Display panel, driving method thereof, and display device

Abstract

The application discloses a display panel, a driving method thereof and a display device. The display panel comprises at least two pixel circuits and at least one isolation structure. The pixel circuit comprises a light emitting module, a driving module, a threshold compensation module, a data writing module and a coupling module. The first end of the light emitting module is connected with a first power line. The second end of the light emitting module is connected with the first end of the driving module through the isolation structure. The second end of the driving module is connected with a second power line. The isolation structure is overlapped with the second end of the corresponding light emitting module, and is used for isolating the second ends of two adjacent light emitting modules. The threshold compensation module is connected between the control end of the driving module and the first end of the driving module. The data writing module is connected between a data line and the first end of the coupling module. The second end of the coupling module is connected with the control end of the driving module. The data writing stage and the threshold compensation stage do not overlap in time. The technical scheme improves the use performance of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel and its driving method, and a display device. Background Technology

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

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

[0004] This invention provides a display panel and its driving method and display device to improve the performance of the display panel.

[0005] According to one aspect of the present invention, a display panel is provided, the display panel comprising: at least two pixel circuits and at least one isolation structure, wherein the pixel circuits include a light-emitting module, a driving module, a threshold compensation module, a data writing module and a coupling module;

[0006] The first end of the light-emitting module is connected to the first power line, and the second end of the light-emitting module is connected to the first end of the driving module through the isolation structure; the second end of the driving module is connected to the second power line; the isolation structure overlaps with the second end of the corresponding light-emitting module, and the isolation structure is used to isolate the second ends of two adjacent light-emitting modules;

[0007] The threshold compensation module is connected between the control terminal of the drive module and the first terminal of the drive module; the threshold compensation module is used to perform threshold compensation on the drive module during the threshold compensation stage.

[0008] The data writing module is connected between the data line and the first end of the coupling module, and the second end of the coupling module is connected to the control end of the drive module. The data writing module is used to transmit the data voltage on the data line to the first end of the coupling module during the data writing phase, and the coupling module is used to couple the data voltage to the control end of the drive module. The data writing phase and the threshold compensation phase do not overlap in time.

[0009] Optionally, the driving module includes a driving transistor; the drain of the driving transistor is connected to the second terminal of the light-emitting module, and the source of the driving transistor is connected to the second power line;

[0010] Preferably, the first power supply voltage provided by the first power supply line is greater than the second power supply voltage provided by the second power supply line;

[0011] Preferably, the light-emitting module includes a light-emitting diode; the anode of the light-emitting diode is connected to the first power line, and the cathode of the light-emitting diode is connected to the drain of the driving transistor;

[0012] Preferably, the threshold compensation stage occurs before the data writing stage.

[0013] Optionally, the pixel circuit further includes a first reset module, a first light emission control module, and a second light emission control module;

[0014] The first terminal of the first reset module is connected to the first reset signal line or the first power supply line; the second terminal of the first reset module is connected to the second terminal of the light-emitting module.

[0015] The first light-emitting control module is connected between the second end of the light-emitting module and the first end of the driving module; the first reset module is used to transmit the first reset voltage provided by the first reset signal line or the first power supply voltage provided by the first power supply line to the second end of the light-emitting module during the reset phase, and then transmit it to the first end of the driving module through the first light-emitting control module, and finally transmit it to the control end of the driving module through the threshold compensation module.

[0016] The second light-emitting control module is connected between the second end of the driving module and the second power line; the second light-emitting control module is used to transmit the second power supply voltage provided by the second power line to the second end of the driving module during the light-emitting stage;

[0017] Preferably, the control terminal of the first reset module is connected to the first scan line, and the control terminal of the first light emission control module is connected to the first light emission control line.

[0018] The time period during which the first scan signal on the first scan line is at an effective level overlaps with the time period during which the first light emission control signal on the first light emission control line is at an effective level.

[0019] Preferably, the time period during which the first scan signal on the first scan line is at an effective level falls within the time period during which the first light emission control signal on the first light emission control line is at an effective level;

[0020] Preferably, the difference between the first power supply voltage and the first reset voltage is less than the turn-on voltage of the light-emitting module;

[0021] Preferably, one first scan line connects one or two rows of pixel circuits;

[0022] Preferably, the display panel further includes a plurality of cascaded first gate driving circuits, and one first gate driving circuit is connected to one or two rows of pixel circuits through the first scan line.

[0023] Preferably, one of the first light-emitting control lines is connected to one or two rows of the pixel circuits;

[0024] Preferably, the display panel further includes a plurality of cascaded second gate driving circuits, one of which is connected to one or two rows of pixel circuits via the first light-emitting control line.

[0025] Optionally, the second light-emitting control module is used to turn on during the threshold compensation stage, so that the second end of the coupling module discharges to the second power line through the threshold compensation module, the driving module and the second light-emitting control module;

[0026] Preferably, the first light-emitting control module and the second light-emitting control module are used to turn off during the transition phase;

[0027] Preferably, the transition phase occurs after the reset phase and before the threshold compensation phase;

[0028] Preferably, the control terminal of the second light-emitting control module is connected to the second light-emitting control line;

[0029] Preferably, one second light-emitting control line is connected to one or two rows of the pixel circuits;

[0030] Preferably, the display panel further includes multiple cascaded third gate driving circuits, one of the third gate driving circuits being connected to one or two rows of pixel circuits via the second light emission control line.

[0031] Optionally, the pixel circuit further includes a storage module;

[0032] The first end of the storage module is connected to a third power line, and the second end of the storage module is connected to the first end of the coupling module; the storage module is used to maintain the potential of the first end of the coupling module.

[0033] Preferably, the third power supply voltage provided by the third power supply line is the same as the first power supply voltage provided by the first power supply line, and the first power supply line is reused as the third power supply line; or, the third power supply voltage is the same as the second power supply voltage provided by the second power supply line, and the second power supply line is reused as the third power supply line.

[0034] Preferably, the storage module includes a storage capacitor, the first terminal of which is connected to the third power line, and the second terminal of which is connected to the first end of the coupling module.

[0035] Optionally, the pixel circuit further includes a second reset module;

[0036] The first end of the second reset module is connected to the second reset signal line or the second power supply line, and the second end of the second reset module is connected to the first end of the coupling module; the second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module before the data writing stage;

[0037] Preferably, the second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module during the reset phase, the transition phase and the threshold compensation phase.

