Display device and driving method thereof

Abstract

The invention 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; the first gate driving circuit is electrically connected with the first pixel circuit; the second gate driving circuit is electrically connected with the second pixel circuit; in the first mode, the first gate drive circuit provides a first pulse signal for the first pixel circuit, and at least one of a first power supply end and a second power supply end corresponding to the first pixel circuit is in a suspended state at least under the condition that a light emitting control module in the first pixel circuit is in a conducting state; and the second gate drive circuit provides a second pulse signal for the second pixel circuit, and the power supply end corresponding to the second pixel circuit is in a power supply state. According to the embodiment of the invention, the use performance of a display product can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device and a driving method thereof. Background Art

[0002] Organic Light Emitting Display (OLED) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

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

[0004] The embodiments of the present application provide a display device and a driving method thereof, which are helpful to improve the performance of display products.

[0005] In a first aspect, an embodiment of the present application provides a display device, comprising: a first display area and a second display area; a pixel circuit, comprising a first pixel circuit and a second pixel circuit, the first pixel circuit being electrically connected to a first light-emitting element in the first display area, and the second pixel circuit being 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 pole of the first light-emitting element, the second pole of the first light-emitting element is electrically connected to the second power line, the second pixel circuit is electrically connected between a third power line and a first pole of the second light-emitting element, the second pole 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; an operating mode of the display panel comprises 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 when a light-emitting control module in the first pixel circuit is in a conducting state, at least one of the first power terminal and the second power terminal corresponding to the first pixel circuit is in a suspended state;

[0006] 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.

[0007] In a possible embodiment of the first aspect, 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;

[0008] Preferably, the first pulse signal includes a first A scanning signal, the first A scanning signal is used to control the writing of the data signal of the first pixel circuit, and the second pulse signal includes a first B scanning signal, the first B scanning signal is used to control the writing of the data signal of the second pixel circuit, and in the first mode, the first A scanning signal and the first B scanning signal are the same;

[0009] And / or, the first pulse signal includes a second A scan signal, the second A scan signal is used to control the threshold compensation of the driving transistor in the first pixel circuit, the second pulse signal includes a second B scan signal, the second B scan signal is used to control the threshold compensation of the driving transistor in the second pixel circuit, and 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, the third A scan signal is used to control the reset signal of the first pixel circuit to be transmitted to the control end of the driving module of the first pixel circuit, the second pulse signal includes a third B scan signal, the third B scan signal is used to control the reset signal of the second pixel circuit to be transmitted to the control end of the driving module of the second pixel circuit, and 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, the fourth A scan signal is used to control the transmission of an initialization signal of the first pixel circuit to the first pole of the first light-emitting element, the second pulse signal includes a fourth B scan signal, the fourth B scan signal is used to control the transmission of an initialization signal of the second pixel circuit to the first pole of the second light-emitting element, and 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 emitting control signal A, the light emitting control signal A is used to control the state of the light emitting control module of the first pixel circuit, and the second pulse signal includes a light emitting control signal B, the light emitting control signal B is used to control the state of the light emitting control module of the second pixel circuit, and in the first mode, the light emitting control signal A and the light emitting control signal B are the same;

[0013] Preferably, in the first mode, the data signal connected to the first pixel circuit in the i-th row and j-th column is the same as the data signal connected to 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 connected to the first pixel circuit is the same as the reset signal connected to the second pixel circuit;

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

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

[0019] In a 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 end is in a power supply state;

[0020] A plurality of 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 a first mode, when the light-emitting control module in the first pixel circuit is in an on state, the second power supply terminal is in a suspended state, and when the light-emitting control module in the first pixel circuit is in an off state, the second power supply terminal is in a power supply state;

[0021] Alternatively, the first light-emitting elements in different rows are electrically connected to the same second power supply terminal, and 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 a suspended 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 terminal is in a power supply state, and the first power terminal and the third power terminal are the same power terminal.

[0024] Based on the same inventive concept, in a second aspect, an embodiment of the present application provides a method for driving a display device, wherein the display device includes:

[0025] a first display area and a second display area;

[0026] A pixel circuit, comprising a first pixel circuit and a second pixel circuit, wherein 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, wherein the first pixel circuit is electrically connected between a first positive power line and a first pole of the first light-emitting element, the second pole of the first light-emitting element is electrically connected to the second power line, the second pixel circuit is electrically connected between a third power line and a first pole of the second light-emitting element, the second pole 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;

[0027] A first gate driving circuit, electrically connected to the first pixel circuit;

[0028] A second gate driving circuit, electrically connected to the second pixel circuit;

[0029] The working mode of the display panel includes a first mode;

[0030] The drive 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, and 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 a suspended state when the light emitting control module of the first pixel circuit is in a conducting state at least;

[0032] 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.

