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 scan signal (Scan1) and a data signal (Date), and, depending on the first scan signal (Scan1) and the data signal (Date), optionally receives a first voltage from a first power terminal (Vodd) and a second voltage from a second power terminal (Veven). A second driving module (20) receives a second scan signal (Scan2) and a data signal (Date), and, depending on the second scan signal (Scan2) and the data signal (Date), optionally receives a second voltage from a first power terminal (Vodd) and a first voltage from a second power terminal (Veven). 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. Since each driving component within the pixel driving circuit (100) can operate intermittently using AC driving, it is advantageous for the driving component to release heat generated during operation in a timely manner, and the operating temperature of the driving component can be effectively lowered and the service life extended.

Description

Technology Field

[0001] (Related Application)

[0002] This application claims priority to a Chinese patent application filed with the Chinese Intellectual Property Office on October 12, 2022, with application number 202211248819.0 and title of invention "Pixel driving circuit, display panel and display device", all contents of said application are incorporated herein by reference.

[0003] The present application relates to the field of display technology, and in particular to a pixel driving circuit, a display panel having said pixel driving circuit, and a display device having said display panel. Background Technology

[0004] Micro Light Emitting Diodes (Micro LEDs) are next-generation display technologies that are thinner and lighter, and have advantages such as high brightness, low power consumption, fast response, high clarity, excellent flexibility, high luminous efficiency, and high contrast ratio. As they can satisfy new consumer demands for display technology, they are widely applied in various display devices such as Micro LED display panels and Organic Light Emitting Diode (OLED) display panels.

[0005] However, conventional Micro LED or OLED display panels generally use DC driving, and this DC driving method increases the operating temperature of the driving transistors in the pixel driving circuit, significantly shortening the lifespan of the driving transistors and increasing the overall power consumption of the display panel. The problem to be solved

[0006] Taking into account the disadvantages of the prior art, the present application aims to provide a pixel driving circuit, a display panel, and a display device. Each transistor of the pixel driving circuit can intermittently transmit voltage, and by dissipating the heat generated by voltage transmission using intermittent times, the operating temperature of each transistor is lowered, which is advantageous for extending the service life of each transistor. means of solving the problem

[0007] In a first aspect, the present application provides a pixel driving circuit comprising a first driving module, a light-emitting unit, and a second driving module, wherein the first driving module and the second driving module are both electrically connected to a light-emitting unit, a first power terminal, and a second power terminal, and

[0008] The first driving module receives a first scan signal and a data signal, and depending on the first scan signal and the data signal, selectively receives a first voltage from a first power terminal and a second voltage from a second power terminal, and

[0009] The second driving module receives a second scan signal and a data signal, and depending on the second scan signal and the data signal, selectively receives a second voltage from a first power terminal and receives a first voltage from a second power terminal, and

[0010] 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.

[0011] In some embodiments, the first driving module includes a first light-emitting driving circuit and a second light-emitting driving circuit, wherein a first terminal of the first light-emitting driving circuit is electrically connected to a first power terminal to receive the first voltage from the first power terminal, a second terminal of the first light-emitting driving circuit is electrically connected to a light-emitting unit, a first terminal of the second light-emitting driving circuit is electrically connected to a light-emitting unit, and a second terminal of the second light-emitting driving circuit is electrically connected to the second power terminal to receive the second voltage from the second power terminal.

[0012] In some embodiments, the second driving module includes a third light-emitting driving circuit and a fourth light-emitting driving circuit, the first terminal of the third light-emitting driving circuit is electrically connected to a second power terminal to receive a first voltage from the second power terminal, the second terminal of the third light-emitting driving circuit is electrically connected to a light-emitting unit, the first terminal of the fourth light-emitting driving circuit is electrically connected to a first power terminal to receive a second voltage from the first power terminal, and the second terminal of the fourth light-emitting driving circuit is electrically connected to a light-emitting unit.

[0013] In some embodiments, the light-emitting unit includes a light-emitting element, and the light-emitting element includes a first terminal and a second terminal, and the first terminal and the second terminal of the light-emitting element are both electrically connected to a first driving module and a second driving module.

[0014] In some embodiments, the first light-emitting driving circuit includes a first transistor and a second transistor, and the second light-emitting driving circuit includes a third transistor, the control terminal of the first transistor receives a data signal, the first terminal of the first transistor is electrically connected to a first power terminal to receive a first voltage from the first power terminal, the second terminal of the first transistor is electrically connected to a first terminal of the second transistor, the control terminal of the second transistor receives a first scan signal, and the second terminal of the second transistor is electrically connected to a first terminal of a light-emitting element;

[0015] The control terminal of the third transistor receives a first scan signal, the first terminal of the third transistor is electrically connected to the second terminal of the light-emitting element, and the second terminal of the third transistor is electrically connected to the second power terminal to receive a second voltage from the second power terminal.

[0016] In some embodiments, the third light-emitting driving circuit includes a fourth transistor and a fifth transistor, and the fourth light-emitting driving circuit includes a sixth transistor, the control terminal of the fourth transistor receives a data signal, the first terminal of the fourth transistor is electrically connected to a second power terminal to receive a first voltage from the second power terminal, the second terminal of the fourth transistor is electrically connected to the first terminal of the fifth transistor, the control terminal of the fifth transistor receives a second scan signal, and the second terminal of the fifth transistor is electrically connected to the first terminal of the light-emitting element;

[0017] The control terminal of the sixth transistor receives a second scan signal, the first terminal of the sixth transistor is electrically connected to the second terminal of the light-emitting element, and the second terminal of the sixth transistor is electrically connected to the first power terminal to receive a second voltage from the first power terminal.

