power supply terminal and the first voltage from the second power supply terminal according to the second scanning signal and the data signal. The first voltage and the second voltage received by the first driving module, and The first voltage and the second voltage received by the second driving module are alternately applied across the light emitting unit to drive the light emitting unit to emit light.

[0007] In some embodiments, the first driving module includes a first light-emitting driving circuit and a second light-emitting driving circuit, a first end of the first light-emitting driving circuit electrically connected to a first power supply end and adapted to receive a first voltage from the first power supply end, a second end of the first light-emitting driving circuit electrically connected to the light-emitting unit, a first end of the second light-emitting driving circuit electrically connected to the light-emitting unit, and a second end of the second light-emitting driving circuit electrically connected to a second power supply end and adapted to receive a second voltage from the second power supply end.

[0008] In some embodiments, the second driving module includes a third light-emitting driving circuit and a fourth light-emitting driving circuit, a first end of the third light-emitting driving circuit electrically connected to the second power supply end and adapted to receive a first voltage from the second power supply end, a second end of the third light-emitting driving circuit electrically connected to the light-emitting unit, a first end of the fourth light-emitting driving circuit electrically connected to the first power supply end and adapted to receive a second voltage from the first power supply end, and a second end of the fourth light-emitting driving circuit electrically connected to the light-emitting unit.

[0009] In some embodiments, the light-emitting unit comprises a light-emitting element, the light-emitting element having a first end and a second end, and both the first end and the second end of the light-emitting element are electrically connected to the first driving module and the second driving module.

[0010] In some embodiments, the first light-emitting drive circuit includes a first transistor and a second transistor, and the second light-emitting drive circuit includes a third transistor. The control end of the first transistor is used to receive a data signal, the first end of the first transistor is electrically connected to a first power supply end and is used to receive a first voltage from the first power supply end, and the second end of the first transistor is electrically connected to a first end of the second transistor. The control end of the second transistor is used to receive a first scanning signal, and the second end of the second transistor is electrically connected to a first end of the light-emitting element. The control end of the third transistor is used to receive the first scanning signal, the first end of the third transistor is electrically connected to a second end of the light-emitting element, and the second end of the third transistor is electrically connected to a second power supply end and is used to receive a second voltage from the second power supply end.

[0011] In some embodiments, the third light-emitting drive circuit includes a fourth transistor and a fifth transistor, and the fourth light-emitting drive circuit includes a sixth transistor. The control end of the fourth transistor is used to receive a data signal, the first end of the fourth transistor is electrically connected to the second power supply end and is used to receive a first voltage from the second power supply end, and the second end of the fourth transistor is electrically connected to the first end of the fifth transistor. The control end of the fifth transistor is used to receive a second scanning signal, and the second end of the fifth transistor is electrically connected to the first end of the light-emitting element. The control end of the sixth transistor is used to receive the second scanning signal, the first end of the sixth transistor is electrically connected to the second end of the light-emitting element, and the second end of the sixth transistor is electrically connected to the first power supply end and is used to receive a second voltage from the first power supply end.

[0012] In some embodiments, when the control end of the first transistor receives a data signal and the first scanning signal is at a first potential, the first transistor, the second transistor, and the third transistor are all in an on state, a first voltage is transmitted to a first end of the light-emitting element through the first transistor and the second transistor, and a second voltage is transmitted to a second end of the light-emitting element through the third transistor, and the light-emitting element is driven by the first voltage and the second voltage to emit light. When the control end of the fourth transistor receives a data signal and the second scanning signal is at a first potential, the fourth transistor, the fifth transistor, and the sixth transistor are all in an on state, a first voltage is transmitted to a first end of the light-emitting element through the fourth transistor and the fifth transistor, and a second voltage is transmitted to a second end of the light-emitting element through the sixth transistor, and the light-emitting element is driven by the first voltage and the second voltage to emit light.

[0013] In some embodiments, the pixel driving circuit further includes a signal short-circuiting circuit, the signal short-circuiting circuit including a plurality of switch sub-circuits electrically connected to the first driving module and the second driving module, and when switching between the first driving module and the second driving module to drive the light-emitting unit to emit light, the switch sub-circuits short-circuit the first scanning signal and the second scanning signal.

[0014] In a second aspect, the present application provides a display panel, comprising: a signal controller and a plurality of the pixel driving circuits, the signal controller being used to provide a first scanning signal and a second scanning signal to the pixel driving circuits.

[0015] In a third aspect, the present application provides a display device, comprising: a power supply module and the display panel, wherein the power supply module is used to supply power to the display panel.

[0016] As described above, in the pixel driving circuit, display panel, and display device of the present application, the pixel driving circuit is provided with a first driving module and a second driving module, the first driving module is provided with a first light-emitting driving circuit and a second light-emitting driving circuit, the first light-emitting driving circuit applies a first voltage to the light-emitting element, and the second light-emitting driving circuit applies a second voltage to the light-emitting element.