[0033] In a possible embodiment of the second aspect, 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;

[0034] Preferably, the first pulse signal includes a first A scanning signal, the first A scanning signal is used to control the writing of the data signal of the first pixel circuit, and the second pulse signal includes a first B scanning signal, the first B scanning signal is used to control the writing of the data signal of the second pixel circuit, and in the first mode, the first A scanning signal and the first B scanning signal are the same;

[0035] And / or, the first pulse signal includes a second A scan signal, the second A scan signal is used to control the threshold compensation of the driving transistor in the first pixel circuit, the second pulse signal includes a second B scan signal, the second B scan signal is used to control the threshold compensation of the driving transistor in the second pixel circuit, and 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, the third A scan signal is used to control the reset signal of the first pixel circuit to be transmitted to the control end of the driving module of the first pixel circuit, the second pulse signal includes a third B scan signal, the third B scan signal is used to control the reset signal of the second pixel circuit to be transmitted to the control end of the driving module of the second pixel circuit, and 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, the fourth A scan signal is used to control the transmission of an initialization signal of the first pixel circuit to the first pole of the first light-emitting element, the second pulse signal includes a fourth B scan signal, the fourth B scan signal is used to control the transmission of an initialization signal of the second pixel circuit to the first pole of the second light-emitting element, and 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 emitting control signal A, the light emitting control signal A is used to control the state of the light emitting control module of the first pixel circuit, and the second pulse signal includes a light emitting control signal B, the light emitting control signal B is used to control the state of the light emitting control module of the second pixel circuit, and in the first mode, the light emitting control signal A and the light emitting control signal B are the same;

[0039] Preferably, the method further comprises:

[0040] In the first mode, the data signal connected to the first pixel circuit in the i-th row and the j-th column is controlled to be the same as the data signal connected to the second pixel circuit in the i-th row and the j-th column;

[0041] and / or, in the first mode, the reset signal controlling the first pixel circuit to be connected is the same as the reset signal controlling the second pixel circuit to be connected;

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

[0043] In a 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, the first power supply terminal and the second power supply terminal are both controlled to be in a power supply state, and the third power supply terminal and the fourth power supply terminal are controlled to be in a power supply state;

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

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

[0047] Preferably, the method further comprises:

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

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

[0050] A plurality of 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, 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 suspended 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 suspended 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 suspended state, including:

[0053] 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 a suspended state.

[0054] Based on the same inventive concept, in a third aspect, an embodiment of the present application provides a display device, including:

[0055] a first display area and a second display area;

[0056] A pixel circuit, comprising a first pixel circuit and a second pixel circuit, wherein 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, wherein the first pixel circuit is electrically connected between a first power line and a first pole of the first light-emitting element, the second pole of the first light-emitting element is electrically connected to the second power line, the second pixel circuit is electrically connected between a third power line and a first pole of the second light-emitting element, the second pole 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] A first gate driving circuit, electrically connected to the first pixel circuit;

[0058] A second gate driving circuit, electrically connected to the second pixel circuit;

[0059] The working mode of the display panel includes a 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 emitting control module in the first pixel circuit is in the on state, the potential of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are the same;

[0061] 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.

[0062] Based on the same inventive concept, in a fourth aspect, an embodiment of the present application provides a method for driving a display device, wherein the display device comprises:

[0063] a first display area and a second display area;

[0064] A pixel circuit, comprising a first pixel circuit and a second pixel circuit, wherein 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, wherein the first pixel circuit is electrically connected between a first power line and a first pole of the first light-emitting element, the second pole of the first light-emitting element is electrically connected to the second power line, the second pixel circuit is electrically connected between a third power line and a first pole of the second light-emitting element, the second pole 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] A first gate driving circuit, electrically connected to the first pixel circuit;

[0066] A second gate driving circuit, electrically connected to the second pixel circuit;

[0067] The working mode of the display panel includes a first mode;

[0068] The drive methods include:

[0069] In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and 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, at least when the light emitting control module in the first pixel circuit is in the on state;

[0070] 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.