[0018] In some embodiments, when the control terminal of the first transistor receives a data signal and the first scan signal is at the first potential, the first transistor, the second transistor, and the third transistor are all in the ON state, the first voltage is transmitted to the first terminal of the light-emitting element through the first transistor and the second transistor, the second voltage is transmitted to the second terminal of the light-emitting element through the third transistor, and the light-emitting element emits light under the driving of the first voltage and the second voltage.

[0019] When the control terminal of the fourth transistor receives a data signal and the second scan signal is at the first potential, the fourth transistor, the fifth transistor, and the sixth transistor are all in the ON state, the first voltage is transmitted to the first terminal of the light-emitting element through the fourth transistor and the fifth transistor, the second voltage is transmitted to the second terminal of the light-emitting element through the sixth transistor, and the light-emitting element emits light under the driving of the first voltage and the second voltage.

[0020] In some embodiments, the pixel driving circuit further includes a signal short circuit, and the signal short circuit includes a plurality of switch subcircuits, and the switch subcircuits are electrically connected to both a first driving module and a second driving module, and when driving the light emission of a light-emitting unit by performing switching between the first driving module and the second driving module, the switch subcircuits short-circuit the first scan signal and the second scan signal.

[0021] In a second aspect, the present application provides a display panel, the display panel comprises a signal controller and a plurality of pixel driving circuits, and the signal controller provides a first scan signal and a second scan signal to the pixel driving circuits.

[0022] In a third aspect, the present application provides a display device, the display device comprises a power module and a display panel, and the power module supplies power to the display panel. Effects of the invention

[0023] As described above, in the pixel driving circuit, display panel, and display device of the present application, a first driving module and a second driving module are installed in the pixel driving circuit, and a first light-emitting driving circuit and a second light-emitting driving circuit are installed in the first driving module, and the first light-emitting driving circuit applies a first voltage to a light-emitting element, and the second light-emitting driving circuit applies a second voltage to a light-emitting element.

[0024] A third light-emitting driving circuit and a fourth light-emitting driving circuit are installed in the second driving module, and 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 conditions of the first scan signal transmitted to the first driving module and the second scan signal transmitted to the second driving module, the first driving module and the second driving module alternately drive the light-emitting unit to emit light. Accordingly, each transistor of the first driving module and the second driving module can intermittently transmit voltage, and by discharging the amount of heat generated by voltage transmission using intermittent times, the operating temperature of each transistor is lowered, which is advantageous for extending the service life of each transistor and further extending the service life of the display panel and display device.

[0025] In addition, when a signal short circuit is installed in the pixel driving circuit and switching is performed between the first driving module and the second driving module to drive the light emission of the light-emitting unit, the signal short circuit shorts the first scan signal and the second scan signal to realize charge sharing between the first scan signal and the second scan signal. Accordingly, the power consumption required for potential switching of the first scan signal and the second scan signal is reduced, and the power consumption of the pixel driving circuit is reduced, thereby effectively reducing the power consumption of the display panel and the display device. Brief explanation of the drawing

[0026] To more clearly explain the technical solution according to the embodiments of the present application, the accompanying drawings necessary for explaining the embodiments are briefly introduced below. It is obvious that the accompanying drawings exemplified below are merely some embodiments of the present application, and that those skilled in the art can obtain other drawings based on these drawings without creative effort. FIG. 1 is a schematic diagram of the circuit structure of a pixel driving circuit disclosed in an embodiment of the present application. Figure 2 is a schematic diagram of the specific circuit structure of the pixel driving circuit shown in Figure 1. Figure 3 is a driving time sequence diagram of the pixel driving circuit shown in Figure 2. Specific details for implementing the invention

[0027] To facilitate a better understanding of the present application, the application will be described more comprehensively below with reference to the associated drawings. The attached drawings disclose preferred embodiments of the present application. However, the present application is not limited to the embodiments described herein and may be realized in various forms. Conversely, the purpose of providing such embodiments is to enable a more comprehensive understanding of the disclosed contents of the present application.

[0028] The description of each embodiment below refers to the attached drawings and is used to illustrate specific embodiments of the present application that are feasible. In the text, part numbers, such as "first," "second," etc., are used solely to distinguish the objects being described and do not imply any order or technical significance. Unless otherwise specified, terms such as "connection" and "joint" mentioned in this application include direct connection (joint) or indirect connection (joint). Directional terms mentioned in this application, such as "up," "down," "front," "back," "left," "right," "inside," "outside," and "side," are merely directions indicated based on the drawings; therefore, the use of directional terms is intended to better describe and more clearly explain and understand this application, and does not specify or imply that a device or component must have a specific direction or must be configured or operated in a specific direction, and thus should not be understood as limiting this application.

