Display device and driving method thereof

Abstract

The application discloses a display device and a driving method thereof. In the display device, a first pixel circuit is electrically connected with a first power line and a first light emitting element, the first light emitting element is electrically connected with a second power line, a second pixel circuit is electrically connected with a third power line and a second light emitting element, and the second light emitting element is electrically connected with a fourth power line; a first gate drive circuit is electrically connected with the first pixel circuit; a second gate drive circuit is electrically connected with the second pixel circuit; in a first mode, the first gate drive circuit provides a first pulse signal to the first pixel circuit, at least in the case that a light emitting control module in the first pixel circuit is in a conductive state, at least one of a first power terminal and a second power terminal corresponding to the first pixel circuit is in a suspended state; and the second gate drive circuit provides a second pulse signal to the second pixel circuit, and a power terminal corresponding to the second pixel circuit is in a power supply state. According to the embodiment of the application, the use performance of the display product is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display device and its driving method. Background Technology

[0002] Organic light-emitting diode (OLED) and flat panel display devices based on light-emitting diode (LED) technologies are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body and wide range of applications, becoming the mainstream of display devices.

[0003] However, the performance of current display products needs to be improved. Summary of the Invention

[0004] This application provides a display device and its driving method, which helps to improve the performance of display products.

[0005] In a first aspect, embodiments of this application provide a display device, comprising: a first display area and a second display area; a pixel circuit, including a first pixel circuit and a second pixel circuit, wherein the first pixel circuit is electrically connected to a first light-emitting element in the first display area, and the second pixel circuit is electrically connected to a second light-emitting element in the second display area, wherein the first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, the second electrode of the first light-emitting element is electrically connected to a second power line, the second pixel circuit is electrically connected between a third power line and the first electrode of the second light-emitting element, the second electrode of the second light-emitting element is electrically connected to a fourth power line, the first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power terminal is electrically connected to a fourth power terminal; a first gate driving circuit electrically connected to the first pixel circuit; a second gate driving circuit electrically connected to the second pixel circuit; the display panel's operating mode includes a first mode; in the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and at least one of the first power terminal and the second power terminal corresponding to the first pixel circuit is in a floating state when the light-emitting control module in the first pixel circuit is in a conducting state.

[0006] Furthermore, the second gate driving circuit provides a second pulse signal to the second pixel circuit, and the third and fourth power supply terminals corresponding to the second pixel circuit are in a power supply state.

[0007] In one possible embodiment of the first aspect, in the first mode, the amplitude of the first pulse signal and the amplitude of the second pulse signal are the same, and / or the frequency of the first pulse signal and the frequency of the second pulse signal are the same, and / or the duty cycle of the first pulse signal and the duty cycle of the second pulse signal are the same.

[0008] Preferably, the first pulse signal includes a first A scan signal, which is used to control the writing of data signals of the first pixel circuit, and the second pulse signal includes a first B scan signal, which is used to control the writing of data signals of the second pixel circuit. In the first mode, the first A scan signal and the first B scan signal are the same.

[0009] And / or, the first pulse signal includes a second A scan signal, which is used to control the threshold compensation of the driving transistor in the first pixel circuit, and the second pulse signal includes a second B scan signal, which is used to control the threshold compensation of the driving transistor in the second pixel circuit. In the first mode, the second A scan signal and the second B scan signal are the same.

[0010] And / or, the first pulse signal includes a third A scan signal, which is used to control the transmission of the reset signal of the first pixel circuit to the control terminal of the driving module of the first pixel circuit; the second pulse signal includes a third B scan signal, which is used to control the transmission of the reset signal of the second pixel circuit to the control terminal of the driving module of the second pixel circuit; in the first mode, the third A scan signal and the third B scan signal are the same.

[0011] And / or, the first pulse signal includes a fourth A scan signal, which is used to control the transmission of the initialization signal of the first pixel circuit to the first electrode of the first light-emitting element; the second pulse signal includes a fourth B scan signal, which is used to control the transmission of the initialization signal of the second pixel circuit to the first electrode of the second light-emitting element; in the first mode, the fourth A scan signal and the fourth B scan signal are the same.

[0012] And / or, the first pulse signal includes a light emission control signal A, which is used to control the state of the light emission control module of the first pixel circuit, and the second pulse signal includes a light emission control signal B, which is used to control the state of the light emission control module of the second pixel circuit. In the first mode, the light emission control signal A and the light emission control signal B are the same.

[0013] Preferably, in the first mode, the data signal accessed by the first pixel circuit in the i-th row and j-th column is the same as the data signal accessed by the second pixel circuit in the i-th row and j-th column, i and j are greater than or equal to 1, and i and j are integers;

[0014] And / or, in the first mode, the reset signal accessed by the first pixel circuit is the same as the reset signal accessed by the second pixel circuit;

[0015] And / or, in the first mode, the initialization signal accessed by the first pixel circuit is the same as the initialization signal accessed by the second pixel circuit.

[0016] In one possible embodiment of the first aspect, the operating mode of the display device further includes a second mode, in which both the first power terminal and the second power terminal are in a power supply state, and the third power terminal and the fourth power terminal are in a power supply state.

[0017] Preferably, the display device is a foldable display device, and in the first mode, the display device is in a folded state;

[0018] Preferably, in the second mode, the display device is in a flattened state.

[0019] In one possible embodiment of the first aspect, the first light-emitting elements located in the first display area are distributed in multiple rows, and in the first mode, the first power supply terminal is in a power supply state;

[0020] Multiple first light-emitting elements in the same row are electrically connected to the same second power supply terminal, and first light-emitting elements in different rows are electrically connected to different second power supply terminals. In the first mode, when the light-emitting control module in the first pixel circuit is in the on state, the second power supply terminal is in the floating state. When the light-emitting control module in the first pixel circuit is in the off state, the second power supply terminal is in the power supply state.

[0021] Alternatively, the first light-emitting elements in different rows are electrically connected to the same second power supply terminal. In the first mode, when the light-emitting control module in the first pixel circuit is in the on state and the off state, the second power supply terminal is in the floating state.

[0022] Preferably, the first pixel circuit includes a driving module, and the light-emitting control module and the driving module in the first pixel circuit are connected in series between the first power line and the first electrode of the first light-emitting element;

[0023] Preferably, in the first mode, the first power supply terminal is in a power supply state, and the first power supply terminal and the third power supply terminal are the same power supply terminal.

[0024] Based on the same inventive concept, in a second aspect, embodiments of this application provide a driving method for a display device, the display device comprising:

[0025] First display area and second display area;

[0026] The pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in a first display area, and the second pixel circuit is electrically connected to a second light-emitting element in a second display area. The first pixel circuit is electrically connected between a first positive power line and a first electrode of the first light-emitting element. The second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and the first electrode of the second light-emitting element. The second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal. The second power line is electrically connected to a second power terminal. The third power line is electrically connected to a third power terminal. The fourth power terminal is electrically connected to a fourth power terminal.

[0027] The first gate driving circuit is electrically connected to the first pixel circuit;

[0028] The second gate driving circuit is electrically connected to the second pixel circuit;

[0029] The display panel's operating modes include the first mode;

[0030] The driving methods include:

[0031] In the first mode, the first gate driving circuit is controlled to provide a first pulse signal to the first pixel circuit. At least when the light emission control module of the first pixel circuit is in the on state, at least one of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit is controlled to be in the floating state.

[0032] Furthermore, the second gate driving circuit is controlled to provide a second pulse signal to the second pixel circuit, and the third and fourth power supply terminals corresponding to the second pixel circuit are controlled to be in a power supply state.