[0071] According to the display device and driving method thereof provided by the embodiment of the present 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 the suspended state, which is equivalent to making the first light emitting element in the first display area in a disconnected path, and the first light emitting element in the first display area will not emit light, so that the first display area can be in a black state. Since the first light emitting element cannot emit light, the first gate driving circuit can also be in the working state, and the first gate driving circuit and the second gate driving circuit are both in the working state, which can improve the consistency of the offset state of the transistors in the first pixel circuit and the second pixel circuit, thereby reducing the brightness difference between the first display area and the second display area, thereby helping to improve the performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0073] Figure 1 A schematic diagram showing a structure of a display device provided in an embodiment of the present application is shown;

[0074] Figure 2 A schematic diagram showing a structure of a display device provided in an embodiment of the present application is shown;

[0075] Figure 3 A schematic diagram showing a structure of a first pixel circuit in a display device provided in an embodiment of the present application is shown;

[0076] Figure 4 A schematic diagram showing a structure of a second pixel circuit in a display device provided in an embodiment of the present application is shown;

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

[0078] Figure 6 Another schematic diagram showing the structure of the display device provided by the embodiment of the present application is shown;

[0079] Figure 7 A schematic diagram showing a cross-sectional structure of a display device provided in an embodiment of the present application is shown;

[0080] Figure 8 A schematic flow chart of a method for driving a display device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

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

[0082] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0083] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0084] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0085] In the embodiments of the present application, the term “electrically connected” may refer to a direct electrical connection between two components, or may refer to an electrical connection between two components via one or more other components.

[0086] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0087] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

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

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

[0090] For example, OLED products can be used as flexible display devices due to their process characteristics, and are therefore often used as foldable display devices. For example, outward-foldable display devices have the advantages of light weight, thin thickness, and low power consumption, and their costs are lower than those of inward-folding display devices, making them more popular among consumers in the display product market.

[0091] The foldable display device may include at least two display areas, one of which is used as the main screen and the other is used as the sub-screen. In order to reflect the overall power consumption advantage of the foldable display product, the main screen and sub-screen design of the foldable display product may adopt an independent gate drive circuit (Gate in Panel, GIP). In the folded state, the main screen can be used to display the picture, the sub-screen can be in a black state, the gate drive circuit of the main screen can be in a working state, and the gate drive circuit of the sub-screen can be in a non-working state (for example, the scanning start signal STV and the light control start signal EIN of the gate drive circuit are turned off). The pixel circuit of the sub-screen enters a high state. After long-term use, the thin film transistor (Thin Film Transistor, TFT) of the pixel circuit of the sub-screen is in a high state for a long time, and the threshold voltage will be offset (Vth shift), resulting in a large difference in the offset state of the transistors in the pixel circuits of the main screen and the sub-screen. In this way, when the full-screen display is switched, the brightness of the main screen and the sub-screen will be inconsistent, resulting in a split screen phenomenon.

[0092] In order to solve the above technical problems, the embodiments of the present application provide a display device and a driving method thereof. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0093] like Figure 1As shown, the display device 100 may include a first display area AA1, a second display area AA2, a pixel circuit and a light emitting element, 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 element includes 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, the second power line ELVSS1 and the fourth power line ELVSS2 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 be independent of each other.

[0097] Exemplarily, in the case that the first power terminal P1 and the third power terminal P3 are different power terminals, the first power line ELVDD1 and the third power line ELVDD2 may also be powered independently.

[0098] In addition, the first pixel circuit 10a and the second pixel circuit 10b both include a light emitting control module. For the sake of distinction, the light emitting control module of the first pixel circuit 10a is marked as 11a, and the light emitting control module of the second pixel circuit 10b is marked as 11b. The light emitting control module can selectively control the light emitting element to enter the light emitting stage. For example, when the first power line ELVDD1 and the second power line ELVSS1 are both in the power supply state and the power supply potentials are different, 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, and 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 on or off of the transistor in the first pixel circuit 10a, and the signal provided by the second gate driving circuit GIP2 can be used to control the on or off of the transistor in the second pixel circuit 10b.

[0100] The working mode of the display device 100 may include a first mode, in which the first gate driving circuit GIP1 provides a first pulse signal to the first pixel circuit 10a, and at least when the light emitting control module 11a of the first pixel circuit 10a is in a conducting 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 suspended state (i.e., a floating state). In addition, 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 power supply state.

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

[0102] It should be noted that the pulse signal refers to: a signal including a high level and a low level. In the first mode, the first gate driving circuit GIP1 and the second gate driving circuit GIP2 can both provide pulse signals, so the first gate driving circuit GIP1 and the second gate driving circuit GIP2 are both in working state.

[0103] In addition, when at least one of the first power supply terminal P1 and the second power supply terminal P2 is in a suspended state, it is equivalent to putting the first light-emitting element 21 in a disconnected path, so that the first light-emitting element 21 cannot emit light, that is, the first light-emitting element 21 is in an illegal light state. The third power supply terminal P3 and the fourth power supply terminal P4 are in a normal power supply state, so the second light-emitting element 22 can emit light normally. It can be understood that the power supply potentials of the third power supply terminal P3 and the fourth power supply terminal P4 are different so that the second light-emitting element 22 can emit light normally. For example, the power supply potential of the third power supply terminal P3 is a positive voltage, and the power supply potential of the fourth power supply terminal P4 is a negative voltage.