[0029] It must be explained in the description of this application that, unless otherwise explicitly defined or limited, the terms "mounting," "connection," and "joining" should be understood in a broad sense. For example, they may be fixed connections, detachable connections, integral connections, mechanical connections, direct connections, indirect connections using an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meaning of the aforementioned terms in this application according to the specific circumstances. It must be explained that terms such as "first," "second," etc., as used in the specification, claims, and drawings of this application are used to distinguish different objects rather than to describe a specific order. Furthermore, the terms "comprehensively," "can be comprehensively," "include," and "can be included" used in this application indicate the existence of disclosed functions, operations, elements, etc., and do not limit one or more other functions, operations, elements, etc. Additionally, the terms “comprising” or “including” indicate the existence of corresponding features, quantities, steps, operations, elements, parts, or combinations thereof disclosed in the description, and do not exclude the existence or addition of one or more other features, quantities, steps, operations, elements, parts, or combinations thereof, and are intended to cover non-exclusive inclusion. Furthermore, unless otherwise clearly specified, the meaning of “at least one” as used in the text is one or more, e.g., one, two, or three, and the meaning of “multiple” is at least two, e.g., two or three. Terms such as “step 1,” “step 2,” etc., as used in the specification, claims, and drawings of this application are used to distinguish different objects rather than to describe a specific order.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art. The terms used in this document, i.e., in the specification of this application, are intended to describe specific embodiments and are not intended to limit this application.

[0031] Referring to FIG. 1, FIG. 1 is a schematic diagram of 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) provided in an embodiment of the present application includes a first driving module (10), a second driving module (20), and a light-emitting unit (30). Here, the first driving module (10) and the second driving module (20) are both electrically connected to the light-emitting unit (30), a first power terminal (Vodd), and a second power terminal (Veven).

[0032] The first driving module (10) receives a first scan signal (Scan1) and a data signal (Data), and, depending on the first scan signal (Scan1) and the data signal (Data), selectively receives a first voltage from the first power terminal (Vodd) and a second voltage from the second power terminal (Veven). The second driving module (20) receives a second scan signal (Scan2) and a data signal (Data), and, depending on the second scan signal (Scan2) and the data signal (Data), selectively receives a second voltage from the first power terminal (Vodd) and a first voltage from the second power terminal (Veven).

[0033] 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 emission of the light-emitting unit (30).

[0034] In an embodiment of the present application, by installing a first driving module (10) and a second driving module (20) to alternately drive the light-emitting unit (30) to emit light, the driving component in the first driving module (10) and the driving component in the second driving module (20) can operate intermittently using AC driving, which is advantageous for releasing heat generated during operation of the driving component in a timely manner, and can effectively lower the operating temperature of the driving component and extend its service life.

[0035] Referring together with FIG. 2, FIG. 2 is a schematic diagram of the specific circuit structure of the pixel driving circuit (100) illustrated in FIG. 1. In an embodiment of the present application, the light-emitting unit (30) may include a light-emitting element (31), and the light-emitting element (31) includes a first terminal and a second terminal, and both the first terminal and the second terminal of the light-emitting element (31) are 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) drive the light emission of the light-emitting element (31) by applying a first voltage and a second voltage to both ends of the light-emitting element (31).

[0036] In a specific embodiment of the present application, the first terminal of the light-emitting element (31) may be an anode and the second terminal of the light-emitting element (31) may be a cathode, and the present application is not specifically limited thereto.

[0037] 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.

[0038] In an 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) provides a first voltage to the light-emitting unit (30), and the second light-emitting driving circuit (14) provides a second voltage to the light-emitting unit (30).

[0039] Here, the first terminal of the first light-emitting driving circuit (12) is electrically connected to the first power terminal (Vodd) to receive a first voltage from the first power terminal (Vodd), and the second terminal of the first light-emitting driving circuit (12) is electrically connected to the light-emitting unit (30). When the first light-emitting driving circuit (12) receives a data signal (Data) and a first scan signal (Scan1) having a first potential, the first voltage is transmitted to the light-emitting unit (30) through the first light-emitting driving circuit (12). Specifically, the first voltage is transmitted to the first terminal of the light-emitting element (31) through the first light-emitting driving circuit (12).

[0040] The first terminal of the second light-emitting driving circuit (14) is electrically connected to the light-emitting unit (30), and the second terminal of the second light-emitting driving circuit (14) is electrically connected to the second power terminal (Veven) to receive a second voltage from the second power terminal (Veven). When the second light-emitting driving circuit (14) receives a data signal (Data) and a first scan signal (Scan1) having a first potential, the second voltage is transmitted to the light-emitting unit (30) via the second light-emitting driving circuit (14). Specifically, the second voltage is transmitted to the second terminal of the light-emitting element (31) via the second light-emitting driving circuit (14).

[0041] At this time, the first voltage is transmitted to the first terminal of the light-emitting element (31) through the first light-emitting driving circuit (12), and the second voltage is transmitted to the second terminal of the light-emitting element (31) through the second light-emitting driving circuit (14), and the first voltage and the second voltage applied to the light-emitting element (31) can drive the light emission of the light-emitting element (31).

[0042] As illustrated 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) that receive a first voltage from a first power terminal (Vodd) and selectively transmit the first voltage to a light-emitting unit (30). The first transistor (12a) and the second transistor (12b) are connected in series between the first power terminal (Vodd) and the first terminal of the light-emitting element (31). Specifically, both the first transistor (12a) and the second transistor (12b) include a control terminal, a first terminal, and a second terminal. The control terminal of the first transistor (12a) receives a data signal (Data), and the first terminal of the first transistor (12a) is electrically connected to the first power terminal (Vodd) to receive a first voltage from the first power 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) receives the first scan signal (Scan1), and the second terminal of the second transistor (12b) is electrically connected to the first terminal of the light-emitting element (31).