[0033] In one possible embodiment of the second aspect, in the first mode, the amplitude of the first pulse signal and the amplitude of the second pulse signal are the same, and / or the frequency of the first pulse signal and the frequency of the second pulse signal are the same, and / or the duty cycle of the first pulse signal and the duty cycle of the second pulse signal are the same.

[0034] Preferably, the first pulse signal includes a first A scan signal, which is used to control the writing of data signals of the first pixel circuit, and the second pulse signal includes a first B scan signal, which is used to control the writing of data signals of the second pixel circuit. In the first mode, the first A scan signal and the first B scan signal are the same.

[0035] And / or, the first pulse signal includes a second A scan signal, which is used to control the threshold compensation of the driving transistor in the first pixel circuit, and the second pulse signal includes a second B scan signal, which is used to control the threshold compensation of the driving transistor in the second pixel circuit. In the first mode, the second A scan signal and the second B scan signal are the same.

[0036] And / or, the first pulse signal includes a third A scan signal, which is used to control the transmission of the reset signal of the first pixel circuit to the control terminal of the driving module of the first pixel circuit; the second pulse signal includes a third B scan signal, which is used to control the transmission of the reset signal of the second pixel circuit to the control terminal of the driving module of the second pixel circuit; in the first mode, the third A scan signal and the third B scan signal are the same.

[0037] And / or, the first pulse signal includes a fourth A scan signal, which is used to control the transmission of the initialization signal of the first pixel circuit to the first electrode of the first light-emitting element; the second pulse signal includes a fourth B scan signal, which is used to control the transmission of the initialization signal of the second pixel circuit to the first electrode of the second light-emitting element; in the first mode, the fourth A scan signal and the fourth B scan signal are the same.

[0038] And / or, the first pulse signal includes a light emission control signal A, which is used to control the state of the light emission control module of the first pixel circuit, and the second pulse signal includes a light emission control signal B, which is used to control the state of the light emission control module of the second pixel circuit. In the first mode, the light emission control signal A and the light emission control signal B are the same.

[0039] Preferably, the method further includes:

[0040] In the first mode, the data signal accessed by the first pixel circuit in the i-th row and j-th column is the same as the data signal accessed by the second pixel circuit in the i-th row and j-th column.

[0041] And / or, in the first mode, the reset signal controlling the first pixel circuit is the same as the reset signal controlling the second pixel circuit.

[0042] And / or, in the first mode, the initialization signal controlling the access of the first pixel circuit is the same as the initialization signal controlling the access of the second pixel circuit.

[0043] In one possible embodiment of the second aspect, the operating mode of the display device further includes a second mode, and the method further includes:

[0044] In the second mode, both the first and second power supply terminals are in a power supply state, and the third and fourth power supply terminals are also in a power supply state.

[0045] Preferably, the display device is a foldable display device, and the method further includes:

[0046] When the display device is in a folded state, control the display device to operate in the first mode;

[0047] Preferably, the method further includes:

[0048] When the display device is in a flattened state, control the display device to operate in the second mode.

[0049] In one possible embodiment of the second aspect, the first light-emitting elements located in the first display area are distributed in multiple rows, and in the first mode, the first power supply terminal is in a power supply state;

[0050] Multiple first light-emitting elements in the same row are electrically connected to the same second power supply terminal, and first light-emitting elements in different rows are electrically connected to different second power supply terminals. At least when the light-emitting control module of the first pixel circuit is in the ON state, the second power supply terminal is controlled to be in a floating state, including:

[0051] When the light-emitting control module in the first pixel circuit is in the on state, the second power supply terminal is controlled to be in the floating state; when the light-emitting control module in the first pixel circuit is in the off state, the second power supply terminal is controlled to be in the power supply state.

[0052] Alternatively, the first light-emitting elements in different rows are electrically connected to the same second power supply terminal, and at least when the light-emitting control module of the first pixel circuit is in the on state, the second power supply terminal is controlled to be in a floating state, including:

[0053] When the light-emitting control module in the first pixel circuit is in the on state or the off state, the second power supply terminal is in the floating state.

[0054] Based on the same inventive concept, in a third aspect, embodiments of this application provide a display device, including:

[0055] First display area and second display area;

[0056] The pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in a first display area, and the second pixel circuit is electrically connected to a second light-emitting element in a second display area. The first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and the first electrode of the second light-emitting element, and the second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power terminal is electrically connected to a fourth power terminal.

[0057] The first gate driving circuit is electrically connected to the first pixel circuit;

[0058] The second gate driving circuit is electrically connected to the second pixel circuit;

[0059] The display panel's operating modes include the first mode;

[0060] In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and at least when the light emission control module in the first pixel circuit is in the on state, the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are the same.

[0061] Furthermore, the second gate driving circuit provides a second pulse signal to the second pixel circuit, which has a different potential from the third and fourth power supply terminals corresponding to the second pixel circuit.

[0062] Based on the same inventive concept, in a fourth aspect, embodiments of this application provide a driving method for a display device, characterized in that the display device includes:

[0063] First display area and second display area;

[0064] The pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in a first display area, and the second pixel circuit is electrically connected to a second light-emitting element in a second display area. The first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and the first electrode of the second light-emitting element, and the second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power terminal is electrically connected to a fourth power terminal.

[0065] The first gate driving circuit is electrically connected to the first pixel circuit;

[0066] The second gate driving circuit is electrically connected to the second pixel circuit;

[0067] The display panel's operating modes include the first mode;

[0068] The driving methods include:

[0069] In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and at least when the light emission control module in the first pixel circuit is in the on state, the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are the same.

[0070] Furthermore, the second gate driving circuit provides a second pulse signal to the second pixel circuit, controlling the potentials of the third and fourth power supply terminals corresponding to the second pixel circuit to be different.

[0071] According to the display device and driving method provided in the embodiments of this application, in the first mode, when the light-emitting control module of the first pixel circuit is in the on state, at least one of the first power supply terminal and the second power supply terminal is in a floating state, which is equivalent to placing the first light-emitting element in the first display area in an open path. Therefore, the first light-emitting element in the first display area will not emit light, making the first display area appear black. Since the first light-emitting element cannot emit light, the first gate driving circuit can also be in a working state. With both the first gate driving circuit and the second gate driving circuit in a working state, the consistency of the offset state of the transistors in the first pixel circuit and the second pixel circuit can be improved, thereby reducing the brightness difference between the first display area and the second display area, thus helping to improve the performance of the display panel. Attached Figure Description

[0072] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0073] Figure 1 This illustration shows a schematic diagram of a display device provided in an embodiment of this application;

[0074] Figure 2 This illustration shows a schematic diagram of a display device provided in an embodiment of this application;

[0075] Figure 3 This illustration shows a schematic diagram of a first pixel circuit in a display device provided in an embodiment of this application;

[0076] Figure 4 This illustration shows a schematic diagram of a second pixel circuit in a display device provided in an embodiment of this application;

[0077] Figure 5 Show Figure 3 and Figure 4 A timing diagram;

[0078] Figure 6 This invention provides another schematic diagram of the structure of a display device according to an embodiment of the present application.

[0079] Figure 7 This illustration shows a cross-sectional structural diagram of a display device provided in an embodiment of this application;

[0080] Figure 8 This illustration shows a flowchart of a driving method for a display device provided in an embodiment of this application. Detailed Implementation

[0081] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0082] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0083] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0084] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0085] In the embodiments of this application, the term "electrical connection" can refer to a direct electrical connection between two components, or it can refer to an electrical connection between two components via one or more other components.