[0038] Preferably, the control terminal of the data writing module is connected to the second scan line;

[0039] Preferably, the control terminal of the threshold compensation module is connected to the third scan line;

[0040] Preferably, the control terminal of the second reset module is connected to the third scan line;

[0041] Preferably, one second scan line is connected to one row of pixel circuits;

[0042] Preferably, the display panel further includes a plurality of cascaded fourth gate driving circuits, one of the fourth gate driving circuits being connected to a row of pixel circuits via the second scan line;

[0043] Preferably, one of the third scan lines connects to one or two rows of the pixel circuits;

[0044] Preferably, the display panel further includes multiple cascaded fifth gate driving circuits, one of the fifth gate driving circuits being connected to one or two rows of pixel circuits via the third scan line;

[0045] Preferably, the second reset module includes a second reset transistor, the control electrode of the second reset transistor is connected to the third scan line, the first electrode of the second reset transistor is connected to the second reset signal line or the second power supply line, and the second electrode of the second reset transistor is connected to the first end of the coupling module.

[0046] Optionally, the data writing module includes a data writing transistor;

[0047] The control electrode of the data writing transistor is connected to the second scan line, the first electrode of the data writing transistor is connected to the data line, and the second electrode of the data writing transistor is connected to the first end of the coupling module.

[0048] Preferably, the threshold compensation module includes a threshold compensation transistor, the control electrode of the threshold compensation transistor is connected to the third scan line, the first electrode of the threshold compensation transistor is connected to the control terminal of the driving module, and the second electrode of the threshold compensation transistor is connected to the first terminal of the driving module.

[0049] Preferably, the coupling module includes a coupling capacitor, the first terminal of which is connected to the data writing module, and the second terminal of which is connected to the control terminal of the driving module.

[0050] Optionally, the first reset module includes a first reset transistor, the control electrode of the first reset transistor is connected to the first scan line, the first electrode of the first reset transistor is connected to the first reset signal line or the first power supply line, and the second electrode of the first reset transistor is connected to the second end of the light-emitting module.

[0051] Preferably, the first light-emitting control module includes a first light-emitting control transistor, the control electrode of the first light-emitting control transistor is connected to the first light-emitting control line, the first electrode of the first light-emitting control transistor is connected to the second terminal of the light-emitting module through the isolation structure, and the second electrode of the first light-emitting control transistor is connected to the first terminal of the driving module.

[0052] Preferably, the second light-emitting control module includes a second light-emitting control transistor, the control electrode of the second light-emitting control transistor is connected to a second light-emitting control line, the first electrode of the second light-emitting control transistor is connected to the second end of the driving module, and the second electrode of the second light-emitting control transistor is connected to the second power supply line.

[0053] Optionally, the transistors in the pixel circuit are all oxide transistors;

[0054] Preferably, the transistors in the pixel circuit are all N-type transistors.

[0055] Optionally, the display panel further includes a first conductive block, and the isolation structure is electrically connected to a first end of the driving module through the first conductive block.

[0056] Optionally, the isolation structure encloses and forms a plurality of isolation openings, and at least a portion of the light-emitting module is located in the isolation openings; the isolation structure includes a first part and a second part, the first part, the light-emitting module and the second part are arranged along a first direction; the first direction intersects the thickness direction of the display panel;

[0057] The second part is connected to the first conductive block; the second part is located on the surface of the first conductive block;

[0058] Preferably, the display panel includes a substrate; the light-emitting module includes a first electrode; the first electrode is located on one side of the substrate;

[0059] The display panel also includes:

[0060] A pixel definition layer is located on one side of the substrate. The pixel definition layer includes a pixel opening and a pixel definition structure. The pixel opening exposes at least a portion of the first electrode, and a second portion extends through the pixel definition layer. The first portion is located on the side of the pixel definition structure away from the substrate.

[0061] Preferably, the light-emitting module further includes a light-emitting layer and a second electrode; the first electrode, the light-emitting layer and the second electrode are stacked; the first electrode is connected to the first power line and the second electrode is connected to a corresponding isolation structure.

[0062] Optionally, the display panel further includes:

[0063] An active layer is located on one side of the substrate; the driving module includes a driving transistor, the drain of which is located in the active layer.

[0064] A first conductive layer is located on the side of the active layer away from the substrate; the gate of the driving transistor is located on the first conductive layer; the coupling module includes a coupling capacitor, the second terminal of which is located on the first conductive layer;

[0065] The second conductive layer is located on the side of the first conductive layer away from the substrate; the first electrode of the coupling capacitor is located on the second conductive layer;

[0066] A third conductive layer is located on the side of the second conductive layer away from the substrate; the first conductive block is located on the third conductive layer;

[0067] Preferably, the display panel further includes:

[0068] A planarization layer is located on the side of the third conductive layer away from the substrate; the first electrode is located on the side of the planarization layer away from the substrate.

[0069] The pixel definition layer is located on the side of the planarization layer away from the substrate, and the second portion extends through the pixel definition layer and the planarization layer.

[0070] Optionally, the display panel further includes a second conductive block;

[0071] The first electrode is connected to the first power line via the second conductive block;

[0072] Preferably, the first power line is located in the third conductive layer, and the second conductive block is disposed in the same layer as the first electrode; the second conductive block is located on the surface of the third conductive layer.

[0073] Preferably, the second conductive block and the first electrode are integrally formed.

[0074] Preferably, the second power line is located in the third conductive layer.

[0075] Optionally, the display panel further includes a first encapsulation layer, the first encapsulation layer including at least one first encapsulation portion, the first encapsulation portion being located on the side of the light-emitting module away from the substrate;

[0076] Preferably, the first encapsulation portions corresponding to adjacent light-emitting modules are spaced apart;

[0077] Preferably, the display panel further includes a second encapsulation layer, the second encapsulation layer being located on the surface of the first encapsulation portion away from the substrate, and covering the isolation structure and the first encapsulation portion;

[0078] Preferably, the display panel further includes a third encapsulation layer located on the side of the second encapsulation layer away from the substrate.

[0079] According to another aspect of the present invention, a display panel is provided, the display panel comprising: at least two pixel circuits, at least one isolation structure and a first conductive block, wherein the pixel circuits include a light-emitting module and a driving module; the isolation structure is connected to the second end of a corresponding light-emitting module, and the isolation structure is used to isolate the second ends of two adjacent light-emitting modules;

[0080] The isolation structure is electrically connected to the first end of the drive module through the first conductive block.

[0081] Optionally, the isolation structure encloses and forms a plurality of isolation openings, and at least a portion of the light-emitting module is located in the isolation openings; the isolation structure includes a first part and a second part, the first part, the light-emitting module and the second part are arranged along a first direction; the first direction intersects the thickness direction of the display panel;

[0082] The second part is connected to the first conductive block; the second part is located on the surface of the first conductive block;

[0083] Preferably, the display panel includes a substrate; the light-emitting module includes a first electrode; the first electrode is located on one side of the substrate;

[0084] The display panel also includes:

[0085] A pixel definition layer is located on one side of the substrate. The pixel definition layer includes a pixel opening and a pixel definition structure. The pixel opening exposes at least a portion of the first electrode, and a second portion extends through the pixel definition layer. The first portion is located on the side of the pixel definition structure away from the substrate.