[0043] When the control terminal of the first transistor (12a) receives a data signal (Data) and the first scan signal (Scan1) is at the first potential, both the first transistor (12a) and the second transistor (12b) are in the ON state, and the first voltage is transmitted to the first terminal of the light-emitting element (31) through the first transistor (12a) and the second transistor (12b).

[0044] When the control terminal of the first transistor (12a) receives a data signal (Data) and the first scan signal (Scan1) is at the second potential, the first transistor (12a) is in the ON state and the second transistor (12b) is in the OFF state. The first voltage cannot be transmitted to the first terminal of the light-emitting element (31) through the first transistor (12a) and the second transistor (12b).

[0045] In a specific embodiment of the present application, the second light-emitting driving circuit (14) may include a third transistor (14a), and the third transistor (14a) includes a control terminal, a first terminal and a second terminal, the control terminal of the third transistor (14a) receives a first scan signal (Scan1), the first terminal of the third transistor (14a) is electrically connected to the second terminal of the light-emitting element (31), and the second terminal of the third transistor (14a) is electrically connected to the second power terminal (Veven) to receive a second voltage from the second power terminal (Veven).

[0046] When the first scan signal (Scan1) received by the third transistor (14a) is at the first potential, the third transistor (14a) is in the ON state, and the second voltage is transmitted through the third transistor (14a) to the second terminal of the light-emitting element (31).

[0047] When the first scan signal (Scan1) received by the third transistor (14a) is at the second potential, the third transistor (14a) is in the off state, and the second voltage cannot be transmitted through the third transistor (14a) to the second terminal of the light-emitting element (31).

[0048] As illustrated in FIG. 2, in an 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) provides a first voltage to the light-emitting unit (30), and the fourth light-emitting driving circuit (24) provides a second voltage to the light-emitting unit (30).

[0049] Here, the first terminal of the third light-emitting driving circuit (22) is electrically connected to the second power terminal (Veven) to receive a first voltage from the second power terminal (Veven), and the second terminal 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 a data signal (Data) and a second scan signal (Scan2) having a first potential, the first voltage is transmitted to the light-emitting unit (30) via the third light-emitting driving circuit (22). Specifically, the first voltage is transmitted to the first terminal of the light-emitting element (31) via the third light-emitting driving circuit (22).

[0050] The first terminal of the fourth light-emitting driving circuit (24) is electrically connected to the first power terminal (Vodd) to receive a second voltage from the first power terminal (Vodd), and the second terminal of the fourth light-emitting driving circuit (24) is electrically connected to the light-emitting unit (30). When the fourth light-emitting driving circuit (24) receives a data signal (Data) and a second scan signal (Scan2) having a first potential, the second voltage is transmitted to the light-emitting unit (30) via the fourth light-emitting driving circuit (24). Specifically, the second voltage is transmitted to the second terminal of the light-emitting element (31) via the fourth light-emitting driving circuit (24).

[0051] 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 first voltage and the second voltage applied to the light-emitting element (31) can drive the light emission of the light-emitting element (31).

[0052] As illustrated 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) that receive a first voltage from a second power terminal (Veven) and selectively transmit the first voltage to a light-emitting unit (30). The fourth transistor (22a) and the fifth transistor (22b) are connected in series between the second power terminal (Veven) and the first terminal of the light-emitting element (31). Specifically, both the fourth transistor (22a) and the fifth transistor (22b) include a control terminal, a first terminal, and a second terminal. Here, the control terminal of the fourth transistor (22a) receives a data signal (Data), and the first terminal of the fourth transistor (22a) is electrically connected to the second power terminal (Veven) to receive a first voltage from the second power 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) receives the second scan signal (Scan2), and the second terminal of the fifth transistor (22b) is electrically connected to the first terminal of the light-emitting element (31).

[0053] When the control terminal of the fourth transistor (22a) receives a data signal (Data) and the second scan signal (Scan2) is at the first potential, both the fourth transistor (22a) and the fifth transistor (22b) are in the ON state, and the first voltage is transmitted to the first terminal of the light-emitting element (31) through the fourth transistor (22a) and the fifth transistor (22b).

[0054] When the control terminal of the fourth transistor (22a) receives a data signal (Data) and the second scan signal (Scan2) is at the second potential, the fourth transistor (22a) is in the ON state and the fifth transistor (22b) is in the OFF state, and the first voltage cannot be transmitted to the first terminal of the light-emitting element (31) through the fourth transistor (22a) and the fifth transistor (22b).

[0055] As illustrated in FIG. 2, in a specific embodiment of the present application, the fourth light-emitting driving circuit (24) may include a sixth transistor (24a), and the sixth transistor (24a) includes a control terminal, a first terminal and a second terminal, the control terminal of the sixth transistor (24a) receives a second scan signal (Scan2), the first terminal of the sixth transistor (24a) is electrically connected to the second terminal of the light-emitting element (31), and the second terminal of the sixth transistor (24a) is electrically connected to the first power terminal (Vodd) to receive a second voltage from the first power terminal (Vodd).

[0056] When the second scan signal (Scan2) received by the sixth transistor (24a) is at the first potential, the sixth transistor (24a) is in the ON state, and the second voltage is transmitted through the sixth transistor (24a) to the second terminal of the light-emitting element (31).