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

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

[0106] According to the display device provided by the embodiment of the present application, in the first mode, when the light 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 the suspended state, which is equivalent to making the first light emitting element 21 in the first display area AA1 in a disconnected path, and the first light emitting element 21 in the first display area AA1 does not emit light, so that the first display area AA1 can be in a black state. Since the first light emitting element 21 cannot emit light, the first gate driving circuit GIP1 can also be in the working state, and the first gate driving circuit GIP1 and the second gate driving circuit GIP2 are both in the 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, thereby helping to improve the performance of the display panel.

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

[0108] Of course, this is only an example and is not intended to limit the present application. For example, 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 terminals.

[0109] In some embodiments, in the first mode, the first gate driving circuit GIP1 provides a first pulse signal to the first pixel circuit 10a, and the second gate driving circuit GIP2 provides a second pulse signal to the second pixel circuit 10b, and 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. In this way, the gate control signals connected to the first pixel circuit 10a and the second pixel circuit 10b are the same, 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, which helps to improve the performance of the display panel.

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

[0111] The frequency of a pulse signal refers to the number of pulses that appear in a pulse signal within 1 second. For example, the frequency of the first pulse signal and the frequency of the second pulse signal may both be 60 Hz, or both be 90 Hz, or both be 120 Hz, etc.

[0112] The duty cycle of a pulse signal may refer to the duty cycle of an effective level in one cycle. For example, if a pulse signal controls a P-type transistor, the effective level may be a low level, and if a pulse signal controls an N-type transistor, the effective level may be a high level.

[0113] As an example, the first pixel circuit 10a may include but is not limited to: Figure 3 The structure shown in FIG. 1 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 may 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. In order to distinguish the same functional modules of the first pixel circuit 10a and the second pixel circuit 10b and the control signals connected to the same functional modules, wherein: Figure 3The functional modules of the first pixel circuit 10a are respectively marked as a light emitting control module 11a, a driving module 13a, a data writing module 14a, a threshold compensation module 15a, a reset module 16a and an initialization module 17a, and the connected control signals are respectively marked as S1a, S2a, S3a, S4a and EMa; Figure 4 The functional modules of the second pixel circuit 10b are respectively marked as a light emitting control module 11b, a driving module 13b, a data writing module 14b, a threshold compensation module 15b, a reset module 16b and an initialization module 17b, and the connected control signals are respectively marked as S1b, S2b, S3b, S4b and EMb.

[0115] The connection relationship between each functional module can be found in Figure 3 and Figure 4 , I will not go into details 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, the second A scan signal S2a 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, the second B scan signal S2b is used to control the threshold compensation of the driving transistor in the second pixel circuit 10b, and 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, the third A scan signal S3a is used to control the reset signal Vref1(a) of the first pixel circuit 10a to be transmitted to the control end of the driving module of the first pixel circuit 10a, and the second pulse signal includes a third B scan signal S3b, the third B scan signal S3b is used to control the reset signal Vref1(b) of the second pixel circuit 10b to be transmitted to the control end 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, the fourth A scan signal S4a is used to control the initialization signal Vref2(a) of the first pixel circuit 10a to be transmitted to the first pole of the first light-emitting element 21, and the second pulse signal includes a fourth B scan signal S4b, the fourth B scan signal S4b is used to control the initialization signal Vref2(b) of the second pixel circuit 10b to be transmitted to the first pole 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-emitting control signal A EMa, which is used to control the state of the light-emitting control module 11a of the first pixel circuit 10a, and the second pulse signal includes a light-emitting control signal B EMB, which is used to control the state of the light-emitting control module 11b of the second pixel circuit 10b. In the first mode, the light-emitting control signal A EMa and the light-emitting control signal B EMB are the same.

[0121] It should be noted that the “sameness” of the two signals here may include at least one of the amplitude, frequency, and duty cycle being the same.

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

[0123] In addition, if Figure 5 As shown, in the first mode, the working process 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 emitting phase t13.

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

[0125] In the initialization stage t11 , the third scanning signal S3 a controls the reset module 16 a to be turned on, thereby resetting the potential of the control terminal of the driving module 13 a .

[0126] In the data writing phase t12, the first scanning signal S1a controls the data writing module 14a to be turned on, the second scanning signal S2a controls the threshold compensation module 15a to be turned on, and the voltage of the data signal data(a) after threshold compensation is written into the control end of the driving module 13a.

[0127] In the light-emitting stage t13, the light-emitting control signal EMa controls the light-emitting control module 11a to be turned on, the second power supply terminal P2 electrically connected to the second electrode of the first light-emitting element 21 is in a suspended state, and 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 states 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, the fourth power supply terminal P4 electrically connected to the second electrode of the second light-emitting element 22 is in a power supply state, and the second light-emitting element 22 emits light.