[0086] Preferably, the light-emitting module further includes a light-emitting layer and a second electrode; the first electrode, the light-emitting layer, and the second electrode are stacked; the first electrode is connected to a first power line, and the second electrode is connected to a corresponding isolation structure;

[0087] Preferably, the display panel further includes a second conductive block;

[0088] The first electrode is connected to the first power line via the second conductive block;

[0089] Preferably, the second conductive block and the first electrode are integrally formed.

[0090] Preferably, the display panel further includes:

[0091] An active layer is located on one side of the substrate; the driving module includes a driving transistor, the drain of which is located in the active layer.

[0092] A first conductive layer is located on the side of the active layer away from the substrate; the gate of the driving transistor is located on the first conductive layer; the pixel circuit further includes a coupling module; the coupling module includes a coupling capacitor, the second terminal of which is located on the first conductive layer;

[0093] The second conductive layer is located on the side of the first conductive layer away from the substrate; the first electrode of the coupling capacitor is located on the second conductive layer;

[0094] A third conductive layer is located on the side of the second conductive layer away from the substrate; the first conductive block is located on the third conductive layer;

[0095] Preferably, the display panel further includes:

[0096] A planarization layer is located on the side of the third conductive layer away from the substrate; the first electrode is located on the side of the planarization layer away from the substrate.

[0097] The pixel definition layer is located on the side of the planarization layer away from the substrate, and the second portion extends through the pixel definition layer and the planarization layer;

[0098] Preferably, the first power line is located in the third conductive layer, and the second conductive block is disposed in the same layer as the first electrode; the second conductive block is located on the surface of the third conductive layer.

[0099] Preferably, the second conductive block and the first electrode are integrally formed.

[0100] Preferably, the first end of the light-emitting module is connected to the first power line, and the second end of the light-emitting module is connected to the first end of the driving module through the isolation structure; the second end of the driving module is connected to the second power line.

[0101] Preferably, the second power line is located in the third conductive layer;

[0102] Preferably, the pixel circuit further includes a threshold compensation module, which is connected between the control terminal of the driving module and the first terminal of the driving module; the threshold compensation module is used to perform threshold compensation on the driving module during the threshold compensation stage.

[0103] Preferably, the pixel circuit further includes a data writing module, which is connected between the data line and the first end of the coupling module, and the second end of the coupling module is connected to the control terminal of the driving module; the data writing module is used to transmit the data voltage on the data line to the first end of the coupling module during the data writing phase, and the coupling module is used to couple the data voltage to the control terminal of the driving module; the data writing phase and the threshold compensation phase do not overlap in time;

[0104] Preferably, the driving module includes a driving transistor; the drain of the driving transistor is connected to the second terminal of the light-emitting module, and the source of the driving transistor is connected to the second power line;

[0105] Preferably, the first power supply voltage provided by the first power supply line is greater than the second power supply voltage provided by the second power supply line;

[0106] Preferably, the light-emitting module includes a light-emitting diode; the anode of the light-emitting diode is connected to the first power line, and the cathode of the light-emitting diode is connected to the drain of the driving transistor;

[0107] Preferably, the threshold compensation stage is performed before the data writing stage;

[0108] Preferably, the pixel circuit further includes a first reset module, a first light emission control module, and a second light emission control module;

[0109] The first terminal of the first reset module is connected to the first reset signal line or the first power supply line; the second terminal of the first reset module is connected to the second terminal of the light-emitting module.

[0110] The first light-emitting control module is connected between the second end of the light-emitting module and the first end of the driving module; the first reset module is used to transmit the first reset voltage provided by the first reset signal line or the first power supply voltage provided by the first power supply line to the second end of the light-emitting module during the reset phase, and then transmit it to the first end of the driving module through the first light-emitting control module, and finally transmit it to the control end of the driving module through the threshold compensation module.

[0111] The second light-emitting control module is connected between the second end of the driving module and the second power line; the second light-emitting control module is used to transmit the second power supply voltage provided by the second power line to the second end of the driving module during the light-emitting stage;

[0112] Preferably, the control terminal of the first reset module is connected to the first scan line, and the control terminal of the first light emission control module is connected to the first light emission control line.

[0113] The time period during which the first scan signal on the first scan line is at an effective level overlaps with the time period during which the first light emission control signal on the first light emission control line is at an effective level.

[0114] Preferably, the time period during which the first scan signal on the first scan line is at an effective level falls within the time period during which the first light emission control signal on the first light emission control line is at an effective level;

[0115] Preferably, the difference between the first power supply voltage and the first reset voltage is less than the turn-on voltage of the light-emitting module;

[0116] Preferably, the second light-emitting control module is used to turn on during the threshold compensation stage, so that the second end of the coupling module discharges to the second power line through the threshold compensation module, the driving module and the second light-emitting control module;

[0117] Preferably, the first light-emitting control module and the second light-emitting control module are used to turn off during the transition phase;

[0118] Preferably, the transition phase occurs after the reset phase and before the threshold compensation phase;

[0119] Preferably, the control terminal of the second light-emitting control module is connected to the second light-emitting control line;

[0120] Preferably, the pixel circuit further includes a storage module;

[0121] The first end of the storage module is connected to a third power line, and the second end of the storage module is connected to the first end of the coupling module; the storage module is used to maintain the potential of the first end of the coupling module.

[0122] Preferably, the third power supply voltage provided by the third power supply line is the same as the first power supply voltage provided by the first power supply line, and the first power supply line is reused as the third power supply line; or, the third power supply voltage is the same as the second power supply voltage provided by the second power supply line, and the second power supply line is reused as the third power supply line.

[0123] Preferably, the storage module includes a storage capacitor, the first terminal of which is connected to the third power line, and the second terminal of which is connected to the first end of the coupling module.

[0124] Preferably, the pixel circuit further includes a second reset module;

[0125] The first end of the second reset module is connected to the second reset signal line or the second power supply line, and the second end of the second reset module is connected to the first end of the coupling module; the second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module before the data writing stage;

[0126] Preferably, the second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module during the reset phase, the transition phase and the threshold compensation phase.

[0127] Preferably, the control terminal of the data writing module is connected to the second scan line;

[0128] Preferably, the control terminal of the threshold compensation module is connected to the third scan line;

[0129] Preferably, the control terminal of the second reset module is connected to the third scan line;

[0130] Preferably, the second reset module includes a second reset transistor, the control electrode of the second reset transistor is connected to the third scan line, the first electrode of the second reset transistor is connected to the second reset signal line or the second power supply line, and the second electrode of the second reset transistor is connected to the first end of the coupling module.