[0086] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this application can be combined with each other without contradiction.

[0087] Before describing the technical solutions provided in the embodiments of this application, in order to facilitate understanding of the embodiments of this application, this application first specifically explains the problems existing in the related technologies:

[0088] OLED display devices have many advantages such as self-illumination and high contrast, making them a promising display device with broad application prospects.

[0089] OLED displays are current-driven light-emitting devices, which use pixel circuits to generate driving current to drive the light-emitting elements to emit light. With the development of display technology, the functions of display devices are becoming increasingly diverse.

[0090] For example, OLED products, due to their manufacturing process characteristics, can be made into flexible display devices, and are therefore often used as foldable display devices. For instance, outward-folding display devices have the advantages of being lightweight, thin, and having low power consumption, and their cost is lower than that of inward-folding display devices, making them more popular with consumers in the display product market.

[0091] Foldable display devices can include at least two display areas, one as the main screen and the other as the secondary screen. To leverage the overall power efficiency of foldable displays, the main and secondary screens can be designed with independent gate-in-panel (GIP) circuits. In the folded state, the main screen can display images, while the secondary screen can be in a black state. The gate-in-panel circuit of the main screen can be active, while the gate-in-panel circuit of the secondary screen can be inactive (e.g., the scan start signal STV and the light emission control start signal EIN of the gate-in-panel circuit are off). The pixel circuit of the secondary screen enters a high-level state. After prolonged use, the thin-film transistors (TFTs) of the pixel circuit of the secondary screen remain in a high-level state, causing a threshold voltage shift (Vth shift). This results in a significant difference in the shift state of the transistors in the pixel circuits of the main and secondary screens. Consequently, when switching to full-screen display, the brightness of the main and secondary screens becomes inconsistent, resulting in a split-screen phenomenon.

[0092] To address the aforementioned technical problems, this application provides a display device and its driving method. The embodiments of this application will be described below with reference to the accompanying drawings.

[0093] like Figure 1As shown, the display device 100 may include a first display area AA1, a second display area AA2, pixel circuits and light-emitting elements, a first gate driving circuit GIP1 and a second gate driving circuit GIP2.

[0094] The pixel circuit includes a first pixel circuit 10a and a second pixel circuit 10b, and the light-emitting elements include a first light-emitting element 21 and a second light-emitting element 22. The first light-emitting element 21 is located in the first display area AA1, and the second light-emitting element 22 is located in the second display area AA2. The first pixel circuit 10a is electrically connected to the first light-emitting element 21, and the second pixel circuit 10b is electrically connected to the second light-emitting element 22.

[0095] The first pixel circuit 10a is electrically connected between the first power line ELVDD1 and the first electrode of the first light-emitting element 21, and the second electrode of the first light-emitting element 21 is electrically connected to the second power line ELVSS1. The second pixel circuit 10b is electrically connected between the third power line ELVDD2 and the first electrode of the second light-emitting element 22, and the second electrode of the second light-emitting element 22 is electrically connected to the fourth power line ELVSS2. The first power line ELVDD1 is electrically connected to the first power terminal P1, the second power line ELVSS1 is electrically connected to the second power terminal P2, the third power line ELVDD2 is electrically connected to the third power terminal P3, and the fourth power line ELVSS2 is electrically connected to the fourth power terminal P4.

[0096] Since the second power line ELVSS1 and the fourth power line ELVSS2 are electrically connected to different power terminals, they can be powered independently. The second electrode of the first light-emitting element 21 and the second electrode of the second light-emitting element 22 can also be independent of each other.

[0097] For example, when the first power supply terminal P1 and the third power supply terminal P3 are different power supply terminals, the first power supply line ELVDD1 and the third power supply line ELVDD2 can also be powered independently.

[0098] Furthermore, both the first pixel circuit 10a and the second pixel circuit 10b include a light-emitting control module. For ease of distinction, the light-emitting control module of the first pixel circuit 10a is labeled 11a, and the light-emitting control module of the second pixel circuit 10b is labeled 11b. The light-emitting control module can selectively control the light-emitting element to enter the light-emitting stage. For example, when both the first power line ELVDD1 and the second power line ELVSS1 are powered on and have different power supply potentials, when the light-emitting control module 11a of the first pixel circuit 10a is turned on, the first light-emitting element 21 can enter the light-emitting stage; when the light-emitting control module 11a of the first pixel circuit 10a is turned off, the first light-emitting element 21 can enter the non-light-emitting stage.

[0099] The first gate driving circuit GIP1 is electrically connected to the first pixel circuit 10a; the second gate driving circuit GIP2 is electrically connected to the second pixel circuit 10b. The signal provided by the first gate driving circuit GIP1 can be used to control the transistor in the first pixel circuit 10a to turn on or off, and the signal provided by the second gate driving circuit GIP2 can be used to control the transistor in the second pixel circuit 10b to turn on or off.

[0100] The operating modes of the display device 100 may include a first mode. In the first mode, the first gate driving circuit GIP1 provides a first pulse signal to the first pixel circuit 10a. At least when the light-emitting control module 11a of the first pixel circuit 10a is in the on state, at least one of the first power supply terminal P1 and the second power supply terminal P2 corresponding to the first pixel circuit 10a is in a floating state. Furthermore, in the first mode, the second gate driving circuit GIP2 provides a second pulse signal to the second pixel circuit 10b, and the third power supply terminal P3 and the fourth power supply terminal P4 corresponding to the second pixel circuit 10b are in a powered state.

[0101] It should be noted that at least one of the first power supply terminal P1 and the second power supply terminal P2 being in a floating state includes three cases: the first power supply terminal P1 is in a floating state, or the second power supply terminal P2 is in a floating state, or the first power supply terminal P1 and the second power supply terminal P2 are in a floating state.

[0102] It should be noted that a pulse signal refers to a signal that includes both high and low levels. In the first mode, both the first gate drive circuit GIP1 and the second gate drive circuit GIP2 can provide pulse signals, therefore both the first gate drive circuit GIP1 and the second gate drive circuit GIP2 are in operation.

[0103] Furthermore, when at least one of the first power supply terminal P1 and the second power supply terminal P2 is in a floating state, it is equivalent to placing the first light-emitting element 21 in an open path, thus preventing the first light-emitting element 21 from emitting light; that is, the first light-emitting element 21 is in an illegal light state. Meanwhile, the third power supply terminal P3 and the fourth power supply terminal P4 are in a normal power supply state, therefore the second light-emitting element 22 can emit light normally. It is understood that the supply potentials of the third power supply terminal P3 and the fourth power supply terminal P4 are different to allow the second light-emitting element 22 to emit light normally. For example, the supply potential of the third power supply terminal P3 is a positive voltage, and the supply potential of the fourth power supply terminal P4 is a negative voltage.

[0104] For example, the display device may be a foldable display device, with the first display area AA1 serving as a secondary screen and the second display area AA2 serving as the primary screen. In the first mode, the display device is in a folded state.

[0105] For example, the first display area AA1 and the second display area AA2 can be different display areas of the same display panel, or the first display area AA1 and the second display area AA2 can be display areas of two separate display panels.

[0106] According to the display device provided in the embodiments of this application, in the first mode, when the light-emitting control module 11a of the first pixel circuit 10a is in the on state, at least one of the first power supply terminal P1 and the second power supply terminal P2 is in a floating state, which is equivalent to putting the first light-emitting element 21 in the first display area AA1 in an open path. Therefore, the first light-emitting element 21 in the first display area AA1 does not emit light, making the first display area AA1 appear black. Since the first light-emitting element 21 cannot emit light, the first gate driving circuit GIP1 can also be in a working state. Both the first gate driving circuit GIP1 and the second gate driving circuit GIP2 are in a working state, which can improve the consistency of the offset state of the transistors in the first pixel circuit 10a and the second pixel circuit 10b, thereby reducing the brightness difference between the first display area AA1 and the second display area AA2, thus helping to improve the performance of the display panel.