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

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

[0131] It should be noted that Figure 4 In the example, the first power supply terminal P1 is in a power supply state and the second power supply terminal P2 is in a suspended state in the first mode. In other examples, the first power supply terminal P1 may also be in a suspended state in the first mode. In addition, the working process of the pixel circuit of the embodiment of the present application may include Figure 5 The process shown is not limited to this. In addition, Figure 4 In the figure, a solid line indicates that the power supply end is in a power supply state, and a dotted line indicates that the power supply end is in a suspended state.

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

[0133] Exemplarily, the first pixel circuit 10a and the second pixel circuit 10b can be distributed in rows and columns. In the first mode, other signals connected to 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) connected to the first pixel circuit 10a in the i-th row and j-th column and the data signal data(b) connected to 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) connected to the first pixel circuit 10a and the reset signal Vref1(b) connected to the second pixel circuit 10b can be the same; and / or, the initialization signal Vref2(a) connected to the first pixel circuit 10a and the initialization signal Vref2(b) connected to 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 states of the transistors in the two pixel circuits, thereby reducing the brightness difference between the first display area and the second display area, thereby helping to improve the performance of the display panel.

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

[0136] Exemplarily, 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 for display.

[0137] Exemplarily, in the first mode, the power supply terminal electrically connected to the first power line ELVDD1 and the power supply terminal electrically connected to the third power line ELVDD2 can both be in a power supply state. In the second mode, the power supply terminal electrically connected to the first power line ELVDD1 and the power supply terminal electrically connected to the third power line ELVDD2 can both be in a power supply state.

[0138] In some embodiments, Figure 1 As shown, the first light emitting elements 21 located in the first display area AA1 may be distributed in multiple rows.

[0139] As an example, see Figure 1, the second electrodes of the first light emitting elements 21 in different rows can 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 a floating state.

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

[0141] As another example, see Figure 6 , the second power supply terminal P2 may include multiple, the second poles of multiple first light-emitting elements 21 in the same row may be electrically connected to the same second power supply terminal P2, and the second poles of first light-emitting elements 21 in different rows may 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 suspended state, and 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 power supply state. In this case, the difference in the signal accessed by 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 may be independent of each other. Figure 7 As shown, the display device 100 may include an array substrate 1. The first light-emitting element 21 and the second light-emitting element 22 of the display panel may be located at one side of the array substrate 1. The first pole 211, the light-emitting functional layer 213, and the second pole 212 of the first light-emitting element 21 may be located at one side of the array substrate 1, and are sequentially stacked in a direction away from the array substrate 1; the first pole 221, the light-emitting functional layer 223, and the second pole 222 of the second light-emitting element 22 may be located at 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 at 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 in the pixel opening.

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

[0145] Optionally, in a direction perpendicular to the plane where the array substrate 1 is located, the cross section of the isolation wall 31 may be in an I-shape, a regular trapezoid or an inverted trapezoid.

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

[0147] Figure 7 The manner in which the second poles of different light-emitting elements are disconnected from each other is merely an example and is not intended to limit the present application. The second poles of the light-emitting elements may also be patterned by laser technology or the like to achieve the mutual disconnection of the second poles of different light-emitting elements.

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

[0149] The display device comprises:

[0150] A pixel circuit, comprising a first pixel circuit and a second pixel circuit, wherein 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, wherein the first pixel circuit is electrically connected between a first power line and a first pole of the first light-emitting element, the second pole of the first light-emitting element is electrically connected to the second power line, the second pixel circuit is electrically connected between a third power line and a first pole of the second light-emitting element, the second pole 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] A first gate driving circuit, electrically connected to the first pixel circuit;

[0152] A second gate driving circuit, electrically connected to the second pixel circuit;

[0153] The working mode of the display panel includes a first mode. Figure 8 As shown, the driving method of 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 when the light emitting 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 a suspended 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 power supply state.

[0155] According to the driving method of the display device provided by the embodiment of the present 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 the suspended state, which is equivalent to making the first light emitting element in the first display area in a disconnected path, and the first light emitting element in the first display area will not emit light, so that the first display area can be in a black state. Since the first light emitting element cannot emit light, the first gate driving circuit can also be in the working state, and the first gate driving circuit and the second gate driving circuit are both in the working state, which can improve the consistency of the offset state of the transistors in the first pixel circuit and the second pixel circuit, thereby reducing the brightness difference between the first display area and the second display area, thereby helping to improve the performance of the display panel.

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

[0157] In some embodiments, 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.