[0017] The second driving module is provided with a third light-emitting driving circuit and a fourth light-emitting driving circuit. The third light-emitting driving circuit applies a first voltage to the light-emitting element, and the fourth light-emitting driving circuit applies a second voltage to the light-emitting element. By controlling the potential status of the first scanning signal transmitted to the first driving module and the potential status of the second scanning signal transmitted to the second driving module, the first driving module and the second driving module alternately drive the light-emitting units to emit light. This allows the transistors of the first driving module and the second driving module to transmit voltage intermittently, and the intermittent periods can be used to dissipate heat generated by the voltage transmission, thereby reducing the operating temperature of the transistors and improving the lifespan of the transistors, and further improving the lifespan of the display panel and the display device.

[0018] Furthermore, the pixel driving circuit further includes a signal short circuit, which shorts the first scanning signal and the second scanning signal to realize charge sharing between the first scanning signal and the second scanning signal when switching between the first driving module and the second driving module to drive the light-emitting unit to emit light, thereby reducing the power consumption required for switching between the potentials of the first scanning signal and the second scanning signal, thereby reducing the power consumption of the pixel driving circuit and further effectively reducing the power consumption of the display panel and the display device. [Brief explanation of the drawings]

[0019] In order to more clearly explain the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for the embodiments. Obviously, the drawings described are some embodiments of the present application, and those skilled in the art can obtain other drawings from these drawings without creative efforts. [Figure 1] FIG. 1 is a schematic diagram showing the circuit structure of a pixel driving circuit disclosed in an embodiment of the present application. [Figure 2] FIG. 2 is a schematic diagram showing a specific circuit structure of the pixel driving circuit shown in FIG. [Figure 3] FIG. 3 is a diagram showing a driving time sequence of the pixel driving circuit shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] To facilitate an understanding of the present application, the present application will now be described more fully with reference to the associated drawings. Preferred embodiments of the present application are illustrated in the drawings. However, the present application may be embodied in many different forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present application.

[0021] The following description of each embodiment will be made with reference to the accompanying drawings to illustrate specific embodiments in which the present application may be practiced. In this specification, the numerals attached to components, such as "first" and "second," are used only to distinguish between the objects being described and have no sequential or technical significance. The terms "connect" and "couple" in this application include direct connection (coupled) and indirect connection (coupled), unless otherwise specified. Terms indicating directions used in this application, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and "side," refer only to the directions in the accompanying drawings. Therefore, the directional terms used are intended to facilitate a clearer and more easily understood description and understanding of the present application, and do not expressly or imply that a device or element necessarily has a specific orientation or is configured and operated in a specific direction, and therefore should not be construed as limiting the present application.

[0022] In the description of this application, unless otherwise clearly specified or limited, terms such as "attach," "couple," and "connect" should be understood in a broader sense. For example, they may be fixedly connected, detachably connected, or integrally connected, mechanically connected, directly connected, indirectly connected via a medium, or internally connected between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application depending on the specific circumstances. Note that terms such as "first" and "second" in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific sequence. Furthermore, the terms "include," "may include," "comprise," or "can comprise" used in this application indicate the presence of the corresponding disclosed functions, operations, elements, etc., and do not limit the presence of one or more other additional functions, operations, elements, etc. Furthermore, the terms "comprise" or "comprise" indicate the presence of a corresponding feature, number, step, operation, element, component, or combination thereof disclosed herein, and are intended to cover, without excluding, the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof. Furthermore, as used herein, "at least one" means one or more, such as one, two, or three, and "plurality" means at least two, such as two or three, unless clearly and specifically limited. Terms such as "Step 1," "Step 2," and the like in the specification, claims, and drawings of this application are used to distinguish between different objects, not to describe a particular sequence.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terms used herein are for the purpose of describing specific embodiments only and are not intended to be limiting of this application.

[0024] Referring to Fig. 1, Fig. 1 is a schematic diagram showing the circuit structure of a pixel driving circuit 100 disclosed in an embodiment of the present application. As shown in Fig. 1, the pixel driving circuit 100 according to an embodiment of the present application includes a first driving module 10, a second driving module 20, and a light-emitting unit 30. The first driving module 10 and the second driving module 20 are both electrically connected to the light-emitting unit 30, a first power supply terminal Vodd, and a second power supply terminal Veven.

[0025] The first driving module 10 receives a first scanning signal Scan1 and a data signal Data, and selectively receives a first voltage from a first power supply terminal Vodd and a second voltage from a second power supply terminal Veven according to the first scanning signal Scan1 and the data signal Data. No. The second driving module 20 receives the second scanning signal Scan2 and the data signal Data, and selectively receives the second voltage from the first power supply terminal Vodd and the first voltage from the second power supply terminal Veven according to the second scanning signal Scan2 and the data signal Data.

[0026] the first voltage and the second voltage received by the first driving module 10; and The first voltage and the second voltage received by the second driving module 20 are alternately applied to both ends of the light-emitting unit 30 to drive the light-emitting unit 30 to emit light.

[0027] In the embodiment of the present application, the first driving module 10 and the second driving module 20 are provided to alternately drive the light emitting units 30 to emit light, and the driving components in the first driving module 10 and the second driving module 20 can operate intermittently using alternating current (AC) driving, and the driving components can release heat generated during operation in a timely manner, thereby effectively reducing the operating temperature of the driving components and improving the lifespan of the driving components.