[0107] For example, in the first mode, the first power supply terminal P1 can be in a powered state, and the second power supply terminal P2 can be in a floating state, such as... Figure 2 As shown, the first power supply terminal P1 connected to the first power supply line ELVDD1 and the third power supply terminal P3 connected to the third power supply line ELVDD2 can be the same power supply terminal. That is, the same power supply terminal can be used to supply power to the first power supply line ELVDD1 and the third power supply line ELVDD2, i.e., the same power supply chip can be used to supply power to the first power supply line ELVDD1 and the third power supply line ELVDD2.

[0108] Of course, this is merely an example and is not intended to limit this application. For instance, in order to flexibly control the power supply of the first power line ELVDD1 and the third power line ELVDD2, the first power line ELVDD1 and the third power line ELVDD2 can be electrically connected to different power supply terminals.

[0109] In some embodiments, in a first mode, a first gate driving circuit GIP1 provides a first pulse signal to a first pixel circuit 10a, and a second gate driving circuit GIP2 provides a second pulse signal to a second pixel circuit 10b. The amplitude of the first pulse signal is the same as the amplitude of the second pulse signal, and / or the frequency of the first pulse signal is the same as the frequency of the second pulse signal, and / or the duty cycle of the first pulse signal is the same as the duty cycle of the second pulse signal. This ensures that the gate control signals accessed by the first pixel circuit 10a and the second pixel circuit 10b are the same, further improving the consistency of the transistor offset states in the two pixel circuits, thereby reducing the brightness difference between the first display area and the second display area, and thus contributing to improved performance of the display panel.

[0110] The pulse signal includes high-level and low-level signals. The amplitude of the first pulse signal and the amplitude of the second pulse signal being the same may include: the high-level amplitude of the first pulse signal and the high-level amplitude of the second pulse signal being the same, and / or, the low-level amplitude of the first pulse signal and the low-level amplitude of the second pulse signal being the same.

[0111] The frequency of a pulse signal refers to the number of pulses that occur within one second. For example, the frequencies of the first and second pulse signals can both be 60 Hz, or both 90 Hz, or both 120 Hz, etc.

[0112] The duty cycle of a pulse signal refers to the duty cycle of the effective level within one cycle. For example, if a pulse signal controls a P-type transistor, the effective level can be low; if a pulse signal controls an N-type transistor, the effective level can be high.

[0113] As an example, the first pixel circuit 10a may include, but is not limited to, such as Figure 3 The structure shown, and the second pixel circuit 10b may include, but are not limited to, the following: Figure 4 The structure shown.

[0114] like Figure 3 and Figure 4 As shown, the equivalent circuit structures of the first pixel circuit 10a and the second pixel circuit 10b can be the same. The first pixel circuit 10a and the second pixel circuit 10b may include a light-emitting control module 11, a driving module 13, a data writing module 14, a threshold compensation module 15, a reset module 16, and an initialization module 17. To distinguish the same functional modules of the first pixel circuit 10a and the second pixel circuit 10b and the control signals connected to these same functional modules, wherein... Figure 3The functional modules of the first pixel circuit 10a are respectively labeled as light emission control module 11a, driving module 13a, data writing module 14a, threshold compensation module 15a, reset module 16a and initialization module 17a, and the control signals connected are respectively labeled as S1a, S2a, S3a, S4a and EMa. Figure 4 The functional modules of the second pixel circuit 10b are respectively labeled as light emission control module 11b, driving module 13b, data writing module 14b, threshold compensation module 15b, reset module 16b and initialization module 17b, and the control signals connected are respectively labeled as S1b, S2b, S3b, S4b and EMb.

[0115] The connection relationships between the various functional modules can be found in [reference]. Figure 3 and Figure 4 This will not be elaborated upon here.

[0116] The first pulse signal includes a first A scan signal S1a, which is used to control the writing of the data signal data(a) of the first pixel circuit 10a. The second pulse signal includes a first B scan signal S1b, which is used to control the writing of the data signal data(b) of the second pixel circuit 10b. In the first mode, the first A scan signal S1a and the first B scan signal S1b are the same.

[0117] And / or, the first pulse signal includes a second A scan signal S2a, which is used to control the threshold compensation of the driving transistor in the first pixel circuit 10a, and the second pulse signal includes a second B scan signal S2b, which is used to control the threshold compensation of the driving transistor in the second pixel circuit 10b. In the first mode, the second A scan signal S2a and the second B scan signal S2b are the same.

[0118] And / or, the first pulse signal includes a third A scan signal S3a, which is used to control the transmission of the reset signal Vref1(a) of the first pixel circuit 10a to the control terminal of the driving module of the first pixel circuit 10a. The second pulse signal includes a third B scan signal S3b, which is used to control the transmission of the reset signal Vref1(b) of the second pixel circuit 10b to the control terminal of the driving module of the second pixel circuit 10b. In the first mode, the third A scan signal S3a and the third B scan signal S3b are the same.

[0119] And / or, the first pulse signal includes a fourth A scan signal S4a, which is used to control the transmission of the initialization signal Vref2(a) of the first pixel circuit 10a to the first electrode of the first light-emitting element 21. The second pulse signal includes a fourth B scan signal S4b, which is used to control the transmission of the initialization signal Vref2(b) of the second pixel circuit 10b to the first electrode of the second light-emitting element 22. In the first mode, the fourth A scan signal S4a and the fourth B scan signal S4b are the same.

[0120] And / or, the first pulse signal includes a light emission control signal EMA, which is used to control the state of the light emission control module 11a of the first pixel circuit 10a, and the second pulse signal includes a light emission control signal EMb, which is used to control the state of the light emission control module 11b of the second pixel circuit 10b. In the first mode, the light emission control signal EMA and the light emission control signal EMb are the same.

[0121] It should be noted that the two signals being "same" here can include at least one of the following: amplitude, frequency, and duty cycle.

[0122] It should be noted that, Figure 3 , Figure 4 Taking the example that all the transistors in each module of the pixel circuit are P-type transistors, the transistors in each module of the pixel circuit can also be N-type transistors, or some can be P-type transistors and the other part can be N-type transistors.

[0123] In addition, such as Figure 5 As shown, in the first mode, the operation of the first pixel circuit 10a and the second pixel circuit 10b includes an initialization phase t11, a data writing phase t12, and a light emission phase t13.

[0124] The following section uses the first pixel circuit 10a as an example to introduce the working status of each stage.

[0125] During the initialization phase t11, the third scan signal S3a controls the reset module 16a to turn on, and resets the control terminal potential of the reset drive module 13a.

[0126] During the data writing stage t12, the first scan signal S1a controls the data writing module 14a to turn on, the second scan signal S2a controls the threshold compensation module 15a to turn on, and the voltage of the data signal data(a) after threshold compensation is written to the control terminal of the drive module 13a.

[0127] During the light-emitting stage t13, the light-emitting control signal EMA controls the light-emitting control module 11a to be turned on, and the second power supply terminal P2, which is electrically connected to the second electrode of the first light-emitting element 21, is in a floating state, so the first light-emitting element 21 does not emit light.