[0158] The first pulse signal includes a first A scanning signal, the first A scanning signal is used to control the writing of the data signal of the first pixel circuit, the second pulse signal includes a first B scanning signal, the first B scanning signal is used to control the writing of the data signal of the second pixel circuit, in the first mode, the first A scanning signal and the first B scanning signal are the same;

[0159] And / or, the first pulse signal includes a second A scan signal, the second A scan signal is used to control the threshold compensation of the driving transistor in the first pixel circuit, the second pulse signal includes a second B scan signal, the second B scan signal is used to control the threshold compensation of the driving transistor in the second pixel circuit, and 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, the third A scan signal is used to control the reset signal of the first pixel circuit to be transmitted to the control end of the driving module of the first pixel circuit, the second pulse signal includes a third B scan signal, the third B scan signal is used to control the reset signal of the second pixel circuit to be transmitted to the control end of the driving module of the second pixel circuit, and 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, the fourth A scan signal is used to control the transmission of an initialization signal of the first pixel circuit to the first pole of the first light-emitting element, the second pulse signal includes a fourth B scan signal, the fourth B scan signal is used to control the transmission of an initialization signal of the second pixel circuit to the first pole of the second light-emitting element, and 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-emitting control signal A, which is used to control the state of the light-emitting control module of the first pixel circuit; the second pulse signal includes a light-emitting control signal B, which is used to control the state of the light-emitting control module of the second pixel circuit; in the first mode, the light-emitting control signal A and the light-emitting control signal B are the same.

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

[0164] In the first mode, the data signal connected to the first pixel circuit in the i-th row and the j-th column is controlled to be the same as the data signal connected to the second pixel circuit in the i-th row and the j-th column;

[0165] and / or, in the first mode, the reset signal controlling the first pixel circuit to be connected is the same as the reset signal controlling the second pixel circuit to be connected;

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

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

[0168] In the second mode, the first power terminal and the second power terminal are both controlled to be in a power supply state, and the third power terminal and the fourth power terminal are controlled to be in a power supply state.

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

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

[0171] Preferably, the method further comprises:

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

[0173] In some embodiments, the first light emitting elements included 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] A plurality of 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, 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 suspended 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 suspended 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 suspended state, including:

[0177] 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 a suspended state.

[0178] Based on the same inventive concept, the embodiment of the present application further provides a display device. The display device may include:

[0179] a first display area and a second display area;

[0180] A pixel circuit, comprising a first pixel circuit and a second pixel circuit, wherein 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, wherein the first pixel circuit is electrically connected between a first power line and a first pole of the first light-emitting element, the second pole of the first light-emitting element is electrically connected to the second power line, the second pixel circuit is electrically connected between a third power line and a first pole of the second light-emitting element, the second pole 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] A first gate driving circuit, electrically connected to the first pixel circuit;

[0182] A second gate driving circuit, electrically connected to the second pixel circuit;

[0183] The working mode of the display panel includes a 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 emitting control module in the first pixel circuit is in the on state, the potential of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are the same;

[0185] 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.

[0186] In the embodiment of the present 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, which is equivalent to making the first light emitting element in the first display area in a path where the current is 0, and the first light emitting element in the first display area does not emit light, so that the first display area can be in a black state. Since the first light emitting element cannot emit light, the first gate drive circuit can also be in a working state, and the first gate drive circuit and the second gate drive circuit are both in a working state, which can improve the consistency of the offset state of the transistors in the first pixel circuit and the second pixel circuit, thereby reducing the brightness difference between the first display area and the second display area, thereby helping 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 embodiment are not repeated here, and the differences include: in the first mode, the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are both in a power supply state, and the power supply potential is the same. For example, in the first mode, the potential of the first power supply terminal and the second power supply terminal is the same positive voltage, or the potential of the first power supply terminal and the second power supply terminal is the same negative voltage.

[0188] Based on the same inventive concept, an embodiment of the present application further provides a method for driving a display device, wherein the display device comprises:

[0189] a first display area and a second display area;

[0190] A pixel circuit, comprising a first pixel circuit and a second pixel circuit, wherein 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, wherein the first pixel circuit is electrically connected between a first power line and a first pole of the first light-emitting element, the second pole of the first light-emitting element is electrically connected to the second power line, the second pixel circuit is electrically connected between a third power line and a first pole of the second light-emitting element, the second pole 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] A first gate driving circuit, electrically connected to the first pixel circuit;

[0192] A second gate driving circuit, electrically connected to the second pixel circuit;

[0193] The operation mode of the display panel includes a first mode.

[0194] The drive methods include:

[0195] In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and 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, at least when the light emitting control module in the first pixel circuit is in the on state;

[0196] 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.