[0131] According to another aspect of the present invention, a driving method for a display panel is provided. The display panel includes a pixel circuit and an isolation structure. The pixel circuit includes a light-emitting module, a driving module, a threshold compensation module, a data writing module, and a coupling module. A first end of the light-emitting module is connected to a first power line, and a second end of the light-emitting module is connected to the first end of the driving module through the isolation structure. The second end of the driving module is connected to a second power line. The isolation structure overlaps with the second end of a corresponding light-emitting module, and the isolation structure is used to isolate the second ends of two adjacent light-emitting modules. The threshold compensation module is connected between the control terminal of the driving module and the first end of the driving module. The data writing module is connected between a data line and the first end of the coupling module, and the second end of the coupling module is connected to the control terminal of the driving module. The driving method includes:

[0132] During the threshold compensation phase, the threshold compensation module performs threshold compensation on the driving module;

[0133] During the data writing phase, the data writing module transmits the data voltage on the data line to the first end of the coupling module, and the coupling module couples the data voltage to the control end of the drive module; wherein, the data writing phase and the threshold compensation phase do not overlap in time.

[0134] Optionally, the pixel circuit further includes a first reset module, a first light emission control module, and a second light emission control module; a first end of the first reset module is connected to a first reset signal line or a first power supply line; and a second end of the first reset module is connected to a second end of the light emission module.

[0135] The first light-emitting control module is connected between the second end of the light-emitting module and the first end of the driving module;

[0136] The second light-emitting control module is connected between the second end of the driving module and the second power line;

[0137] Prior to the threshold compensation, the driving method further includes:

[0138] During the reset phase, the first reset module transmits the first reset voltage provided by the first reset signal line or the first power supply voltage provided by the first power supply line to the second end of the light-emitting module, and then transmits it to the first end of the driving module through the first light-emitting control module, and finally transmits it to the control end of the driving module through the threshold compensation module.

[0139] The driving method further includes:

[0140] During the light-emitting phase, the second light-emitting control module transmits the second power supply voltage provided by the second power line to the second terminal of the driving module;

[0141] Preferably, the control terminal of the first reset module is connected to the first scan line, and the control terminal of the first light emission control module is connected to the first light emission control line.

[0142] The time period during which the first scan signal on the first scan line is at an effective level overlaps with the time period during which the first light emission control signal on the first light emission control line is at an effective level.

[0143] Preferably, the time period during which the first scan signal on the first scan line is at an effective level falls within the time period during which the first light emission control signal on the first light emission control line is at an effective level;

[0144] Preferably, the difference between the first power supply voltage and the first reset voltage is less than the turn-on voltage of the light-emitting module.

[0145] Optionally, after the reset phase and before the threshold compensation phase, the driving method further includes:

[0146] During the transition phase, the first light-emitting control module and the second light-emitting control module are turned off;

[0147] Preferably, the pixel circuit further includes a second reset module; a first terminal of the second reset module is connected to a second reset signal line or a second power supply line, and a second terminal of the second reset module is connected to a first terminal of the coupling module; in the reset phase, the transition phase, and the threshold compensation phase, the driving method further includes:

[0148] The second reset module transmits the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module.

[0149] According to another aspect of the present invention, a display device is provided, the display device comprising the display panel described in any embodiment of the present invention.

[0150] The technical solution of this invention, by connecting the second end of the driving module to a second power line, ensures that the voltage at the second end of the driving module is fixed during the light-emitting phase, thus preventing voltage fluctuations at the second end of the driving module from affecting the driving current. By separating the data writing phase and the threshold compensation phase in time, even with high display panel resolution and short data writing time, sufficient threshold compensation can be performed, preventing the threshold voltage of the driving module from affecting the driving current generated by the driving module. This ensures stable light emission from the light-emitting module, improves the display effect of the display panel, and ultimately enhances the performance of the display panel.

[0151] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0152] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0153] Figure 1 This is a schematic diagram of a pixel circuit in related technologies;

[0154] Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0155] Figure 3 This is a schematic diagram of a pixel circuit provided in an embodiment of the present invention;

[0156] Figure 4 This is a cross-sectional view of a display panel provided in an embodiment of the present invention;

[0157] Figure 5 This is a schematic diagram of another pixel circuit provided in an embodiment of the present invention;

[0158] Figure 6 This is a schematic diagram of another pixel circuit provided in an embodiment of the present invention;

[0159] Figure 7 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;

[0160] Figure 8 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;

[0161] Figure 9 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;

[0162] Figure 10 This is a schematic diagram of another pixel circuit provided in an embodiment of the present invention;

[0163] Figure 11 This is a schematic diagram of another pixel circuit provided in an embodiment of the present invention;

[0164] Figure 12 This is a schematic diagram of another pixel circuit provided in an embodiment of the present invention;

[0165] Figure 13 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;

[0166] Figure 14 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;

[0167] Figure 15 This is a schematic diagram of another pixel circuit provided in an embodiment of the present invention;

[0168] Figure 16 This is a driving timing diagram of a pixel circuit provided in an embodiment of the present invention;

[0169] Figure 17 This is a driving timing diagram of another pixel circuit provided in an embodiment of the present invention;

[0170] Figure 18 This is a schematic diagram showing the correspondence between data voltage and grayscale in the pixel circuit provided in an embodiment of the present invention;

[0171] Figure 19 This is a schematic diagram of the brightness fluctuation of the light-emitting module corresponding to the pixel circuit in the related technology;

[0172] Figure 20 This is a schematic diagram of the brightness fluctuation of the light-emitting module corresponding to the pixel circuit provided in the embodiment of the present invention;

[0173] Figure 21 This is a schematic diagram illustrating the effect of different data writing times corresponding to the pixel circuit provided in this embodiment of the invention on the brightness of the light-emitting module;

[0174] Figure 22 This is a schematic diagram illustrating the effect of different data writing times corresponding to the pixel circuit provided in this embodiment of the invention on the voltage change at the control terminal of the driving module.

[0175] Figure 23 This is a cross-sectional view of another display panel provided in an embodiment of the present invention;

[0176] Figure 24 This is a cross-sectional view of another display panel provided in an embodiment of the present invention;

[0177] Figure 25 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;

[0178] Figure 26 This is a flowchart of a display panel driving method provided in an embodiment of the present invention;

[0179] Figure 27 This is a flowchart of another display panel driving method provided in an embodiment of the present invention;

[0180] Figure 28 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0181] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0182] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0183] The IGZO (Indium Gallium Zinc Oxide) process exhibits good uniformity in medium and large sizes, therefore the pixel circuits in display panels in related technologies are fabricated using the IGZO process. Figure 1 This is a schematic diagram of a pixel circuit structure in related technologies, such as... Figure 1As shown, the pixel circuit includes a first transistor T01, a second transistor T02, a third transistor T03, a fourth transistor T04, a fifth transistor T05, a sixth transistor T06, and a capacitor Cst. The first transistor T01 can generate a driving current to drive the corresponding organic light-emitting diode (OLED) to emit light. During the initialization phase, the first gate driving signal S01 controls the third transistor T03 and the fourth transistor T04 to turn on, and the second gate driving signal EMO controls the fifth transistor T05 to turn on. The first power supply voltage on the first power line VDD initializes the gate of the first transistor T01 through the fifth transistor T05 and the third transistor T03. The fourth transistor T04 can transmit the initialization voltage Vr1 to the anode of the OLED to initialize the anode. During the data writing and threshold compensation phase, the first gate driving signal S01 controls the third transistor T03 to turn on, and the third gate driving signal S02 controls the second transistor T02 to turn on. The second transistor T02 writes the data voltage on the data line Data to the gate of the first transistor T01 through the second transistor T02, the first transistor T01, and the third transistor T03. During the light-emitting phase, the second gate drive signal EM0 controls the fifth transistor T05 to turn on, the fourth gate drive signal S04 controls the sixth transistor T06 to turn on, and the first transistor T01 generates a drive current to drive the organic light-emitting diode (OLED) to emit light. The cathode of the OLED is connected to the second power supply line VSS.