[0128] The second pixel circuit 10b and the first pixel circuit 10a have the same working state in the initialization stage t11 and the data writing stage t12. The difference between the second pixel circuit 10b and the first pixel circuit 10a in the light-emitting stage t13 is that in the second pixel circuit 10b, in the light-emitting stage t13, the light-emitting control signal EMb controls the light-emitting control module 11b to be turned on, and the fourth power supply terminal P4 connected to the second pole of the second light-emitting element 22 is in the power supply state, and the second light-emitting element 22 emits light.

[0129] For example, such as Figure 5 As shown, in the second mode, the operation of the first pixel circuit 10a and the second pixel circuit 10b includes an initialization phase t21, a data writing phase t22, and an emission phase t23.

[0130] The initialization phase t21 and data writing phase t22 in the second mode are the same as the initialization phase t11 and data writing phase t12 in the first mode. The difference is that in the light emission phase t23 of the second mode, the light emission control signal EMa controls the light emission control module 11a to be turned on, the second power supply terminal P2 connected to the second electrode of the first light emission element 21 is in a powered state, and the first light emission element 21 emits light.

[0131] It should be noted that, Figure 4 In the example of the first mode where the first power supply terminal P1 is in a powered state and the second power supply terminal P2 is in a floating state, in other examples, the first power supply terminal P1 may also be in a floating state in the first mode. Furthermore, the operation process of the pixel circuit in this embodiment may include... Figure 5 The process shown is not limited to this. Additionally, Figure 4 Solid lines indicate that the power supply is in a powered state, while dashed lines indicate that the power supply is in a floating state.

[0132] In addition, the power terminals connected to the first power line ELVDD1 and the third power line ELVDD2 can be used to provide positive voltage during power supply. The second power terminal P2 connected to the second power line ELVSS1 and the fourth power terminal P4 connected to the fourth power line ELVSS2 can be used to provide negative voltage during power supply.

[0133] For example, both the first pixel circuit 10a and the second pixel circuit 10b can be arranged in rows and columns. In the first mode, other signals accessed by the first pixel circuit 10a and the second pixel circuit 10b can also be the same. For example, in the first mode, the data signal data(a) accessed by the first pixel circuit 10a in the i-th row and j-th column and the data signal data(b) accessed by the second pixel circuit 10b in the i-th row and j-th column can be the same, i and j are greater than or equal to 1, and i and j are integers; and / or, the reset signal Vref1(a) accessed by the first pixel circuit 10a and the reset signal Vref1(b) accessed by the second pixel circuit 10b can be the same; and / or, the initialization signal Vref2(a) accessed by the first pixel circuit 10a and the initialization signal Vref2(b) accessed by the second pixel circuit 10b can be the same.

[0134] The first pixel circuit 10a and the second pixel circuit 10b are connected to the same other signals, which can further improve the consistency of the offset state of the transistors in the two pixel circuits, thereby reducing the brightness difference between the first display area and the second display area, and thus helping to improve the performance of the display panel.

[0135] In some embodiments, the operating mode of the display device further includes a second mode. In the second mode, the first power supply terminal P1, electrically connected to the first power supply line ELVDD1, is powered; the second power supply terminal P2, electrically connected to the second power supply line ELVSS1, is powered; the third power supply terminal P3, electrically connected to the third power supply line ELVDD2, is powered; and the fourth power supply terminal P4, electrically connected to the fourth power supply line ELVSS2, is powered. Thus, in the second mode, both the first light-emitting element 21 and the second light-emitting element 22 can be displayed normally.

[0136] For example, the display device is a foldable display device, and in the second mode, the foldable display device is in a flattened state. In the second mode, both the first display area and the second display area of ​​the display device can emit light and display.

[0137] For example, in the first mode, both the power terminals connected to the first power line ELVDD1 and the third power line ELVDD2 can be in a power-on state. In the second mode, both the power terminals connected to the first power line ELVDD1 and the third power line ELVDD2 can be in a power-on state.

[0138] In some embodiments, such as Figure 1 As shown, the first light-emitting element 21 located in the first display area AA1 can be distributed in multiple rows.

[0139] As an example, please refer to Figure 1The second electrodes of the first light-emitting elements 21 in different rows can all be electrically connected to the same second power supply terminal P2. In the first mode, when the light-emitting control module 11a in the first pixel circuit 10a is in the on state and the off state, the second power supply terminal P2 is in the floating state.

[0140] The light-emitting control module 11a in the first pixel circuit 10a is usually turned on row by row. When the first pixel circuits 10a of different rows are electrically connected to the same second power supply terminal P2, it is impossible to distinguish the on-time of the light-emitting control module 11a of different rows. In this case, in the first mode, the second power supply terminal P2 can always be in a floating state so that the first light-emitting elements 21 of different rows cannot emit light.

[0141] As another example, please refer to Figure 6 The second power supply terminal P2 may include multiple terminals. The second electrodes of multiple first light-emitting elements 21 in the same row can be electrically connected to the same second power supply terminal P2, while the second electrodes of first light-emitting elements 21 in different rows can be electrically connected to different second power supply terminals P2. In the first mode, when the light-emitting control module 11a in the first pixel circuit 10a is in the ON state, the first negative second power supply terminal P2 is in the OFF state; when the light-emitting control module 11a in the first pixel circuit 10a is in the OFF state, the second power supply terminal P2 is in the OFF state. In this case, the signal difference between the first display area and the second display area can be further reduced.

[0142] As described above, the second electrode of the first light-emitting element 21 and the second electrode of the second light-emitting element 22 can be independent of each other. As an example, such as... Figure 7 As shown, the display device 100 may include an array substrate 1. A first light-emitting element 21 and a second light-emitting element 22 of the display panel may be located on one side of the array substrate 1. The first electrode 211, the light-emitting functional layer 213, and the second electrode 212 of the first light-emitting element 21 may be located on one side of the array substrate 1 and are sequentially stacked in a direction away from the array substrate 1; similarly, the first electrode 221, the light-emitting functional layer 223, and the second electrode 222 of the second light-emitting element 22 may be located on one side of the array substrate 1 and are sequentially stacked in a direction away from the array substrate 1. The array substrate 1 may include a substrate and a first pixel circuit 10a and a second pixel circuit 10b located on one side of the substrate.

[0143] The display device 100 may further include a pixel defining portion 4 and an isolation structure 3. The pixel defining portion 4 may include a pixel opening, and a light-emitting functional layer may be disposed within the pixel opening.

[0144] The second electrodes of different light-emitting elements can be disconnected from each other through the isolation structure 3. For example, the isolation structure 3 may include an isolation wall 31 and a blocking portion 32. The projected area of ​​the blocking portion 32 on the array substrate 1 may be larger than the projected area of ​​the isolation wall 31 on the array substrate 1.

[0145] Optionally, in the direction perpendicular to the plane of the array substrate 1, the cross-section of the isolation wall 31 can be I-shaped, trapezoidal, or inverted trapezoidal.

[0146] The isolation wall 31 and the barrier portion 32 may include conductive or insulating materials. For example, in the first display area AA1, the isolation wall 31 between adjacent first light-emitting elements 21 is made of conductive material; in the second display AA2, the isolation wall 31 between adjacent second light-emitting elements 22 is made of conductive material. The isolation wall 31 between the first light-emitting element 21 and the second light-emitting element 22 is made of insulating material, so that the second electrode 212 of the first light-emitting element 21 and the second electrode 222 of the second light-emitting element 22 are independent of each other.

[0147] Figure 7 The way the second electrodes of different light-emitting elements are disconnected from each other is merely an example and is not intended to limit this application. Alternatively, the second electrodes of the light-emitting elements can be patterned using laser technology or other methods to achieve the disconnection of the second electrodes of different light-emitting elements from each other.