[0028] 2, which is a schematic diagram showing a specific circuit structure of the pixel driving circuit 100 shown in FIG. 1. In an embodiment of the present application, the light-emitting unit 30 includes a light-emitting element 31, which has a first end and a second end, and the first end and the second end of the light-emitting element 31 are both electrically connected to a first driving module 10 and a second driving module 20. The first driving module 10 and the second driving module 20 are used to apply a first voltage and a second voltage to both ends of the light-emitting element 31 to drive the light-emitting element 31 to emit light.

[0029] In a specific embodiment of the present application, the first end of the light-emitting element 31 may be an anode, and the second end of the light-emitting element 31 may be a cathode, and the present application is not specifically limited thereto.

[0030] In a specific embodiment of the present application, the light-emitting element 31 may be an organic light-emitting diode (OLED) or a micro light-emitting diode (Micro LED), and the present application is not specifically limited thereto.

[0031] In the embodiment of the present application, the first driving module 10 includes a first light-emitting driving circuit 12 and a second light-emitting driving circuit 14. The first light-emitting driving circuit 12 is used to supply a first voltage to the light-emitting unit 30, and the second light-emitting driving circuit 14 is used to supply a second voltage to the light-emitting unit 30.

[0032] A first end of the first light-emitting drive circuit 12 is electrically connected to the first power supply end Vodd and is used to receive a first voltage from the first power supply end Vodd, and a second end of the first light-emitting drive circuit 12 is electrically connected to the light-emitting unit 30. When the first light-emitting drive circuit 12 receives the data signal Data and the first scanning signal Scan1 having a first potential, the first voltage is transmitted to the light-emitting unit 30 through the first light-emitting drive circuit 12. Specifically, the first voltage is transmitted to the first end of the light-emitting element 31 through the first light-emitting drive circuit 12.

[0033] A first end of the second light-emitting driving circuit 14 is electrically connected to the light-emitting unit 30, and a second end of the second light-emitting driving circuit 14 is electrically connected to the second power supply end Veven and is used to receive a second voltage from the second power supply end Veven. When the second light-emitting driving circuit 14 receives the data signal Data and the first scanning signal Scan1 having the first potential, the second voltage is transmitted to the light-emitting unit 30 through the second light-emitting driving circuit 14. Specifically, the second voltage is transmitted to the second end of the light-emitting element 31 through the second light-emitting driving circuit 14.

[0034] At this time, the first voltage is transmitted to the first terminal of the light-emitting element 31 through the first light-emitting drive circuit 12, and the second voltage is transmitted to the second terminal of the light-emitting element 31 through the second light-emitting drive circuit 14, and the light-emitting element 31 can be driven to emit light by the first voltage and the second voltage applied to the light-emitting element 31.

[0035] As shown in FIG. 2, in a specific embodiment of the present application, the first light-emitting driving circuit 12 may include a first transistor 12a and a second transistor 12b, which receive a first voltage from a first power supply terminal Vodd and selectively transmit the first voltage to the light-emitting unit 30. The first transistor 12a and the second transistor 12b are connected in series between the first power supply terminal Vodd and a first terminal of the light-emitting element 31. Specifically, the first transistor 12a and the second transistor 12b each include a control terminal, a first terminal, and a second terminal. The control terminal of the first transistor 12a is used to receive a data signal Data. The first terminal of the first transistor 12a is electrically connected to the first power supply terminal Vodd and is used to receive the first voltage from the first power supply terminal Vodd. The second terminal of the first transistor 12a is electrically connected to the first terminal of the second transistor 12b. The control terminal of the second transistor 12b is used to receive a first scanning signal Scan1. The second terminal of the second transistor 12 b is electrically connected to the first terminal of the light emitting element 31 .

[0036] When the control end of the first transistor 12a receives the data signal Data and the first scanning signal Scan1 is at a first potential, the first transistor 12a and the second transistor 12b are both in an on state, and the first voltage is transmitted to the first end of the light-emitting element 31 through the first transistor 12a and the second transistor 12b.

[0037] When the control end of the first transistor 12a receives the data signal Data and the first scanning signal Scan1 is at the second potential, the first transistor 12a is in an on state and the second transistor 12b is in an off state, and the first voltage cannot be transmitted to the first end of the light-emitting element 31 through the first transistor 12a and the second transistor 12b.

[0038] In a specific embodiment of the present application, the second light-emitting driving circuit 14 may include a third transistor 14a. The third transistor 14a includes a control end, a first end, and a second end. The control end of the third transistor 14a is used to receive a first scanning signal Scan1. The first end of the third transistor 14a is electrically connected to the second end of the light-emitting element 31. The second end of the third transistor 14a is electrically connected to the second power supply end Veven and is used to receive a second voltage from the second power supply end Veven.

[0039] When the first scanning signal Scan1 received by the third transistor 14a is at the first potential, the third transistor 14a is in an on state, and the second voltage is transmitted to the second terminal of the light-emitting element 31 through the third transistor 14a.

[0040] When the first scanning signal Scan1 received by the third transistor 14a is at the second potential, the third transistor 14a is in an off state, and the second voltage cannot be transmitted to the second terminal of the light-emitting element 31 through the third transistor 14a.

[0041] 2 , in the embodiment of the present application, the second driving module 20 includes a third light-emitting driving circuit 22 and a fourth light-emitting driving circuit 24. The third light-emitting driving circuit 22 is used to supply a first voltage to the light-emitting unit 30, and the fourth light-emitting driving circuit 24 is used to supply a second voltage to the light-emitting unit 30.