[0184] Therefore, in the related technology, data writing and threshold compensation are performed in the same stage. When the resolution of the display panel is high, the data writing time is short, which makes it impossible to fully perform threshold compensation. The fluctuation of the threshold voltage of the first transistor T01 will affect the driving current generated by the first transistor T01, thereby affecting the brightness of the corresponding organic light-emitting diode OLED, and thus affecting the display effect of the display panel, that is, affecting the performance of the display panel.

[0185] like Figure 1 As shown, in the pixel circuit of the all-IGZO process in the related technology, the source of the first transistor T01 is connected to the anode of the organic light-emitting diode OLED. However, the anode potential changes under different brightness levels, which causes the gate-source voltage difference of the first transistor T01 to be unstable. This results in poor stability of the driving current generated by the first transistor T01, leading to brightness fluctuations in the organic light-emitting diode OLED, which in turn affects the display effect of the display panel, i.e., affects the performance of the display panel.

[0186] To address the aforementioned technical problems, embodiments of the present invention provide a display panel. Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of a pixel circuit provided in an embodiment of the present invention. Figure 4 This is a cross-sectional view of a display panel provided in an embodiment of the present invention, with reference to... Figure 2 , Figure 3 and Figure 4 The display panel includes at least two pixel circuits 100 and at least one isolation structure 200. The pixel circuit 100 includes a light-emitting module 110, a driving module 120, a threshold compensation module 130, a data writing module 140, and a coupling module 150.

[0187] The first end of the light-emitting module 110 is connected to the first power line VDD, and the second end 111 of the light-emitting module 110 is connected to the first end of the driving module 120 through the isolation structure 200; the second end of the driving module 120 is connected to the second power line VSS; the isolation structure 200 overlaps with the second end 111 of the corresponding light-emitting module 110, and the isolation structure 200 is used to isolate the second ends 111 of two adjacent light-emitting modules 110.

[0188] The threshold compensation module 130 is connected between the control terminal of the drive module 120 and the first terminal of the drive module 120; the threshold compensation module 130 is used to perform threshold compensation on the drive module 120 during the threshold compensation stage.

[0189] The data writing module 140 is connected between the data line Data and the first end of the coupling module 150, and the second end of the coupling module 150 is connected to the control end of the drive module 120. The data writing module 140 is used to transmit the data voltage on the data line Data to the first end of the coupling module 150 during the data writing stage, and the coupling module 150 is used to couple the data voltage to the control end of the drive module 120. The data writing stage and the threshold compensation stage do not overlap in time.

[0190] The light-emitting module 110 may include an organic light-emitting diode (OLED), with its first terminal being the anode and its second terminal being the cathode. The driving module 120 generates a driving current to drive the light-emitting module 110 to emit light. The driving module 120 may include a driving transistor, with its second terminal being the source. The isolation structure 200 isolates the second terminals 111 of two adjacent light-emitting modules 110, allowing the second terminals 111 of two adjacent light-emitting modules 110 to be connected to different driving modules 120. This facilitates individual control of the potential of the second terminal 111 of each light-emitting module 110, thereby allowing individual control of the brightness and timing of each light-emitting module 110.

[0191] Among them, patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118870876A, CN118804633A, CN118870915A, CN118678814A, CN118785762A, CN118678772A, CN118695740A, and CN118678744A record the relevant content of the isolation structure 200 for reference.

[0192] Specifically, by connecting the second end of the driving module 120 to the second power line VSS, the voltage at the second end of the driving module 120 is fixed during the light-emitting stage. This avoids the voltage change at the second end of the driving module 120 from affecting the driving current of the driving module 120, thereby avoiding fluctuations in the light-emitting brightness of the light-emitting module 110, improving the display effect of the display panel, and thus improving the performance of the display panel.

[0193] By setting the data writing phase, the data writing module 140 transmits the data voltage on the data line Data to the control terminal of the driving module 120 through the coupling module 150. In the threshold compensation phase, the threshold compensation module 130 performs threshold compensation on the driving module 120. The data writing phase and the threshold compensation phase do not overlap in time, so that the data writing phase and the threshold compensation phase are separated. Even when the resolution of the display panel is high and the data writing time corresponding to each row of pixel circuit is short, sufficient threshold compensation can be performed to avoid the threshold voltage of the driving module 120 from affecting the driving current generated by the driving module 120. This ensures that the light-emitting module 110 can emit light stably, improves the display effect of the display panel, and thus improves the performance of the display panel.

[0194] By setting up the coupling module 150, since the voltage across the coupling module 150 changes synchronously when the coupling module 150 is coupled, the data voltage is written to the control terminal of the drive module 120 very quickly, so that the pixel circuit of this embodiment has almost no requirement for the data writing time length, thus making it suitable for high-resolution display panels.

[0195] The technical solution of this embodiment, by connecting the second terminal of the driving module to the second power line, ensures that the voltage at the second terminal of the driving module is fixed during the light-emitting phase, thus preventing voltage fluctuations at the second terminal of the driving module from affecting the driving current. By separating the data writing phase and the threshold compensation phase in time, even with high display panel resolution and short data writing time, sufficient threshold compensation can be performed, preventing the threshold voltage of the driving module from affecting the driving current generated by the driving module. This ensures stable light emission from the light-emitting module, improves the display effect of the display panel, and ultimately enhances the performance of the display panel.

[0196] Based on the above technical solutions, the possible structures and specific connection methods of the driving module 120 and the light-emitting module 110 will be described below, but this is not intended to limit this application.

[0197] Figure 5 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention. Optionally, refer to... Figure 5 The driving module 120 includes a driving transistor T1; the drain of the driving transistor T1 is connected to the second terminal of the light-emitting module 110, and the source of the driving transistor T1 is connected to the second power supply line VSS. This ensures that the voltage at the source of the driving transistor T1 is a fixed voltage during the light-emitting phase, thereby guaranteeing a stable voltage difference between the gate and source of the driving transistor T1. This, in turn, allows the driving transistor T1 to generate a stable driving current, which is beneficial for improving the display effect of the display panel. The threshold compensation module 130 is connected between the drain of the driving transistor T1 and the control electrode (gate) of the driving transistor T1.