[0148] Based on the same inventive concept, this application also provides a driving method for a display device.

[0149] The display device includes:

[0150] The pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in a first display area, and the second pixel circuit is electrically connected to a second light-emitting element in a second display area. The first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and the first electrode of the second light-emitting element, and the second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power terminal is electrically connected to a fourth power terminal.

[0151] The first gate driving circuit is electrically connected to the first pixel circuit;

[0152] The second gate driving circuit is electrically connected to the second pixel circuit;

[0153] The display panel's operating modes include the first mode. For example... Figure 8 As shown, the driving method for the display panel includes S210:

[0154] S210, in the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and at least one of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit is in a floating state when the light emission control module in the first pixel circuit is in a conducting state; and the second gate driving circuit provides a second pulse signal to the second pixel circuit, and the third power supply terminal and the fourth power supply terminal corresponding to the second pixel circuit are in a powered state.

[0155] According to the driving method of the display device provided in the embodiments of this application, in the first mode, when the light-emitting control module of the first pixel circuit is in the on state, at least one of the first power supply terminal and the second power supply terminal is in a floating state, which is equivalent to putting the first light-emitting element in the first display area in an open path. Therefore, the first light-emitting element in the first display area will not emit light, making the first display area appear black. Since the first light-emitting element cannot emit light, the first gate driving circuit can also be in a working state. With both the first gate driving circuit and the second gate driving circuit in a working state, the consistency of the offset state of the transistors in the first pixel circuit and the second pixel circuit can be improved, thereby reducing the brightness difference between the first display area and the second display area, thus helping to improve the performance of the display panel.

[0156] In the driving method for the display device provided in the embodiments of this application, the display surface device includes the display device 100 described in any of the above embodiments, which will not be described in detail here.

[0157] In some embodiments, in a first mode, the amplitude of the first pulse signal and the amplitude of the second pulse signal are the same, and / or the frequency of the first pulse signal and the frequency of the second pulse signal are the same, and / or the duty cycle of the first pulse signal and the duty cycle of the second pulse signal are the same.

[0158] The first pulse signal includes a first A scan signal, which is used to control the writing of data signals of the first pixel circuit. The second pulse signal includes a first B scan signal, which is used to control the writing of data signals of the second pixel circuit. In the first mode, the first A scan signal and the first B scan signal are the same.

[0159] And / or, the first pulse signal includes a second A scan signal, which is used to control the threshold compensation of the driving transistor in the first pixel circuit, and the second pulse signal includes a second B scan signal, which is used to control the threshold compensation of the driving transistor in the second pixel circuit. In the first mode, the second A scan signal and the second B scan signal are the same.

[0160] And / or, the first pulse signal includes a third A scan signal, which is used to control the transmission of the reset signal of the first pixel circuit to the control terminal of the driving module of the first pixel circuit; the second pulse signal includes a third B scan signal, which is used to control the transmission of the reset signal of the second pixel circuit to the control terminal of the driving module of the second pixel circuit; in the first mode, the third A scan signal and the third B scan signal are the same.

[0161] And / or, the first pulse signal includes a fourth A scan signal, which is used to control the transmission of the initialization signal of the first pixel circuit to the first electrode of the first light-emitting element; the second pulse signal includes a fourth B scan signal, which is used to control the transmission of the initialization signal of the second pixel circuit to the first electrode of the second light-emitting element; in the first mode, the fourth A scan signal and the fourth B scan signal are the same.

[0162] And / or, the first pulse signal includes a light emission control signal A, which is used to control the state of the light emission control module of the first pixel circuit, and the second pulse signal includes a light emission control signal B, which is used to control the state of the light emission control module of the second pixel circuit. In the first mode, the light emission control signal A and the light emission control signal B are the same.

[0163] In some embodiments, the method provided in this application further includes:

[0164] In the first mode, the data signal accessed by the first pixel circuit in the i-th row and j-th column is the same as the data signal accessed by the second pixel circuit in the i-th row and j-th column.

[0165] And / or, in the first mode, the reset signal controlling the first pixel circuit is the same as the reset signal controlling the second pixel circuit.

[0166] And / or, in the first mode, the initialization signal controlling the access of the first pixel circuit is the same as the initialization signal controlling the access of the second pixel circuit.

[0167] In some embodiments, the operating mode of the display device further includes a second mode, and the method provided in this application embodiment further includes:

[0168] In the second mode, both the first and second power supply terminals are in a power supply state, and the third and fourth power supply terminals are also in a power supply state.

[0169] Preferably, the display device is a foldable display device, and the method further includes:

[0170] When the display device is in a folded state, control the display device to operate in the first mode;

[0171] Preferably, the method further includes:

[0172] When the display device is in a flattened state, control the display device to operate in the second mode.

[0173] In some embodiments, the first light-emitting elements located in the first display area are distributed in multiple rows, and in the first mode, the first power supply terminal is in a power supply state;

[0174] Multiple first light-emitting elements in the same row are electrically connected to the same second power supply terminal, and first light-emitting elements in different rows are electrically connected to different second power supply terminals. At least when the light-emitting control module of the first pixel circuit is in the ON state, the second power supply terminal is controlled to be in a floating state, including:

[0175] When the light-emitting control module in the first pixel circuit is in the on state, the second power supply terminal is controlled to be in the floating state; when the light-emitting control module in the first pixel circuit is in the off state, the second power supply terminal is controlled to be in the power supply state.

[0176] Alternatively, the first light-emitting elements in different rows are electrically connected to the same second power supply terminal, and at least when the light-emitting control module of the first pixel circuit is in the on state, the second power supply terminal is controlled to be in a floating state, including:

[0177] When the light-emitting control module in the first pixel circuit is in the on state or the off state, the second power supply terminal is in the floating state.

[0178] Based on the same inventive concept, embodiments of this application also provide a display device. The display device may include:

[0179] First display area and second display area;

[0180] The pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in a first display area, and the second pixel circuit is electrically connected to a second light-emitting element in a second display area. The first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and the first electrode of the second light-emitting element, and the second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power terminal is electrically connected to a fourth power terminal.

[0181] The first gate driving circuit is electrically connected to the first pixel circuit;

[0182] The second gate driving circuit is electrically connected to the second pixel circuit;

[0183] The display panel's operating modes include the first mode;

[0184] In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and at least when the light emission control module in the first pixel circuit is in the on state, the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are the same.

[0185] Furthermore, the second gate driving circuit provides a second pulse signal to the second pixel circuit, which has a different potential from the third and fourth power supply terminals corresponding to the second pixel circuit.

[0186] In this embodiment of the application, in the first mode, when the light-emitting control module of the first pixel circuit is in the on state, the potentials of the first power supply terminal and the second power supply terminal are the same. This is equivalent to placing the first light-emitting element in the first display area in a path with zero current, so the first light-emitting element in the first display area does not emit light, making the first display area appear black. Since the first light-emitting element cannot emit light, the first gate driving circuit can also be in the working state. With both the first gate driving circuit and the second gate driving circuit in the working state, the consistency of the offset state of the transistors in the first pixel circuit and the second pixel circuit can be improved, thereby reducing the brightness difference between the first display area and the second display area, which helps to improve the performance of the display panel.

[0187] It should be noted that the similarities between this embodiment and the display device described in the above embodiments will not be repeated. The differences include: in the first mode, both the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are in a power supply state, and the power supply potentials are the same. For example, in the first mode, the potentials of the first power supply terminal and the second power supply terminal are the same positive voltage, or the potentials of the first power supply terminal and the second power supply terminal are the same negative voltage.