[0042] A first end of the third light-emitting driving circuit 22 is electrically connected to the second power supply end Veven and is used for receiving a first voltage from the second power supply end Veven, and a second end of the third light-emitting driving circuit 22 is electrically connected to the light-emitting unit 30. When the third light-emitting driving circuit 22 receives the data signal Data and the second scanning signal Scan2 having a first potential, the first voltage is transmitted to the light-emitting unit 30 through the third light-emitting driving circuit 22. Specifically, the first voltage is transmitted to a first end of the light-emitting element 31 through the third light-emitting driving circuit 22.

[0043] A first end of the fourth light-emitting drive circuit 24 is electrically connected to the first power supply end Vodd and is used for receiving the second voltage from the first power supply end Vodd, and a second end of the fourth light-emitting drive circuit 24 is electrically connected to the light-emitting unit 30. When the fourth light-emitting drive circuit 24 receives the data signal Data and the second scan signal Scan2 having the first potential, the second voltage is transmitted to the light-emitting unit 30 through the fourth light-emitting drive circuit 24. Specifically, the second voltage is transmitted to the second end of the light-emitting element 31 through the fourth light-emitting drive circuit 24.

[0044] At this time, the first voltage is transmitted to the first terminal of the light-emitting element 31 through the third light-emitting driving circuit 22, and the second voltage is transmitted to the second terminal of the light-emitting element 31 through the fourth light-emitting driving circuit 24, and the light-emitting element 31 can be driven to emit light by the first voltage and the second voltage applied to the light-emitting element 31.

[0045] As shown in FIG. 2 , in a specific embodiment of the present application, the third light-emitting driving circuit 22 may include a fourth transistor 22a and a fifth transistor 22b, which receive a first voltage from the second power supply terminal Veven and selectively transmit the first voltage to the light-emitting unit 30. The fourth transistor 22a and the fifth transistor 22b are connected in series between the second power supply terminal Veven and a first terminal of the light-emitting element 31. Specifically, the fourth transistor 22a and the fifth transistor 22b each include a control terminal, a first terminal, and a second terminal. The control terminal of the fourth transistor 22a is used to receive a data signal Data. The first terminal of the fourth transistor 22a is electrically connected to the second power supply terminal Veven and is used to receive the first voltage from the second power supply terminal Veven. The second terminal of the fourth transistor 22a is electrically connected to the first terminal of the fifth transistor 22b. The control terminal of the fifth transistor 22b is used to receive a second scanning signal Scan2. The second terminal of the fifth transistor 22b is electrically connected to the first terminal of the light-emitting element 31.

[0046] When the control end of the fourth transistor 22a receives the data signal Data and the second scanning signal Scan2 is at the first potential, the fourth transistor 22a and the fifth transistor 22b are both in the on state, and the first voltage is transmitted to the first end of the light-emitting element 31 through the fourth transistor 22a and the fifth transistor 22b.

[0047] When the control end of the fourth transistor 22a receives the data signal Data and the second scan signal Scan2 is at the second potential, the fourth transistor 22a is in an on state, the fifth transistor 22b is in an off state, and the first voltage cannot be transmitted to the first end of the light-emitting element 31 through the fourth transistor 22a and the fifth transistor 22b.

[0048] 2, in a specific embodiment of the present application, the fourth light-emitting driving circuit 24 may include a sixth transistor 24a. The sixth transistor 24a includes a control end, a first end, and a second end. The control end of the sixth transistor 24a is used to receive a second scanning signal Scan2. The first end of the sixth transistor 24a is electrically connected to the second end of the light-emitting element 31. The second end of the sixth transistor 24a is electrically connected to the first power supply end Vodd and is used to receive a second voltage from the first power supply end Vodd.

[0049] When the second scanning signal Scan2 received by the sixth transistor 24a is at the first potential, the sixth transistor 24a is in an on state, and the second voltage is transmitted to the second terminal of the light-emitting element 31 through the sixth transistor 24a.

[0050] When the second scanning signal Scan2 received by the sixth transistor 24a is at the second potential, the sixth transistor 24a is in an off state, and the second voltage cannot be transmitted to the second terminal of the light-emitting element 31 through the sixth transistor 24a.

[0051] In an embodiment of the present application, the first transistor 12 a, the second transistor 12 b, the third transistor 14 a, the fourth transistor 22 a, the fifth transistor 22 b, and the sixth transistor 24 a may all be metal-oxide-semiconductor field-effect transistors (MOSFETs, abbreviated as MOS transistors). Specifically, the first transistor 12 a, the second transistor 12 b, the third transistor 14 a, the fourth transistor 22 a, the fifth transistor 22 b, and the sixth transistor 24 a may be N-type MOS transistors or P-type transistors, and the present application is not specifically limited thereto.

[0052] In the embodiment of the present application, the first end may be the drain (Drain, D) of each transistor, the second end may be the source (Source, S) of each transistor, and the control end may be the gate (Gate, G) of each transistor, which are not specifically limited in the present application.

[0053] In the embodiment of the present application, the first potential may be a high potential, and the second potential may be a low potential, and the present application is not specifically limited thereto.