[0198] Optionally, refer to Figure 5 The first power supply voltage provided by the first power supply line VDD is greater than the second power supply voltage provided by the second power supply line VSS. This creates a voltage difference across the light-emitting branch formed by the light-emitting module 110 and the driving module 120, facilitating the formation of a current loop.

[0199] Optionally, refer to Figure 5 The light-emitting module 110 includes a light-emitting diode (LED) D1. The anode of LED D1 is connected to the first power supply line VDD, and the cathode of LED D1 is connected to the drain of the driving transistor T1. LED D1 can be an organic light-emitting diode (OLED). The connection of the anode of LED D1 to the first power supply line VDD results in a higher voltage at the anode of LED D1, facilitating light emission during the light-emitting phase.

[0200] Optionally, refer to Figure 5The threshold compensation stage precedes the data writing stage. This configuration ensures that the threshold compensation stage and the data writing stage are separated. Furthermore, threshold compensation can be performed on the driver module 120 first, making the voltage at the control terminal of the driver module 120 related to the threshold voltage of the driver transistor T1 within the driver module 120. Consequently, after data writing, the voltage at the control terminal of the driver module 120 is related to both the data voltage and the threshold voltage. This allows the driver module 120 to generate a drive current based on the compensated data voltage, ensuring that the drive current generated by the driver module 120 is independent of the threshold voltage of the driver transistor within the driver module 120.

[0201] Based on the above technical solutions, the following description may also include the structure of the pixel circuit 100, but this is not intended to limit the scope of this application.

[0202] Figure 6 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention. Optionally, refer to... Figure 6 The pixel circuit 100 also includes a first reset module 160, a first light emission control module 170, and a second light emission control module 180.

[0203] The first end of the first reset module 160 is connected to the first reset signal line Vref1 or the first power supply line VDD; the second end of the first reset module 160 is connected to the second end of the light-emitting module 110.

[0204] The first light-emitting control module 170 is connected between the second end of the light-emitting module 110 and the first end of the driving module 120; the first reset module 160 is used to transmit the first reset voltage provided by the first reset signal line Vref1 or the first power supply voltage provided by the first power supply line VDD to the second end of the light-emitting module 110 during the reset phase, and then transmit it to the first end of the driving module 120 through the first light-emitting control module 170, and then transmit it to the control end of the driving module 120 through the threshold compensation module 130.

[0205] The second light-emitting control module 180 is connected between the second end of the driving module 120 and the second power line VSS; the second light-emitting control module 180 is used to transmit the second power supply voltage provided by the second power line VSS to the second end of the driving module 120 during the threshold compensation stage and the light-emitting stage.

[0206] Specifically, during the reset phase, the first reset module 160, the first light-emitting control module 170, and the threshold compensation module 130 are turned on. The first reset module 160 transmits the first reset voltage on the first reset signal line Vref1 or the first power supply voltage provided by the first power supply line VDD to the second terminal of the light-emitting module 110, resetting the second terminal of the light-emitting module 110. This prevents the voltage at the second terminal of the light-emitting module 110 from being affected by the charge of the previous frame, avoiding excessive brightness when the light-emitting module 110 displays a black screen, improving the phenomenon of excessive brightness in black states, and increasing contrast. Furthermore, the first reset module 160 transmits the first reset voltage or the first power supply voltage through the first light-emitting control module 170 and the threshold compensation module 130 to the control terminal of the driver module 120, resetting the control terminal of the driver module 120 and enabling the driver module 120 to conduct, facilitating subsequent threshold compensation. During the reset phase, the second light-emitting control module 180 is not turned on, ensuring that the driver module 120 does not generate driving current, preventing the light-emitting module 110 from emitting light.

[0207] In this way, the first reset module 160 can be used to reset the second terminal of the light-emitting module 110 and the control terminal of the driving module 120, which can reduce the number of transistors and reset signal lines, reduce the space occupied, and help the display panel achieve a higher pixel density.

[0208] During the light-emitting stage, the second light-emitting control module 180 is turned on, and the second power supply voltage provided by the second power supply line VSS is transmitted to the second terminal of the drive module 120, so that the voltage at the second terminal of the drive module 120 is a fixed voltage, thereby ensuring that the drive module 120 generates a stable drive current.

[0209] Optionally, refer to Figure 6 The control terminal of the first reset module 160 is connected to the first scan line S1, and the control terminal of the first light emission control module 170 is connected to the first light emission control line EM1.

[0210] The period during which the first scan signal on the first scan line S1 is at an effective level overlaps with the period during which the first light emission control signal on the first light emission control line EM1 is at an effective level. This overlaps the period during which the first reset module 160 is turned on with the period during which the first light emission control module 170 is turned on. This allows the first reset module 160 to transmit the first reset voltage or the first power supply voltage to the control terminal of the drive module 120 via the first light emission control module 170 and the threshold compensation module 130, resetting the control terminal of the drive module 120 and enabling the drive module 120 to turn on, facilitating subsequent threshold compensation.

[0211] Optionally, refer to Figure 6The period during which the first scan signal on the first scan line S1 is at an effective level coincides with the period during which the first light emission control signal on the first light emission control line EM1 is at an effective level. That is, the effective level of the first light emission control signal encompasses the effective level of the first scan signal, ensuring that when the first reset module 160 is turned on, the first light emission control module 170 is in a turned-on state.

[0212] Optionally, refer to Figure 6 The difference between the first power supply voltage and the first reset voltage is less than the turn-on voltage of the light-emitting module 110. This setting ensures that the light-emitting module 110 will not emit light during the reset phase, thus avoiding affecting the display effect of the display panel.

[0213] Figure 7 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Optionally, refer to... Figure 7 One first scan line S1 connects to one or two rows of pixel circuits 100. When one first scan line S1 connects to one row of pixel circuits 100, line-by-line scanning can be achieved. When one first scan line S1 connects to two rows of pixel circuits 100, the number of traces and the number of scan signals can be reduced.

[0214] Optionally, refer to Figure 7 The display panel also includes multiple cascaded first gate driving circuits 201, and one first gate driving circuit 201 is connected to one or two rows of pixel circuits 100 through the first scan line S1.

[0215] Specifically, one first gate driving circuit 201 is connected to one row of pixel circuits 100 via a first scan line S1, meaning one first gate driving circuit 201 corresponds to one row of pixel circuits 100. The first gate driving circuit 201 can output a first scan signal to the corresponding pixel circuit 100 to control the first reset module 160 in the pixel circuit 100. One first gate driving circuit 201 is connected to two rows of pixel circuits 100 via the first scan line S1, meaning one first gate driving circuit 201 corresponds to two rows of pixel circuits 100. This reduces the number of first gate driving circuits 201, making it easier to achieve a narrow bezel.