[0188] Based on the same inventive concept, this application also provides a driving method for a display device, the display device comprising:

[0189] First display area and second display area;

[0190] The pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in a first display area, and the second pixel circuit is electrically connected to a second light-emitting element in a second display area. The first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and the first electrode of the second light-emitting element, and the second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power terminal is electrically connected to a fourth power terminal.

[0191] The first gate driving circuit is electrically connected to the first pixel circuit;

[0192] The second gate driving circuit is electrically connected to the second pixel circuit;

[0193] The display panel has several operating modes, including the first mode.

[0194] The driving methods include:

[0195] In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and at least when the light emission control module in the first pixel circuit is in the on state, the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are the same.

[0196] Furthermore, the second gate driving circuit provides a second pulse signal to the second pixel circuit, controlling the potentials of the third and fourth power supply terminals corresponding to the second pixel circuit to be different.

[0197] In this embodiment of the application, in the first mode, when the light-emitting control module of the first pixel circuit is in the on state, the potentials of the first power supply terminal and the second power supply terminal are the same. This is equivalent to placing the first light-emitting element in the first display area in a path with zero current, so the first light-emitting element in the first display area does not emit light, making the first display area appear black. Since the first light-emitting element cannot emit light, the first gate driving circuit can also be in the working state. With both the first gate driving circuit and the second gate driving circuit in the working state, the consistency of the offset state of the transistors in the first pixel circuit and the second pixel circuit can be improved, thereby reducing the brightness difference between the first display area and the second display area, which helps to improve the performance of the display panel.

[0198] It should be noted that the similarities between this embodiment and the driving method of the display device described in the above embodiments will not be repeated. The differences include: in the first mode, both the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are in a power supply state, and the power supply potentials are the same. For example, in the first mode, the potentials of the first power supply terminal and the second power supply terminal are the same positive voltage, or the potentials of the first power supply terminal and the second power supply terminal are the same negative voltage.

[0199] It should be noted that the transistors in the embodiments of this application can be either N-type or P-type transistors. For N-type transistors, the on-level is high and the off-level is low. That is, when the gate potential of an N-type transistor is high, its first and second terminals are connected; when the gate potential is low, its first and second terminals are off. For P-type transistors, the on-level is low and the off-level is high. That is, when the gate potential of a P-type transistor is low, its first and second terminals are connected; when the gate potential is high, its first and second terminals are off. In specific implementation, the gate of each transistor is used as its control electrode. Furthermore, depending on the signal and type of the gate of each transistor, its first electrode can be used as the source and its second electrode as the drain, or its first electrode can be used as the drain and its second electrode as the source. No distinction is made here. In addition, the on-level and off-level in the embodiments of this application are general terms. The on-level refers to any level that can turn on the transistor, and the off-level refers to any level that can turn off / turn off the transistor.

[0200] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0201] The aspects of this application have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by dedicated hardware performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0202] The embodiments described above are not exhaustive, nor do they limit the application to the specific embodiments described herein. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display device, characterized in that, include: First display area and second display area; A pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in the first display area, and the second pixel circuit is electrically connected to a second light-emitting element in the second display area. The first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and a first electrode of the second light-emitting element, and the second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power line is electrically connected to a fourth power terminal. The first gate driving circuit is electrically connected to the first pixel circuit; The second gate driving circuit is electrically connected to the second pixel circuit; The display panel's operating modes include the first mode; In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit. At least when the light emission control module in the first pixel circuit is in the on state, at least one of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit is in the floating state. Furthermore, the second gate driving circuit provides a second pulse signal to the second pixel circuit, and the third power supply terminal and the fourth power supply terminal corresponding to the second pixel circuit are in a power supply state; The first light-emitting elements located in the first display area are distributed in multiple rows, and in the first mode, the first power supply terminal is in a power supply state; Multiple first light-emitting elements in the same row are electrically connected to the same second power supply terminal, and first light-emitting elements in different rows are electrically connected to different second power supply terminals; In the first mode, when the light-emitting control module in the first pixel circuit is in the on state, the second power supply terminal is in the floating state; when the light-emitting control module in the first pixel circuit is in the off state, the second power supply terminal is in the power supply state. The first pulse signal includes a light emission control signal A, which is used to control the state of the light emission control module of the first pixel circuit. The second pulse signal includes a light emission control signal B, which is used to control the state of the light emission control module of the second pixel circuit. In the first mode, the light emission control signal A and the light emission control signal B are the same. The display device is a foldable display device, and in the first mode, the display device is in a folded state.

2. The display device according to claim 1, characterized in that, In the first mode, the amplitude of the first pulse signal is the same as the amplitude of the second pulse signal, and / or the frequency of the first pulse signal is the same as the frequency of the second pulse signal, and / or the duty cycle of the first pulse signal is the same as the duty cycle of the second pulse signal.

3. The display device according to claim 2, characterized in that, The first pulse signal includes a first A scan signal, which is used to control the writing of data signals of the first pixel circuit. The second pulse signal includes a first B scan signal, which is used to control the writing of data signals of the second pixel circuit. In the first mode, the first A scan signal and the first B scan signal are the same. And / or, the first pulse signal includes a second A scan signal, which is used to control the threshold compensation of the driving transistor in the first pixel circuit, and the second pulse signal includes a second B scan signal, which is used to control the threshold compensation of the driving transistor in the second pixel circuit. In the first mode, the second A scan signal and the second B scan signal are the same. And / or, the first pulse signal includes a third A scan signal, which is used to control the transmission of the reset signal of the first pixel circuit to the control terminal of the driving module of the first pixel circuit; the second pulse signal includes a third B scan signal, which is used to control the transmission of the reset signal of the second pixel circuit to the control terminal of the driving module of the second pixel circuit; in the first mode, the third A scan signal and the third B scan signal are the same. And / or, the first pulse signal includes a fourth A scan signal, which is used to control the transmission of the initialization signal of the first pixel circuit to the first electrode of the first light-emitting element, and the second pulse signal includes a fourth B scan signal, which is used to control the transmission of the initialization signal of the second pixel circuit to the first electrode of the second light-emitting element. In the first mode, the fourth A scan signal and the fourth B scan signal are the same.

4. The display device according to claim 2, characterized in that, In the first mode, the data signal accessed by the first pixel circuit in the i-th row and j-th column is the same as the data signal accessed by the second pixel circuit in the i-th row and j-th column, i and j are greater than or equal to 1, and i and j are integers.

5. The display device according to claim 1, characterized in that, The operating mode of the display device also includes a second mode, in which the first power terminal and the second power terminal are both in a power supply state, and the third power terminal and the fourth power terminal are in a power supply state.

6. The display device according to claim 5, characterized in that, In the second mode, the display device is in a flattened state.

7. The display device according to claim 1, characterized in that, In the first mode, when the light-emitting control module in the first pixel circuit is in the on state, the second power supply terminal is in the floating state; when the light-emitting control module in the first pixel circuit is in the off state, the second power supply terminal is in the power supply state.

8. The display device according to claim 7, characterized in that, The first pixel circuit includes a driving module, and the light emission control module and the driving module in the first pixel circuit are connected in series between the first power line and the first electrode of the first light emission element.

9. The display device according to claim 7, characterized in that, In the first mode, the first power supply terminal is in a power supply state, and the first power supply terminal and the third power supply terminal are the same power supply terminal.