[0197] In the embodiment of the present 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, which is equivalent to making the first light emitting element in the first display area in a path where the current is 0, and the first light emitting element in the first display area does not emit light, so that the first display area can be in a black state. Since the first light emitting element cannot emit light, the first gate drive circuit can also be in a working state, and the first gate drive circuit and the second gate drive circuit are both in a working state, which can improve the consistency of the offset state of the transistors in the first pixel circuit and the second pixel circuit, thereby reducing the brightness difference between the first display area and the second display area, thereby helping 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 embodiment are not repeated here, and the differences include: in the first mode, the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit are controlled to be in a power supply state, and the power supply potential is the same. For example, in the first mode, the potential of the first power supply terminal and the second power supply terminal is the same positive voltage, or the potential of the first power supply terminal and the second power supply terminal is the same negative voltage.

[0199] It should be noted that the transistor in the embodiment of the present application can be an N-type transistor or a P-type transistor. For an N-type transistor, the on-level is a high level and the off-level is a low level. That is, when the gate potential of the N-type transistor is a high level, the first pole and the second pole are connected, and when the gate potential of the N-type transistor is a low level, the first pole and the second pole are disconnected. For a P-type transistor, the on-level is a low level and the off-level is a high level. That is, when the gate potential of the P-type transistor is a low level, the first pole and the second pole are connected, and when the gate potential of the P-type transistor is a high level, the first pole and the second pole are disconnected. In a specific implementation, the gate of each of the above-mentioned transistors serves as its control electrode, and, according to the signal of the gate of each transistor and its type, its first electrode can be used as the source and the second electrode as the drain, or its first electrode can be used as the drain and the second electrode as the source, without making any distinction here. In addition, the on-level and off-level in the embodiments of the present 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 / shut down the transistor.

[0200] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. 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 embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0201] The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and / or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram.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 can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0202] According to the embodiments described above in the present application, these embodiments do not describe all the details in detail, nor do they limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A display device, characterized in that: include: a first display area and a second display area; A pixel circuit, comprising 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 pole of the first light-emitting element, the second pole 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 pole of the second light-emitting element, the second pole 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 working mode of the display panel 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 when the light emitting control module in the first pixel circuit is in an 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 a suspended 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 power supply 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; Preferably, the first pulse signal includes a first A scanning signal, the first A scanning signal is used to control the writing of the data signal of the first pixel circuit, and the second pulse signal includes a first B scanning signal, the first B scanning signal is used to control the writing of the data signal of the second pixel circuit, and in the first mode, the first A scanning signal and the first B scanning signal are the same; And / or, the first pulse signal includes a second A scan signal, the second A scan signal is used to control the threshold compensation of the driving transistor in the first pixel circuit, the second pulse signal includes a second B scan signal, the second B scan signal is used to control the threshold compensation of the driving transistor in the second pixel circuit, and 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, the third A scan signal is used to control the reset signal of the first pixel circuit to be transmitted to the control end of the driving module of the first pixel circuit, the second pulse signal includes a third B scan signal, the third B scan signal is used to control the reset signal of the second pixel circuit to be transmitted to the control end of the driving module of the second pixel circuit, and 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, the fourth A scan signal is used to control the initialization signal of the first pixel circuit to be transmitted to the first pole of the first light-emitting element, the second pulse signal includes a fourth B scan signal, the fourth B scan signal is used to control the initialization signal of the second pixel circuit to be transmitted to the first pole of the second light-emitting element, and in the first mode, the fourth A scan signal and the fourth B scan signal are the same; And / or, the first pulse signal includes a light emitting control signal A, the light emitting control signal A is used to control the state of the light emitting control module of the first pixel circuit, and the second pulse signal includes a light emitting control signal B, the light emitting control signal B is used to control the state of the light emitting control module of the second pixel circuit, and in the first mode, the light emitting control signal A and the light emitting control signal B are the same; Preferably, in the first mode, the data signal connected to the first pixel circuit in the i-th row and j-th column is the same as the data signal connected to 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; and / or, in the first mode, the reset signal connected to the first pixel circuit is the same as the reset signal connected to the second pixel circuit; And / or, in the first mode, the initialization signal connected to the first pixel circuit is the same as the initialization signal connected to the second pixel circuit.

3. The display device according to claim 1, characterized in that The working mode of the display device further includes a second mode, in which the first power supply terminal and the second power supply terminal are both in a power supply state, and the third power supply terminal and the fourth power supply terminal are in a power supply state; Preferably, the display device is a foldable display device, and in the first mode, the display device is in a folded state; Preferably, in the second mode, the display device is in a flat state.

4. The display device according to claim 1, characterized in that The first light-emitting elements located in the first display area are distributed in a plurality of rows, and in the first mode, the first power supply end is in a power supply state; A plurality of the first light-emitting elements in the same row are electrically connected to the same second power supply terminal, and the 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 suspended state, and 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; Alternatively, the first light-emitting elements in different rows are electrically connected to the same second power supply terminal, and 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 a suspended state; 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; Preferably, in the first mode, the first power terminal is in a power supply state, and the first power terminal and the third power terminal are the same power terminal.