[0216] It should be noted that, Figure 7 The image shows a case where a first gate drive circuit is connected to two rows of pixel circuits via a first scan line, but this is not a limitation.

[0217] Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Optionally, refer to... Figure 8One first light-emitting control line EM1 connects to one or two rows of pixel circuits 100. When one first light-emitting control line EM1 connects to one row of pixel circuits 100, line-by-line scanning can be achieved. When one first light-emitting control line EM1 connects to two rows of pixel circuits 100, the number of traces and the number of light-emitting control signals can be reduced.

[0218] Optionally, refer to Figure 8 The display panel also includes multiple cascaded second gate driving circuits 202, and one second gate driving circuit 202 is connected to one or two rows of pixel circuits 100 through the first light emission control line EM1.

[0219] Specifically, one second gate driving circuit 202 is connected to one row of pixel circuits 100 via the first light-emitting control line EM1, meaning one second gate driving circuit 202 corresponds to one row of pixel circuits 100. The second gate driving circuit 202 can output a first light-emitting control signal to the corresponding pixel circuit 100, thereby controlling the first light-emitting control module 170 in the pixel circuit 100. One second gate driving circuit 202 is also connected to two rows of pixel circuits 100 via the first light-emitting control line EM1, meaning one second gate driving circuit 202 corresponds to two rows of pixel circuits 100. This reduces the number of second gate driving circuits 202, making it easier to achieve a narrow bezel.

[0220] It should be noted that, Figure 8 The diagram shows a second gate driving circuit 202 connected to two rows of pixel circuits 100 via a first light emission control line EM1, but it is not limited to this case.

[0221] Based on the above technical solution, optionally, the second light-emitting control module 180 is used to turn on during the threshold compensation stage, so that the second end of the coupling module 150 discharges to the second power line VSS through the threshold compensation module 130, the driving module 120 and the second light-emitting control module 180.

[0222] Specifically, during the threshold compensation stage, the threshold compensation module 130, the driving module 120, and the second light-emitting control module 180 are turned on, allowing the second power supply voltage Vss to be transmitted to the second terminal of the coupling module 150 via the second light-emitting control module 180, the driving module 120, and the threshold compensation module 130. In other words, the second terminal of the coupling module 150 discharges to the second power line VSS via the threshold compensation module 130, the driving module 120, and the second light-emitting control module 180 until the voltage at the second terminal of the coupling module 150 (the control terminal of the driving module 120) reaches Vss + Vth, at which point the driving module 120 is turned off. Here, Vth is the threshold voltage of the driving transistor T1 in the driving module 120. This makes the voltage at the control terminal of the driving module 120 related to the threshold voltage of the driving transistor T1, thus achieving threshold compensation for the driving module 120.

[0223] Optionally, the first light-emitting control module 170 and the second light-emitting control module 180 are used to be turned off during the transition phase. In this way, a transition can be performed before the first light-emitting control module 170 or the second light-emitting control module 180 is turned on, avoiding the simultaneous turn-on of the first light-emitting control module 170 and the second light-emitting control module 180 during the non-light-emitting phase, thereby preventing the light-emitting module 110 from emitting light during the non-light-emitting phase.

[0224] Optionally, the transition phase occurs after the reset phase and before the threshold compensation phase.

[0225] Specifically, during the reset phase, the first light-emitting control module 170 is turned on and the second light-emitting control module 180 is not turned on. During the threshold compensation phase, the first light-emitting control module 170 is not turned on and the second light-emitting control module 180 is turned on. By setting a transition phase between the reset phase and the threshold compensation phase, it is possible to avoid the first light-emitting control module 170 and the second light-emitting control module 180 being turned on simultaneously during the non-light-emitting phase, thereby preventing the light-emitting module 110 from emitting light during the non-light-emitting phase.

[0226] Optionally, refer to Figure 6 The control terminal of the second light-emitting control module 180 is connected to the second light-emitting control line EM2. This allows the second light-emitting control signal on the second light-emitting control line EM2 to control whether the second light-emitting control module 180 is turned on.

[0227] Figure 9 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Optionally, refer to... Figure 9 One second light-emitting control line EM2 connects to one or two rows of pixel circuits 100. When one second light-emitting control line EM2 connects to one row of pixel circuits 100, line-by-line scanning can be achieved. When one second light-emitting control line EM2 connects to two rows of pixel circuits 100, the number of traces and the number of light-emitting control signals can be reduced.

[0228] Optionally, refer to Figure 9 The display panel also includes multiple cascaded third gate driving circuits 203, and one third gate driving circuit 203 is connected to one or two rows of pixel circuits 100 through the second light emission control line EM2.

[0229] Specifically, one third gate driving circuit 203 is connected to one row of pixel circuits 100 via the second light-emitting control line EM2, meaning one third gate driving circuit 203 corresponds to one row of pixel circuits 100. The third gate driving circuit 203 can output a second light-emitting control signal to the corresponding pixel circuit 100, thereby controlling the second light-emitting control module 180 in the pixel circuit 100. One third gate driving circuit 203 is also connected to two rows of pixel circuits 100 via the second light-emitting control line EM2, meaning one third gate driving circuit 203 corresponds to two rows of pixel circuits 100. This reduces the number of third gate driving circuits 203, making it easier to achieve a narrow bezel.

[0230] It should be noted that, Figure 9 The diagram shows a third gate drive circuit 203 connected to two rows of pixel circuits 100 via a second light emission control line EM2, but it is not limited to this case.

[0231] Based on the above technical solutions, the following description may also include the structure of the pixel circuit 100, but this is not intended to limit the scope of this application.

[0232] Figure 10 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention. Optionally, refer to... Figure 10 The pixel circuit 100 also includes a storage module 191;

[0233] The first end of the storage module 191 is connected to the third power line V3, and the second end of the storage module 191 is connected to the first end of the coupling module 150; the storage module 191 is used to maintain the potential of the first end of the coupling module 150.

[0234] Specifically, the first end of the storage module 191 is connected to the third power line V3, so that the voltage of the first end of the storage module 191 is a fixed voltage. This allows the storage module 191 to maintain the potential of the first end of the coupling module 150, and in turn maintain the potential of the control end of the driving module 120. This enables the driving module 120 to generate a stable driving current during the light-emitting stage, which is beneficial to improving the display effect of the display panel.

[0235] Optionally, the third power supply voltage provided by the third power line V3 is the same as the first power supply voltage provided by the first power line VDD, and the first power line VDD is reused as the third power line V3; or, the third power supply voltage is the same as the second power supply voltage provided by the second power line VSS, and the second power line VSS is reused as the third power line V3. This reduces the number of traces, thereby saving space and facilitating an increase in the pixel density of the display panel.

[0236] Figure 11 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention. Optionally, refer to... Figure 11 The storage module 191 includes a storage capacitor C1. The first terminal of the storage capacitor C1 is connected to the third power supply line V3, and the second terminal of the storage capacitor C1 is connected to the first terminal of the coupling module 150. In this way, the storage capacitor C1 can maintain the potential of the first terminal of the coupling module 150.