[0054] In an embodiment of the present application, a first driving module 10 and a second driving module 20 are provided. A first light-emitting driving circuit 12 and a second light-emitting driving circuit 14 are provided in the first driving module 10, so that the first light-emitting driving circuit 12 applies a first voltage to a first terminal of the light-emitting element 31, and the second light-emitting driving circuit 14 applies a second voltage to a second terminal of the light-emitting element 31. A third light-emitting driving circuit 22 and a fourth light-emitting driving circuit 24 are provided in the second driving module 20, so that the third light-emitting driving circuit 22 applies a first voltage to a first terminal of the light-emitting element 31, and the fourth light-emitting driving circuit 24 applies a second voltage to a second terminal of the light-emitting element 31. By controlling the potential status of the first scanning signal Scan1 transmitted to the first driving module 10 and the potential status of the second scanning signal Scan2 transmitted to the second driving module 20, the first driving module 10 and the second driving module 20 alternately apply a first voltage and a second voltage to the light-emitting element 31, thereby driving the light-emitting unit 30 to emit light. This allows each transistor of the first driving module 10 and each transistor of the second driving module 20 to transmit voltage intermittently, and utilizes the intermittent periods to dissipate heat generated by the voltage transmission, thereby reducing the operating temperature of each transistor and further improving the lifespan of each transistor.

[0055] In the embodiment of the present application, when the control end of the first transistor 12a receives the data signal Data and the first scanning signal Scan1 is at a first potential, the first power supply end Vodd is used to transmit a first voltage, and the second power supply end Veven is used to transmit a second voltage. The control end of the fourth transistor 22a receives the data signal Data, and the second scanning signal Scan2 is at a first potential. No. 1 When at potential, the first power supply terminal Vodd is used to transmit the second voltage and the second power supply terminal Veven is used to transmit the first voltage.

[0056] 1 and 2, the operation process of the pixel driving circuit 100 will be outlined below.

[0057] When the control end of the first transistor 12a receives the data signal Data and the first scanning signal Scan1 is at a first potential, the first transistor 12a, the second transistor 12b, and the third transistor 14a are all in an on state, the first voltage is transmitted to the first end of the light-emitting element 31 through the first transistor 12a and the second transistor 12b, and the second voltage is transmitted to the second end of the light-emitting element 31 through the third transistor 14a. In this case, the light-emitting element 31 is driven by the first driving module 10 to emit light.

[0058] When the control end of the fourth transistor 22a receives the data signal Data and the second scanning signal Scan2 is at the first potential, the fourth transistor 22a, the fifth transistor 22b, and the sixth transistor 24a are all in an on state, the first voltage is transmitted to the first end of the light-emitting element 31 through the fourth transistor 22a and the fifth transistor 22b, and the second voltage is transmitted to the second end of the light-emitting element 31 through the sixth transistor 24a. In this case, the light-emitting element 31 is driven by the second driving module 20 to emit light.

[0059] By switching between the potential of the first scanning signal Scan1 and the potential of the second scanning signal Scan2, the first driving module 10 and the second driving module 20 alternately drive the light emitting units 30 to emit light.

[0060] As shown in FIG. 2 , in one embodiment of the present application, the pixel driving circuit 100 may further include a signal short-circuit 50. The signal short-circuit 50 is electrically connected to the first driving module 10 and the second driving module 20. When switching between the first driving module 10 and the second driving module 20 to drive the light-emitting unit 30 to emit light, the signal short-circuit 50 short-circuits the first scanning signal Scan1 and the second scanning signal Scan2, thereby realizing charge sharing between the first scanning signal Scan1 and the second scanning signal Scan2. This reduces the power consumption required for switching between the potentials of the first scanning signal Scan1 and the second scanning signal Scan2, thereby reducing the power consumption of the pixel driving circuit 100.

[0061] As can be understood, the so-called charge sharing means that during the switching between the high potential of the scanning signal and the low potential of the scanning signal, i.e., during the period when the first potential is switched to the second potential, the first potential and the second potential are short-circuited, so that the speed of the change from the first potential to the second potential is increased, and the speed of the change from the second potential to the first potential is also increased. When this frequency reaches a preset frequency value, the power consumption of the light-emitting unit can be effectively reduced.

[0062] 2 illustrates an example of the electrical connection relationship between circuits, and does not limit the number or physical locations of each component. Specifically, the first scanning signal Scan1 transmitted to the second transistor 12b and the first scanning signal Scan1 transmitted to the third transistor 14a may be provided by one signal controller or two signal controllers, respectively, and this application is not specifically limited thereto.

[0063] The second scanning signal Scan2 transmitted to the fifth transistor 22b and the second scanning signal Scan2 transmitted to the sixth transistor 24a may be provided by one signal controller or two signal controllers, respectively, and the present application is not specifically limited thereto.