[0057] When the second scan signal (Scan2) received by the sixth transistor (24a) is at the second potential, the sixth transistor (24a) is in the off state, and the second voltage cannot be transmitted through the sixth transistor (24a) to the second terminal of the light-emitting element (31).

[0058] In an embodiment of the present application, the first transistor (12a), the second transistor (12b), the third transistor (14a), the fourth transistor (22a), the fifth transistor (22b), and the sixth transistor (24a) may all be Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs), abbreviated as MOS transistors. Specifically, the first transistor (12a), the second transistor (12b), the third transistor (14a), the fourth transistor (22a), the fifth transistor (22b), and the sixth transistor (24a) may be N-type MOS transistors or P-type transistors, and the present application is not specifically limited thereto.

[0059] In an embodiment of the present application, the first terminal may be the drain (D) of each transistor, the second terminal may be the source (S) of each transistor, and the control terminal may be the gate (G) of each transistor, and the present application is not specifically limited thereto.

[0060] In the embodiments 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 does not specifically limit these.

[0061] In an embodiment of the present application, a first driving module (10) and a second driving module (20) are installed, and a first light-emitting driving circuit (12) and a second light-emitting driving circuit (14) are installed in the first driving module (10), so that the first light-emitting driving circuit (12) applies a first voltage to the first terminal of the light-emitting element (31), and the second light-emitting driving circuit (14) applies a second voltage to the second terminal of the light-emitting element (31). A third light-emitting driving circuit (22) and a fourth light-emitting driving circuit (24) are installed in the second driving module (20), so that the third light-emitting driving circuit (22) applies a first voltage to the first terminal of the light-emitting element (31), and the fourth light-emitting driving circuit (24) applies a second voltage to the second terminal of the light-emitting element (31). By controlling the potential conditions of the first scan signal (Scan1) transmitted to the first driving module (10) and the second scan signal (Scan2) transmitted to the second driving module (20), the first driving module (10) and the second driving module (20) alternately apply the first voltage and the second voltage to the light-emitting element (31), thereby driving the light emission of the light-emitting unit (30). Each transistor of the first driving module (10) and the second driving module (20) is enabled to intermittently transmit voltage, and by discharging the amount of heat generated by voltage transmission using intermittent times, the operating temperature of each transistor is lowered. Furthermore, the lifespan of each transistor is extended.

[0062] In an embodiment of the present application, when the control terminal of the first transistor (12a) receives a data signal (Data) and the first scan signal (Scan1) is at the first potential, the first power terminal (Vodd) transmits the first voltage and the second power terminal (Veven) transmits the second voltage. When the control terminal of the fourth transistor (22a) receives a data signal (Data) and the second scan signal (Scan2) is at the first potential, the first power terminal (Vodd) transmits the second voltage and the second power terminal (Veven) transmits the first voltage.

[0063] Referring to FIG. 1 and FIG. 2 together, the operation process of the pixel driving circuit (100) is then described in general.

[0064] When the control terminal of the first transistor (12a) receives a data signal (Data) and the first scan signal (Scan1) is at the first potential, the first transistor (12a), the second transistor (12b), and the third transistor (14a) are all in the ON state, and the first voltage is transmitted to the first terminal 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 terminal of the light-emitting element (31) through the third transistor (14a). At this time, the light-emitting element (31) is driven by the first driving module (10) and emits light.

[0065] When the control terminal of the fourth transistor (22a) receives a data signal (Data) and the second scan signal (Scan2) is at the first potential, the fourth transistor (22a), the fifth transistor (22b), and the sixth transistor (24a) are all in the ON state, and the first voltage is transmitted to the first terminal 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 terminal of the light-emitting element (31) through the sixth transistor (24a). At this time, the light-emitting element (31) is driven by the second driving module (20) and emits light.

[0066] As the potential of the first scan signal (Scan1) and the potential of the second scan signal (Scan2) are switched, the first driving module (10) and the second driving module (20) alternately drive the light-emitting unit (30) to emit light.

[0067] As illustrated in FIG. 2, in one embodiment of the present application, the pixel driving circuit (100) may further include a signal short circuit (50), and the signal short circuit (50) is electrically connected to both the first driving module (10) and the second driving module (20). When driving the light emission of the light-emitting unit (30) by performing switching between the first driving module (10) and the second driving module (20), the signal short circuit (50) short-circuits the first scan signal (Scan1) and the second scan signal (Scan2) to realize charge sharing between the first scan signal (Scan1) and the second scan signal (Scan2). This can further reduce the power consumption required for potential switching of the first scan signal (Scan1) and the second scan signal (Scan2), thereby reducing the power consumption of the pixel driving circuit (100).

[0068] So-called charge sharing is short-circuiting the first potential and the second potential while the scan signal is switching between a high level and a low level, that is, while the first potential is switching to the second potential. In this case, the speed at which the first potential changes to the second potential increases, and at the same time, the speed at which the second potential changes to the first potential also increases, and when this frequency reaches a preset frequency value, it can be understood that the light-emitting unit can effectively save power consumption.

[0069] It should be explained that FIG. 2 is merely an exemplary representation of the electrical connection relationships between circuits and does not limit the quantity and physical location of each component. Specifically, the first scan signal (Scan1) transmitted to the second transistor (12b) and the third transistor (14a) may be provided by a single signal controller or by two signal controllers respectively, and the present application does not specifically limit this.