10. A driving method for a display device, characterized in that, The display device includes: First display area and second display area; A pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in the first display area, and the second pixel circuit is electrically connected to a second light-emitting element in the second display area. The first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and a first electrode of the second light-emitting element, and the second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power line is electrically connected to a fourth power terminal. The first gate driving circuit is electrically connected to the first pixel circuit; The second gate driving circuit is electrically connected to the second pixel circuit; The display panel's operating modes include the first mode; The driving method includes: In the first mode, the first gate driving circuit is controlled to provide a first pulse signal to the first pixel circuit. At least when the light emission control module of the first pixel circuit is in the on state, at least one of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit is controlled to be in the floating state. Furthermore, the second gate driving circuit is controlled to provide a second pulse signal to the second pixel circuit, and the third power supply terminal and the fourth power supply terminal corresponding to the second pixel circuit are controlled to be in a power supply state. The first light-emitting elements located in the first display area are distributed in multiple rows, and in the first mode, the first power supply terminal is in a power supply state; Multiple first light-emitting elements in the same row are electrically connected to the same second power supply terminal, and first light-emitting elements in different rows are electrically connected to different second power supply terminals; In the first mode, when the light-emitting control module in the first pixel circuit is in the on state, the second power supply terminal is in the floating state; when the light-emitting control module in the first pixel circuit is in the off state, the second power supply terminal is in the power supply state. The first pulse signal includes a light emission control signal A, which is used to control the state of the light emission control module of the first pixel circuit. The second pulse signal includes a light emission control signal B, which is used to control the state of the light emission control module of the second pixel circuit. In the first mode, the light emission control signal A and the light emission control signal B are the same. The display device is a foldable display device, and in the first mode, the display device is in a folded state.

11. The method according to claim 10, characterized in that, In the first mode, the amplitude of the first pulse signal is the same as the amplitude of the second pulse signal, and / or the frequency of the first pulse signal is the same as the frequency of the second pulse signal, and / or the duty cycle of the first pulse signal is the same as the duty cycle of the second pulse signal.

12. The method according to claim 11, characterized in that, The first pulse signal includes a first A scan signal, which is used to control the writing of data signals of the first pixel circuit. The second pulse signal includes a first B scan signal, which is used to control the writing of data signals of the second pixel circuit. In the first mode, the first A scan signal and the first B scan signal are the same. And / or, the first pulse signal includes a second A scan signal, which is used to control the threshold compensation of the driving transistor in the first pixel circuit, and the second pulse signal includes a second B scan signal, which is used to control the threshold compensation of the driving transistor in the second pixel circuit. In the first mode, the second A scan signal and the second B scan signal are the same. And / or, the first pulse signal includes a third A scan signal, which is used to control the transmission of the reset signal of the first pixel circuit to the control terminal of the driving module of the first pixel circuit; the second pulse signal includes a third B scan signal, which is used to control the transmission of the reset signal of the second pixel circuit to the control terminal of the driving module of the second pixel circuit; in the first mode, the third A scan signal and the third B scan signal are the same. And / or, the first pulse signal includes a fourth A scan signal, which is used to control the transmission of the initialization signal of the first pixel circuit to the first electrode of the first light-emitting element, and the second pulse signal includes a fourth B scan signal, which is used to control the transmission of the initialization signal of the second pixel circuit to the first electrode of the second light-emitting element. In the first mode, the fourth A scan signal and the fourth B scan signal are the same.

13. The method according to claim 11, characterized in that, The method further includes: In the first mode, the data signal accessed by the first pixel circuit in the i-th row and j-th column is the same as the data signal accessed by the second pixel circuit in the i-th row and j-th column.

14. The method according to claim 10, characterized in that, The operating mode of the display device further includes a second mode, and the method further includes: In the second mode, both the first power supply terminal and the second power supply terminal are controlled to be in a power supply state, and the third power supply terminal and the fourth power supply terminal are also controlled to be in a power supply state.

15. The method according to claim 14, characterized in that, The method further includes: When the display device is in a flattened state, the display device is controlled to operate in the second mode.

16. The method according to claim 10, characterized in that, The step of controlling the second power supply terminal to be in a floating state when at least the light-emitting control module of the first pixel circuit is in a conducting state includes: When the light-emitting control module in the first pixel circuit is in the on state, the second power supply terminal is controlled to be in the floating state; when the light-emitting control module in the first pixel circuit is in the off state, the second power supply terminal is controlled to be in the power supply state.

17. A display device, characterized in that, include: First display area and second display area; A pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in the first display area, and the second pixel circuit is electrically connected to a second light-emitting element in the second display area. The first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and a first electrode of the second light-emitting element, and the second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power line is electrically connected to a fourth power terminal. The first gate driving circuit is electrically connected to the first pixel circuit; The second gate driving circuit is electrically connected to the second pixel circuit; The display panel's operating modes include the first mode; In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and at least when the light emission control module in the first pixel circuit is in the on state, the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are the same. Furthermore, the second gate driving circuit provides a second pulse signal to the second pixel circuit, and the potentials of the third power supply terminal and the fourth power supply terminal corresponding to the second pixel circuit are different. The first light-emitting elements located in the first display area are distributed in multiple rows, and in the first mode, the first power supply terminal is in a power supply state; Multiple first light-emitting elements in the same row are electrically connected to the same second power supply terminal, and first light-emitting elements in different rows are electrically connected to different second power supply terminals; In the first mode, when the light-emitting control module in the first pixel circuit is in the on state, the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are the same; when the light-emitting control module in the first pixel circuit is in the off state, the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are different. The first pulse signal includes a light emission control signal A, which is used to control the state of the light emission control module of the first pixel circuit. The second pulse signal includes a light emission control signal B, which is used to control the state of the light emission control module of the second pixel circuit. In the first mode, the light emission control signal A and the light emission control signal B are the same. The display device is a foldable display device, and in the first mode, the display device is in a folded state.

18. A driving method for a display device, characterized in that, The display device includes: First display area and second display area; A pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is electrically connected to a first light-emitting element in the first display area, and the second pixel circuit is electrically connected to a second light-emitting element in the second display area. The first pixel circuit is electrically connected between a first power line and a first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected to a second power line. The second pixel circuit is electrically connected between a third power line and a first electrode of the second light-emitting element, and the second electrode of the second light-emitting element is electrically connected to a fourth power line. The first power line is electrically connected to a first power terminal, the second power line is electrically connected to a second power terminal, the third power line is electrically connected to a third power terminal, and the fourth power line is electrically connected to a fourth power terminal. The first gate driving circuit is electrically connected to the first pixel circuit; The second gate driving circuit is electrically connected to the second pixel circuit; The display panel's operating modes include the first mode; The driving method includes: In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and at least when the light emission control module in the first pixel circuit is in the on state, controls the potential of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit to be the same. Furthermore, the second gate driving circuit provides a second pulse signal to the second pixel circuit to control the potentials of the third power supply terminal and the fourth power supply terminal corresponding to the second pixel circuit to be different; The first light-emitting elements located in the first display area are distributed in multiple rows, and in the first mode, the first power supply terminal is in a power supply state; Multiple first light-emitting elements in the same row are electrically connected to the same second power supply terminal, and first light-emitting elements in different rows are electrically connected to different second power supply terminals; In the first mode, when the light-emitting control module in the first pixel circuit is in the on state, the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are the same; when the light-emitting control module in the first pixel circuit is in the off state, the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are different. The first pulse signal includes a light emission control signal A, which is used to control the state of the light emission control module of the first pixel circuit. The second pulse signal includes a light emission control signal B, which is used to control the state of the light emission control module of the second pixel circuit. In the first mode, the light emission control signal A and the light emission control signal B are the same. The display device is a foldable display device, and in the first mode, the display device is in a folded state.

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