[0064] In a specific embodiment of the present application, the signal short-circuit 50 may include multiple switch sub-circuits. If the first scanning signal Scan1 transmitted to the second transistor 12b and the first scanning signal Scan1 transmitted to the third transistor 14a are provided by one signal controller, and the second scanning signal Scan2 transmitted to the fifth transistor 22b and the second scanning signal Scan2 transmitted to the sixth transistor 24a are provided by another signal controller, the signal short-circuit 50 may include one switch sub-circuit. The switch sub-circuit includes a control end, a first end, and a second end. The control end of the switch sub-circuit is used to receive the third scanning signal Scan3, the first end of the switch sub-circuit is electrically connected to the control end of the second transistor 12b and the control end of the third transistor 14a, and the second end of the switch sub-circuit is electrically connected to the control end of the fifth transistor 22b and the control end of the sixth transistor 24a, thereby short-circuiting the first scanning signal Scan1 and the second scanning signal Scan2. The first driving module 10 and the second driving module 20 alternately supply the first voltage and the second voltage to the light-emitting unit 30, so that under the control of the first scanning signal Scan1 and the second scanning signal Scan2, the first driving module 10 and the second driving module 20 are alternately switched to supply voltages of opposite potentials to the light-emitting unit 30. Therefore, when the first scanning signal Scan1 and the second scanning signal Scan2 are short-circuited, the power consumption of switching between the potential of the first scanning signal Scan1 and the potential of the second scanning signal Scan2 can be effectively reduced.

[0065] For example, when switching from the first driving module 10 to the second driving module 20 to supply the first and second voltages to the light-emitting units 30, the first scanning signal Scan1 is at a first potential and the second scanning signal Scan2 is at a second potential. At this time, the first scanning signal Scan1 and the second scanning signal Scan2 are short-circuited, and the charge at the first potential from the first scanning signal Scan1 is transferred to the second scanning signal Scan2, thereby lowering the potential of the first scanning signal Scan1 and raising the potential of the second scanning signal Scan2, thereby effectively reducing the power consumption of the potential switching.

[0066] 2, in a specific embodiment of the present application, when the first scanning signal Scan1 transmitted to the second transistor 12b and the first scanning signal Scan1 transmitted to the third transistor 14a are provided by two signal controllers, respectively, and the second scanning signal Scan2 transmitted to the fifth transistor 22b and the second scanning signal Scan2 transmitted to the sixth transistor 24a are provided by another two signal controllers, respectively, the signal short-circuit 50 includes two switch subcircuits. The two switch subcircuits can be defined as a first switch subcircuit 52 and a second switch subcircuit 54, respectively. The first switch subcircuit 52 and the second switch subcircuit 54 each include a control end, a first end, and a second end.

[0067] Specifically, the control end of the first switch sub-circuit 52 is used to receive the third scan signal Scan3. The first end of the first switch sub-circuit 52 is electrically connected to the control end of the third transistor 14a. The second end of the first switch sub-circuit 52 is electrically connected to the control end of the sixth transistor 24a. The control end of the second switch sub-circuit 54 is used to receive the third scan signal Scan3. The first end of the second switch sub-circuit 54 is electrically connected to the control end of the fifth transistor 22b. The second end of the second switch sub-circuit 54 is electrically connected to the control end of the second transistor 12b.

[0068] The first driving module 10 and the second driving module 20 alternately supply the first voltage and the second voltage to the light-emitting unit 30, so that under the control of the first scanning signal Scan1 and the second scanning signal Scan2, the first driving module 10 and the second driving module 20 are alternately switched to supply voltages of opposite potentials to the light-emitting unit 30. Therefore, when the first scanning signal Scan1 and the second scanning signal Scan2 are short-circuited, the power consumption of switching between the potential of the first scanning signal Scan1 and the potential of the second scanning signal Scan2 can be effectively reduced.

[0069] In a specific embodiment of the present application, the first switch sub-circuit 52 may include a first shared transistor 52a, and the second switch sub-circuit 54 may include a second shared transistor 54a. The control terminal of the first shared transistor 52a is used to receive the third scan signal Scan3. The first terminal of the first shared transistor 52a is electrically connected to the control terminal of the third transistor 14a. The second terminal of the first shared transistor 52a is electrically connected to the control terminal of the sixth transistor 24a.

[0070] The control terminal of the second shared transistor 54a is used to receive the third scanning signal Scan3. The first terminal of the second shared transistor 54a is electrically connected to the control terminal of the fifth transistor 22b. The second terminal of the second shared transistor 54a is electrically connected to the control terminal of the second transistor 12b.

[0071] Referring to Fig. 3, Fig. 3 is a diagram showing the driving time sequence of the pixel driving circuit 100 shown in Fig. 2. As shown in Fig. 3, in the embodiment of the present application, the curve corresponding to the data signal Data is the time sequence of the data signal Data, the curve corresponding to the first scanning signal Scan1 is the time sequence of the first scanning signal Scan1, and the curve corresponding to the second scanning signal Scan2 is the time sequence of the second scanning signal Scan2.

[0072] As can be seen from the figure, the first scan signal Scan1 corresponds to two curves, which represent that in the pixel driving circuit 100, the first scan signal Scan1 transmitted to the second transistor 12b and the first scan signal Scan1 transmitted to the third transistor 14a are provided by two signal controllers, respectively. Therefore, there are two curves. Because the function of the first scan signal Scan1 is the same, the time sequence of the two curves is the same. Similarly, the second scan signal Scan2 corresponds to two curves, which represent that in the pixel driving circuit 100, the second scan signal Scan2 transmitted to the fifth transistor 22b and the second scan signal Scan2 transmitted to the sixth transistor 24a are provided by two signal controllers, respectively. Therefore, there are two curves. Because the function of the second scan signal Scan2 is the same, the time sequence of the two curves is the same.