5. A method for driving a display device, characterized in that: The display device comprises: a first display area and a second display area; A pixel circuit, comprising 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 positive power line and a first pole of the first light-emitting element, the second pole 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 pole of the second light-emitting element, the second pole 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 working mode of the display panel includes a first mode; The driving method comprises: In the first mode, the first gate driving circuit is controlled to provide 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 controlled to be in a suspended state when at least the light emitting control module of the first pixel circuit is in a conducting state; 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.

6. The method according to claim 5, 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; Preferably, the first pulse signal includes a first A scanning signal, the first A scanning signal is used to control the writing of the data signal of the first pixel circuit, and the second pulse signal includes a first B scanning signal, the first B scanning signal is used to control the writing of the data signal of the second pixel circuit, and in the first mode, the first A scanning signal and the first B scanning signal are the same; And / or, the first pulse signal includes a second A scan signal, the second A scan signal is used to control the threshold compensation of the driving transistor in the first pixel circuit, the second pulse signal includes a second B scan signal, the second B scan signal is used to control the threshold compensation of the driving transistor in the second pixel circuit, and 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, the third A scan signal is used to control the reset signal of the first pixel circuit to be transmitted to the control end of the driving module of the first pixel circuit, the second pulse signal includes a third B scan signal, the third B scan signal is used to control the reset signal of the second pixel circuit to be transmitted to the control end of the driving module of the second pixel circuit, and 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, the fourth A scan signal is used to control the initialization signal of the first pixel circuit to be transmitted to the first pole of the first light-emitting element, the second pulse signal includes a fourth B scan signal, the fourth B scan signal is used to control the initialization signal of the second pixel circuit to be transmitted to the first pole of the second light-emitting element, and in the first mode, the fourth A scan signal and the fourth B scan signal are the same; And / or, the first pulse signal includes a light emitting control signal A, the light emitting control signal A is used to control the state of the light emitting control module of the first pixel circuit, and the second pulse signal includes a light emitting control signal B, the light emitting control signal B is used to control the state of the light emitting control module of the second pixel circuit, and in the first mode, the light emitting control signal A and the light emitting control signal B are the same; Preferably, the method further comprises: In the first mode, the data signal connected to the first pixel circuit in the i-th row and the j-th column is controlled to be the same as the data signal connected to the second pixel circuit in the i-th row and the j-th column; and / or, in the first mode, the reset signal connected to the first pixel circuit and the reset signal connected to the second pixel circuit are the same; And / or, in the first mode, the initialization signal controlling the first pixel circuit to be connected is the same as the initialization signal controlling the second pixel circuit to be connected.

7. The method according to claim 5, characterized in that The operating mode of the display device further includes a second mode, and the method further includes: In the second mode, 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 controlled to be in a power supply state; Preferably, the display device is a foldable display device, and the method further comprises: When the display device is in a folded state, controlling the display device to operate in the first mode; Preferably, the method further comprises: When the display device is in a flat state, the display device is controlled to operate in the second mode.

8. The method according to claim 5, characterized in that The first light-emitting elements included in the first display area are distributed in a plurality of rows, and in the first mode, the first power supply end is in a power supply state; A plurality of the first light-emitting elements in the same row are electrically connected to the same second power supply terminal, and the first light-emitting elements in different rows are electrically connected to different second power supply terminals, and the second power supply terminal is controlled to be in a suspended state when at least the light-emitting control module of the first pixel circuit is in a conducting state, including: 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 suspended 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; Alternatively, the first light-emitting elements in different rows are electrically connected to the same second power supply terminal, and the second power supply terminal is controlled to be in a suspended state at least when the light-emitting control module of the first pixel circuit is in a conducting state, including: When the light emitting control module in the first pixel circuit is in an on state or an off state, the second power supply terminal is in a suspended state.

9. A display device, characterized in that: include: a first display area and a second display area; A pixel circuit, comprising 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 pole of the first light-emitting element, the second pole 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 pole of the second light-emitting element, the second pole 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 working mode of the display panel 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 when the light emitting control module in the first pixel circuit is in an 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; And 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.

10. A method for driving a display device, characterized in that: The display device comprises: a first display area and a second display area; A pixel circuit, comprising 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 pole of the first light-emitting element, the second pole 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 pole of the second light-emitting element, the second pole 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 working mode of the display panel includes a first mode; The driving method comprises: In the first mode, the first gate driving circuit provides a first pulse signal to the first pixel circuit, and controls the potentials of the first power supply terminal and the second power supply terminal corresponding to the first pixel circuit to be the same at least when the light emitting control module in the first pixel circuit is in the on state; 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.

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