[0070] The second scan signal (Scan2) transmitted to the fifth transistor (22b) and the sixth transistor (24a) may be provided by a single signal controller or by two signal controllers respectively, and the present application does not specifically limit this.

[0071] In a specific embodiment of the present application, the signal short circuit (50) may include a plurality of switch subcircuits. When a first scan signal (Scan1) transmitted to the second transistor (12b) and the third transistor (14a) is provided by one signal controller, and a second scan signal (Scan2) transmitted to the fifth transistor (22b) and the sixth transistor (24a) is provided by another signal controller, the signal short circuit (50) includes one switch subcircuit, and the switch subcircuit includes a control terminal, a first terminal, and a second terminal. The control terminal of the switch subcircuit receives the third scan signal (Scan3), the first terminal of the switch subcircuit is electrically connected to the control terminal of the second transistor (12b) and the control terminal of the third transistor (14a), and the second terminal of the switch subcircuit is electrically connected to the control terminal of the fifth transistor (22b) and the control terminal of the sixth transistor (24a), thereby short-circuiting the first scan signal (Scan1) and the second scan signal (Scan2). Since the first driving module (10) and the second driving module (20) alternately provide the first voltage and the second voltage to the light-emitting unit (30), the potentials when the first driving module (10) and the second driving module (20) are alternately switched to provide voltage to the light-emitting unit (30) under the control of the first scan signal (Scan1) and the second scan signal (Scan2) are opposite to each other, so when the first scan signal (Scan1) and the second scan signal (Scan2) are short-circuited, power consumption due to potential switching of the first scan signal (Scan1) and the second scan signal (Scan2) can be effectively reduced.

[0072] For example, when the first driving module (10) is switched to the second driving module (20) and is prepared to provide a first voltage and a second voltage to the light-emitting unit (30), the first scan signal (Scan1) is at a first potential and the second scan signal (Scan2) is at a second potential. At this time, the first scan signal (Scan1) and the second scan signal (Scan2) are short-circuited, and the first scan signal (Scan1) transfers the charge at the first potential to the second scan signal (Scan2), thereby decreasing the potential of the first scan signal (Scan1) and increasing the potential of the second scan signal (Scan2), effectively reducing power consumption due to potential switching.

[0073] As illustrated in FIG. 2, in a specific embodiment of the present application, when a first scan signal (Scan1) transmitted to a second transistor (12b) and a first scan signal (Scan1) transmitted to a third transistor (14a) are each provided by two signal controllers, and a second scan signal (Scan2) transmitted to a fifth transistor (22b) and a second scan signal (Scan2) transmitted to a sixth transistor (24a) are each provided by two other signal controllers, the signal short circuit (50) includes two switch subcircuits, which can be defined as a first switch subcircuit (52) and a second switch subcircuit (54), and both the first switch subcircuit (52) and the second switch subcircuit (54) include a control terminal, a first terminal, and a second terminal.

[0074] Specifically, the control terminal of the first switch sub-circuit (52) receives the third scan signal (Scan3), the first terminal of the first switch sub-circuit (52) is electrically connected to the control terminal of the third transistor (14a), and the second terminal of the first switch sub-circuit (52) is electrically connected to the control terminal of the sixth transistor (24a). The control terminal of the second switch sub-circuit (54) receives the third scan signal (Scan3), the first terminal of the second switch sub-circuit (54) is electrically connected to the control terminal of the fifth transistor (22b), and the second terminal of the second switch sub-circuit (54) is electrically connected to the control terminal of the second transistor (12b).

[0075] Since the first driving module (10) and the second driving module (20) alternately provide the first voltage and the second voltage to the light-emitting unit (30), the potentials when the first driving module (10) and the second driving module (20) are alternately switched to provide voltage to the light-emitting unit (30) under the control of the first scan signal (Scan1) and the second scan signal (Scan2) are opposite to each other, so when the first scan signal (Scan1) and the second scan signal (Scan2) are short-circuited, power consumption due to potential switching of the first scan signal (Scan1) and the second scan signal (Scan2) can be effectively reduced.

[0076] In a specific embodiment of the present application, the first switch subcircuit (52) may include a first shared transistor (52a), and the second switch subcircuit (54) may include a second shared transistor (54a). The control terminal of the first shared transistor (52a) receives a 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), and the second terminal of the first shared transistor (52a) is electrically connected to the control terminal of the sixth transistor (24a).

[0077] The control terminal of the second shared transistor (54a) receives the third scan signal (Scan3), the first terminal of the second shared transistor (54a) is electrically connected to the control terminal of the fifth transistor (22b), and the second terminal of the second shared transistor (54a) is electrically connected to the control terminal of the second transistor (12b).

[0078] Referring together with FIG. 3, FIG. 3 is a driving time sequence diagram of the pixel driving circuit (100) illustrated in FIG. 2. As illustrated in FIG. 3, in an 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 scan signal (Scan1) is the time sequence of the first scan signal (Scan1), and the curve corresponding to the second scan signal (Scan2) is the time sequence of the second scan signal (Scan2).