[0073] In the embodiment of the present application, the magnitude of the data signal Data is used to adjust the magnitude of the current flowing through the light emitting element 31, i.e., to adjust the light emitting brightness of the light emitting element 31. The high and low potentials correspond to different light emitting brightness of the light emitting element 31.

[0074] As shown in FIG. 3, the first and second potentials of the first scanning signal Scan1 are opposite to the first and second potentials of the second scanning signal Scan2, which reflects that the first driving module 10 and the second driving module 20 alternately drive the light-emitting unit 30 to emit light.

[0075] As shown in FIG. 3, when the time sequence begins, the first driving module 10 drives the light-emitting unit 30 to emit light.

[0076] During the t1 period, the time at the left end of the t1 period indicates that the pixel driving circuit 100 is about to switch from the first driving module 10 to the second driving module 20 to drive the light-emitting unit 30 to emit light.

[0077] During the period t1, the signal short-circuiting circuit 50 shorts the first scanning signal Scan1 and the second scanning signal Scan2, enabling charge sharing between the first scanning signal Scan1 and the second scanning signal Scan2. As can be seen from the figure, at the right end of the period t1, the charge sharing between the first scanning signal Scan1 and the second scanning signal Scan2 is completed, and the potentials of the first scanning signal Scan1 and the second scanning signal Scan2 approach the midpoint between the first potential and the second potential.

[0078] During the period t2, both the first scanning signal Scan1 and the second scanning signal Scan2 are positioned close to the midpoint between the first potential and the second potential, and do not change.

[0079] During the period t3, the signal controller outputs the second scanning signal Scan2, causing the second scanning signal Scan2 to continuously increase to the first potential.

[0080] During the t4 period, when the second scanning signal Scan2 is at the first potential, the second driving module 20 drives the light emitting unit 30 to emit light, and the first scanning signal Scan1 is at the second potential.

[0081] Therefore, by controlling the potential status of the first scanning signal Scan1 transmitted to the first driving module 10 and the potential status of the second scanning signal Scan2 transmitted to the second driving module 20, the first driving module 10 and the second driving module 20 alternately drive the light-emitting unit 30 to emit light.

[0082] Based on the same idea, an embodiment of the present application further discloses a display panel, which includes a plurality of the pixel driving circuits 100 and a signal controller, which is used to provide a first scanning signal Scan1 and a second scanning signal Scan2 to the pixel driving circuits 100.

[0083] Based on the same idea, an embodiment of the present application further discloses a display device, which includes the above-mentioned display panel and a power supply module, and the power supply module is used to supply power to the display panel so that the display panel displays a screen.

[0084] As described above, in the pixel driving circuit 100, display panel, and display device of the present application, the pixel driving circuit 100 includes a first driving module 10 and a second driving module 20. The first driving module 10 includes a first light-emitting driving circuit 12 and a second light-emitting driving circuit 14, so that the first light-emitting driving circuit 12 applies a first voltage to a first terminal of the light-emitting element 31, and the second light-emitting driving circuit 14 applies a second voltage to a second terminal of the light-emitting element 31. The second driving module 20 includes a third light-emitting driving circuit 22 and a fourth light-emitting driving circuit 24, so that the third light-emitting driving circuit 22 applies a first voltage to a first terminal of the light-emitting element 31, and the fourth light-emitting driving circuit 24 applies a second voltage to a second terminal of the light-emitting element 31. By controlling the potential status of the first scanning signal Scan1 transmitted to the first driving module 10 and the potential status of the second scanning signal Scan2 transmitted to the second driving module 20, the first driving module 10 and the second driving module 20 alternately drive the light emitting units 30 to emit light. This allows the transistors of the first driving module 10 and the second driving module 20 to transmit voltage intermittently and use the intermittent periods to dissipate heat generated by the voltage transmission, thereby reducing the operating temperature of the transistors and improving the lifespan of the transistors, as well as the lifespan of the display panel and the display device.

[0085] Furthermore, the pixel driving circuit 100 is provided with a signal short-circuiting circuit 50. When switching between the first driving module 10 and the second driving module 20 to drive the light-emitting unit 30 to emit light, the signal short-circuiting circuit 50 short-circuits the first scanning signal Scan1 and the second scanning signal Scan2, thereby realizing charge sharing between the first scanning signal Scan1 and the second scanning signal Scan2. This reduces the power consumption required for switching between the potential of the first scanning signal Scan1 and the potential of the second scanning signal Scan2, thereby reducing the power consumption of the pixel driving circuit 100 and further effectively reducing the power consumption of the display panel and the display device.

[0086] All possible combinations of the technical features in the above embodiments are described. However, unless there is a contradiction in the combination of the technical features, all such combinations should be considered to be within the scope of the description of this specification.

[0087] In the description herein, the references "one embodiment," "some embodiments," "exemplary embodiments," "examples," "specific examples," or "some examples" mean that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the description herein, the use of the terms "exemplary" does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples, as appropriate.

[0088] It should be noted that the above embodiments only represent some embodiments of the present application, and the descriptions of the above embodiments are specific and detailed, but should not be understood as limiting the patent scope of the present application. Furthermore, without departing from the concept of the present application, those skilled in the art may make some modifications and improvements, and all such modifications and improvements should fall within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the appended claims.