[0079] As can be seen from the drawing, the first scan signal (Scan1) corresponds to two curves, that is, since the first scan signal (Scan1) transmitted from the pixel driving circuit (100) to the second transistor (12b) and the third transistor (14a) is provided by two signal controllers respectively, there are two curves, but since the function of the first scan signal (Scan1) is the same, the time sequence of the two curves is the same. The second scan signal (Scan2) corresponds to two curves, that is, since the second scan signal (Scan2) transmitted from the pixel driving circuit (100) to the fifth transistor (22b) and the sixth transistor (24a) is provided by two signal controllers respectively, there are two curves, but since the function of the second scan signal (Scan2) is the same, the time sequence of the two curves is the same.

[0080] In an embodiment of the present application, the magnitude of the data signal (Data) corresponds to the magnitude of the current flowing through the light-emitting element (31), that is, it controls the luminous brightness of the light-emitting element (31). The high and low potential corresponds to different luminous brightness of the light-emitting element (31).

[0081] As illustrated in FIG. 3, the case where the first scan signal (Scan1) is at the first potential and the second potential and the case where the second scan signal (Scan2) is at the first potential and the second potential are opposite to each other, that is, reflecting that the first driving module (10) and the second driving module (20) alternately drive the light-emitting unit (30) to emit light.

[0082] As shown in FIG. 3, a clock sequence is started, and the light-emitting unit (30) is driven by the first driving module (10) to emit light.

[0083] During the t1 period, the time of the left end point of the t1 period indicates that the pixel driving circuit (100) is switched from the first driving module (10) to the second driving module (20) to drive the light emission of the light-emitting unit (30).

[0084] During period t1, the signal short circuit (50) shorts the first scan signal (Scan1) and the second scan signal (Scan2) to realize charge sharing between the first scan signal (Scan1) and the second scan signal (Scan2). As can be seen from the drawing, at the time of the right end point of period t1, the first scan signal (Scan1) and the second scan signal (Scan2) complete charge sharing, and the potential of both approaches the intermediate position between the first potential and the second potential.

[0085] During the entire t2 period, the first scan signal (Scan1) and the second scan signal (Scan2) both do not change at a position approaching the intermediate position between the first potential and the second potential.

[0086] During the period t3, the signal controller outputs a second scan signal (Scan2) so that the second scan signal (Scan2) continuously rises to the first potential.

[0087] During the period t4, when the second scan signal (Scan2) is at the first potential, the second driving module (20) drives the light-emitting unit (30) to emit light. At this time, the first scan signal (Scan1) is at the second potential.

[0088] Accordingly, by controlling the potential condition of the first scan signal (Scan1) transmitted to the first driving module (10) and the potential condition of the second scan 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.

[0089] Based on the same concept, the present application also discloses a display panel, the display panel comprising a plurality of the above-described pixel driving circuits (100) and a signal controller. The signal controller provides a first scan signal (Scan1) and a second scan signal (Scan2) to the pixel driving circuits (100).

[0090] Based on the same concept, the present application also discloses a display device, the display device comprising the above-described display panel and power module, wherein the power module supplies power to the display panel so that the display panel displays a screen.

[0091] As described above, in the pixel driving circuit (100), display panel, and display device of the present application, a first driving module (10) and a second driving module (20) are installed in the pixel driving circuit (100). A first light-emitting driving circuit (12) and a second light-emitting driving circuit (14) are installed in the first driving module (10), so that the first light-emitting driving circuit (12) applies a first voltage to a first terminal of a light-emitting element (31), and the second light-emitting driving circuit (14) applies a second voltage to a second terminal of a light-emitting element (31). A third light-emitting driving circuit (22) and a fourth light-emitting driving circuit (24) are installed in the second driving module (20), so that the third light-emitting driving circuit (22) applies a first voltage to a first terminal of a light-emitting element (31), and the fourth light-emitting driving circuit (24) applies a second voltage to a second terminal of a light-emitting element (31). By controlling the potential condition of the first scan signal (Scan1) transmitted to the first driving module (10) and the potential condition of the second scan 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. Accordingly, each transistor of the first driving module (10) and the second driving module (20) can intermittently transmit voltage, and by discharging the amount of heat generated by voltage transmission using intermittent times, the operating temperature of each transistor is lowered, which is advantageous for extending the lifespan of each transistor and further extending the lifespan of the display panel and display device.

[0092] Additionally, when a signal short circuit (50) is installed in the pixel driving circuit (100) and switching is performed 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 scan signal (Scan1) and the second scan signal (Scan2) to realize charge sharing between the first scan signal (Scan1) and the second scan signal (Scan2). Accordingly, the power consumption required for potential switching of the first scan signal (Scan1) and the second scan signal (Scan2) is reduced, and the power consumption of the pixel driving circuit (100) is reduced, thereby effectively reducing the power consumption of the display panel and the display device.

[0093] All possible combinations of each technical feature of the embodiments described above have been explained, and all such combinations of technical features should be deemed to be within the scope described herein, provided they are not contradictory.

[0094] In the description of this specification, reference terms such as “one embodiment,” “some embodiment,” “exemplary embodiment,” “example,” “specific example,” or “some example” mean that specific features, structures, materials, or properties described by combining the above-described embodiments or examples are included in at least one embodiment or example of this application. Exemplary descriptions of the above-described terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or properties may be combined in a suitable manner in any one or more embodiments or examples.

[0095] The embodiments described above represent only a few embodiments of the present application, and while the description is relatively specific and detailed, it should not be understood as a limitation on the claims. Those skilled in the art may make minor modifications and improvements without departing from the concept of the present application, and such modifications and improvements are all within the scope of protection of the present application. Accordingly, the scope of protection of the present application should be based on the appended claims.