Claims

1. A pixel driving circuit including a first driving module and a light-emitting unit, The pixel driving circuit further includes a second driving module, and the first driving module and the second driving module are both electrically connected to the light-emitting unit, a first power supply end, and a second power supply end; the first driving module receives a first scanning signal and a data signal, and selectively receives a first voltage from the first power supply end and a second voltage from the second power supply end according to the first scanning signal and the data signal; the second driving module receives a second scanning signal and the data signal, and selectively receives the second voltage from the first power supply end and the first voltage from the second power supply end according to the second scanning signal and the data signal; The first voltage and the second voltage received by the first driving module, and the first voltage and the second voltage received by the second driving module are alternately applied to both ends of the light emitting unit to drive the light emitting unit to emit light; 1. A pixel drive circuit comprising:

2. the first driving module includes a first light-emitting driving circuit and a second light-emitting driving circuit, a first end of the first light-emitting driving circuit is electrically connected to the first power supply end and is used to receive the first voltage from the first power supply end, and a second end of the first light-emitting driving circuit is electrically connected to the light-emitting unit; a first end of the second light-emitting driving circuit electrically connected to the light-emitting unit, and a second end of the second light-emitting driving circuit electrically connected to the second power supply end, and used to receive the second voltage from the second power supply end; 2. The pixel driving circuit according to claim 1.

3. the second driving module includes a third light-emitting driving circuit and a fourth light-emitting driving circuit, a first end of the third light-emitting driving circuit is electrically connected to the second power supply end and is used to receive the first voltage from the second power supply end, and a second end of the third light-emitting driving circuit is electrically connected to the light-emitting unit; a first end of the fourth light-emitting driving circuit electrically connected to the first power supply end and used to receive the second voltage from the first power supply end; and a second end of the fourth light-emitting driving circuit electrically connected to the light-emitting unit; 3. The pixel driving circuit according to claim 2.

4. The light-emitting unit includes a light-emitting element, the light-emitting element having a first end and a second end, and the first end and the second end of the light-emitting element are both electrically connected to the first driving module and the second driving module; 4. The pixel driving circuit according to claim 3.

5. the first light-emitting driving circuit comprises a first transistor and a second transistor, the second light-emitting driving circuit comprises a third transistor, a control end of the first transistor is used to receive the data signal, a first end of the first transistor is electrically connected to the first power supply end and is used to receive the first voltage from the first power supply end, a second end of the first transistor is electrically connected to the first end of the second transistor, a control end of the second transistor is used to receive the first scanning signal, and a second end of the second transistor is electrically connected to the first end of the light-emitting element; a control end of the third transistor is used to receive the first scanning signal, a first end of the third transistor is electrically connected to a second end of the light-emitting element, and a second end of the third transistor is electrically connected to the second power supply end and is used to receive the second voltage from the second power supply end; 5. The pixel driving circuit according to claim 4.

6. the third light-emitting driving circuit includes a fourth transistor and a fifth transistor, the fourth light-emitting driving circuit includes a sixth transistor, a control end of the fourth transistor is used to receive the data signal, a first end of the fourth transistor is electrically connected to the second power supply end and is used to receive the first voltage from the second power supply end, a second end of the fourth transistor is electrically connected to the first end of the fifth transistor, a control end of the fifth transistor is used to receive the second scanning signal, and a second end of the fifth transistor is electrically connected to the first end of the light-emitting element; a control end of the sixth transistor is used to receive the second scanning signal, a first end of the sixth transistor is electrically connected to a second end of the light-emitting element, and a second end of the sixth transistor is electrically connected to the first power supply end and is used to receive the second voltage from the first power supply end; 6. The pixel driving circuit according to claim 5.

7. When the control end of the first transistor receives the data signal and the first scanning signal is at a first potential, the first transistor, the second transistor and the third transistor are all in an on state, the first voltage is transmitted to a first end of the light emitting element through the first transistor and the second transistor, and the second voltage is transmitted to a second end of the light emitting element through the third transistor, and the light emitting element is driven by the first voltage and the second voltage to emit light; When the control end of the fourth transistor receives the data signal and the second scanning signal is at a first potential, the fourth transistor, the fifth transistor and the sixth transistor are all in an on state, the first voltage is transmitted to a first end of the light emitting element through the fourth transistor and the fifth transistor, and the second voltage is transmitted to a second end of the light emitting element through the sixth transistor, and the light emitting element is driven by the first voltage and the second voltage to emit light.

7. The pixel driving circuit according to claim 6.

8. the pixel driving circuit further comprises a signal short-circuit, the signal short-circuit including a plurality of switch sub-circuits, the switch sub-circuits electrically connected to the first driving module and the second driving module, and when switching between the first driving module and the second driving module to drive the light-emitting unit to emit light, the switch sub-circuits short-circuit the first scanning signal and the second scanning signal; 2. The pixel driving circuit according to claim 1.

9. A display panel comprising a signal controller and a plurality of pixel driving circuits according to any one of claims 1 to 8, The signal controller is used to provide a first scanning signal and a second scanning signal to the pixel driving circuit; A display panel characterized by:

10. A display device comprising a power supply module and the display panel according to claim 9, the power supply module is used to supply power to the display panel; A display device characterized by:

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