Claims

Claim 1 A pixel driving circuit comprising a first driving module and a light-emitting unit, wherein the pixel driving circuit further comprises 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 terminal and a second power terminal, wherein the first driving module receives a first scan signal and a data signal, and selectively receives a first voltage from the first power terminal and a second voltage from the second power terminal according to the first scan signal and the data signal, and the second driving module receives a second scan signal and the data signal, and selectively receives the second voltage from the first power terminal and the first voltage from the second power terminal according to the second scan signal and the data signal, and wherein 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, and wherein the first driving module comprises a first light-emitting driving circuit and a second light-emitting driving circuit The circuit includes a first light-emitting driving circuit, the first terminal of the first light-emitting driving circuit is electrically connected to the first power terminal to receive the first voltage from the first power terminal, the second terminal of the first light-emitting driving circuit is electrically connected to the light-emitting unit, the first terminal of the second light-emitting driving circuit is electrically connected to the light-emitting unit, the second terminal of the second light-emitting driving circuit is electrically connected to the second power terminal to receive the second voltage from the second power terminal, the light-emitting unit includes a light-emitting element, the light-emitting element includes a first terminal and a second terminal, and both the first terminal and the second terminal of the light-emitting element are electrically connected to the first driving module and the second driving module, and the first light-emitting driving circuit includes a first transistor and a second transistor.The pixel driving circuit is characterized in that the second light-emitting driving circuit includes a third transistor, the control terminal of the first transistor receives the data signal, the first terminal of the first transistor is electrically connected to the first power terminal to receive the first voltage from the first power terminal, the second terminal of the first transistor is electrically connected to the first terminal of the second transistor, the control terminal of the second transistor receives the first scan signal, the second terminal of the second transistor is electrically connected to the first terminal of the light-emitting element, the control terminal of the third transistor receives the first scan signal, the first terminal of the third transistor is electrically connected to the second terminal of the light-emitting element, and the second terminal of the third transistor is electrically connected to the second power terminal to receive the second voltage from the second power terminal. Claim 2 A pixel driving circuit according to claim 1, wherein the second driving module includes a third light-emitting driving circuit and a fourth light-emitting driving circuit, wherein the first terminal of the third light-emitting driving circuit is electrically connected to the second power terminal to receive the first voltage from the second power terminal, the second terminal of the third light-emitting driving circuit is electrically connected to the light-emitting unit, the first terminal of the fourth light-emitting driving circuit is electrically connected to the first power terminal to receive the second voltage from the first power terminal, and the second terminal of the fourth light-emitting driving circuit is electrically connected to the light-emitting unit. Claim 3 In claim 2, the pixel driving circuit is characterized in that the third light-emitting driving circuit includes a fourth transistor and a fifth transistor, the fourth light-emitting driving circuit includes a sixth transistor, the control terminal of the fourth transistor receives the data signal, the first terminal of the fourth transistor is electrically connected to the second power terminal to receive the first voltage from the second power terminal, the second terminal of the fourth transistor is electrically connected to the first terminal of the fifth transistor, the control terminal of the fifth transistor receives the second scan signal, the second terminal of the fifth transistor is electrically connected to the first terminal of the light-emitting element, the control terminal of the sixth transistor receives the second scan signal, the first terminal of the sixth transistor is electrically connected to the second terminal of the light-emitting element, and the second terminal of the sixth transistor is electrically connected to the first power terminal to receive the second voltage from the first power terminal. Claim 4 A pixel driving circuit according to claim 3, wherein when the control terminal of the first transistor receives the data signal and the first scan signal is at the first potential, the first transistor, the second transistor, and the third transistor are all in the ON state, the first voltage is transmitted to the first terminal of the light-emitting element through the first transistor and the second transistor, the second voltage is transmitted to the second terminal of the light-emitting element through the third transistor, and the light-emitting element emits light under the driving of the first voltage and the second voltage, and when the control terminal of the fourth transistor receives the data signal and the second scan signal is at the first potential, the fourth transistor, the fifth transistor, and the sixth transistor are all in the ON state, the first voltage is transmitted to the first terminal of the light-emitting element through the fourth transistor and the fifth transistor, the second voltage is transmitted to the second terminal of the light-emitting element through the sixth transistor, and the light-emitting element emits light under the driving of the first voltage and the second voltage. Claim 5 A pixel driving circuit according to claim 1, wherein the pixel driving circuit further comprises a signal short circuit, and the signal short circuit comprises a plurality of switch subcircuits, wherein the switch subcircuits are electrically connected to both the first driving module and the second driving module, and when the first driving module and the second driving module are switched to drive the light emission of the light-emitting unit, the switch subcircuits short-circuit the first scan signal and the second scan signal. Claim 6 A display panel comprising a signal controller and a pixel driving circuit described in any one of claims 1 to 5, wherein the signal controller provides a first scan signal and a second scan signal to the pixel driving circuit. Claim 7 A display device comprising a power module and a display panel described in claim 6, wherein the power module supplies power to the display panel. Claim 8 delete Claim 9 delete Claim 10 delete Claim 11 delete Claim 12 delete Claim 13 delete Claim 14 delete Claim 15 delete Claim 16 delete Claim 17 delete Claim 18 delete Claim 19 delete Claim 20 delete

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