[0237] Figure 12 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention. Optionally, refer to... Figure 12 The pixel circuit 100 also includes a second reset module 192;

[0238] The first end of the second reset module 192 is connected to the second reset signal line Vref2 or the second power supply line VSS, and the second end of the second reset module 192 is connected to the first end of the coupling module 150. The second reset module 192 is used to transmit the second reset voltage provided by the second reset signal line Vref2 or the second power supply voltage provided by the second power supply line VSS to the first end of the coupling module 150 before the data writing stage.

[0239] Specifically, before the data writing stage, the second reset module 192 is turned on, causing it to transmit the second reset voltage provided by the second reset signal line Vref2 or the second power supply voltage provided by the second power supply line VSS to the first terminal of the coupling module 150. This resets the first terminal of the coupling module 150, maintaining its voltage at the second reset voltage or the second power supply voltage. In this way, the potential of the first terminal of the coupling module 150 remains constant before data writing, ensuring that voltage changes at the first terminal of the coupling module 150 are only related to the second reset voltage (or the second power supply voltage) and the data voltage, without introducing other changes, thus making the data voltage writing more accurate.

[0240] Optionally, refer to Figure 12 The second reset module 192 is used to transmit the second reset voltage provided by the second reset signal line Vref2 or the second power supply voltage provided by the second power supply line VSS to the first end of the coupling module 150 during the reset phase, transition phase and threshold compensation phase.

[0241] Specifically, during the reset and transition phases, the second reset module 192 transmits the second reset voltage provided by the second reset signal line Vref2 or the second power supply voltage provided by the second power supply line VSS to the first terminal of the coupling module 150 to reset the first terminal of the coupling module 150. During the threshold compensation phase, the second reset module 192 continues to transmit the second reset voltage or the second power supply voltage to the first terminal of the coupling module 150, maintaining the potential of the first terminal of the coupling module 150, thereby allowing the second terminal of the coupling module 150 to discharge until the voltage at the second terminal of the coupling module 150 (the control terminal of the drive module 120) reaches Vss + Vth, at which point the drive module 120 is turned off. Here, Vth is the threshold voltage of the drive transistor T1 in the drive module 120. In this way, the voltage at the control terminal of the drive module 120 is correlated with the threshold voltage of the drive transistor T1, achieving threshold compensation for the drive module 120.

[0242] Optionally, refer to Figure 12 The control terminal of the data writing module 140 is connected to the second scan line S2. This allows the second scan signal on the second scan line S2 to control whether the data writing module 140 is turned on, thereby controlling the timing of data writing.

[0243] Optionally, refer to Figure 12 The control terminal of the threshold compensation module 130 is connected to the third scan line S3. This allows the third scan signal on the third scan line S3 to control whether the threshold compensation module 130 is turned on.

[0244] Optionally, refer to Figure 12 The control terminal of the second reset module 192 is connected to the third scan line S3. This allows the third scan signal on the third scan line S3 to control whether the second reset module 192 is turned on. Furthermore, the second reset module 192 and the threshold compensation module 130 are connected to the same scan line, which reduces the number of traces, thereby reducing the space occupied and facilitating a higher pixel density in the display panel.

[0245] Figure 13 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Optionally, refer to... Figure 13 Each second scan line S2 is connected to a corresponding row of pixel circuits 100. This facilitates row-by-row scanning, thereby enabling the writing of data voltages row by row.

[0246] Optionally, refer to Figure 13The display panel also includes multiple cascaded fourth gate driving circuits 204, each fourth gate driving circuit 204 being connected to a corresponding row of pixel circuits 100 via a second scan line S2. The fourth gate driving circuit 204 can output a second scan signal, thereby controlling the data writing module 140 in the corresponding pixel circuit 100.

[0247] Figure 14 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Optionally, refer to... Figure 14 One third scan line S3 connects to one or two rows of pixel circuits 100. When one third scan line S3 connects to one row of pixel circuits 100, line-by-line scanning can be achieved. When one third scan line S3 connects to two rows of pixel circuits 100, the number of traces and the number of scan signals can be reduced.

[0248] Optionally, refer to Figure 14 The display panel also includes multiple cascaded fifth gate driving circuits 205, and one fifth gate driving circuit 205 is connected to one or two rows of pixel circuits 100 via the third scan line S3.

[0249] Specifically, one fifth gate driving circuit 205 is connected to one row of pixel circuits 100 via the third scan line S3, meaning one fifth gate driving circuit 205 corresponds to one row of pixel circuits 100. The fifth gate driving circuit 205 can output a third scan signal to the corresponding pixel circuit 100 to control the second reset module 192 and the threshold compensation module 130 in the pixel circuit 100. One fifth gate driving circuit 205 is connected to two rows of pixel circuits 100 via the third scan line S3, meaning one fifth gate driving circuit 205 corresponds to two rows of pixel circuits 100. This reduces the number of fifth gate driving circuits 205, making it easier to achieve a narrow bezel.

[0250] It should be noted that, Figure 14 The diagram shows a fifth gate drive circuit 205 connected to two rows of pixel circuits 100 via a third scan line S3, but it is not limited to this case.

[0251] Figure 15 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention. Optionally, refer to... Figure 15 The second reset module 192 includes a second reset transistor T2. The control electrode of the second reset transistor T2 is connected to the third scan line S3. The first electrode of the second reset transistor T2 is connected to the second reset signal line Vref2 or the second power supply line VSS. The second electrode of the second reset transistor T2 is connected to the first end of the coupling module 150.

[0252] Specifically, during the reset phase, transition phase, and threshold compensation phase, the third scan signal on the third scan line S3 controls the second reset transistor T2 to turn on. The second reset transistor T2 transmits the second reset voltage or the second power supply voltage to the first terminal of the coupling module 150 to reset the first terminal of the coupling module 150 and maintain the voltage of the first terminal of the coupling module 150 as the second reset voltage or the second power supply voltage.

[0253] Based on the above technical solutions, the following describes the possible structures of other modules in the pixel circuit 100, but this is not intended to limit the scope of this application.

[0254] Optionally, refer to Figure 15 The data writing module 140 includes a data writing transistor T3;

[0255] The control electrode of the data writing transistor T3 is connected to the second scan line S2, the first electrode of the data writing transistor T3 is connected to the data line Data, and the second electrode of the data writing transistor T3 is connected to the first terminal of the coupling module 150. Thus, during the data writing phase, the second scan signal on the second scan line S2 controls the data writing module 140 to conduct, and the data writing module 140 transmits the data voltage on the data line Data to the first terminal of the coupling module 150, enabling the coupling module 150 to couple the data voltage to the control electrode of the driving transistor T1.

[0256] Optionally, refer to Figure 15 The threshold compensation module 130 includes a threshold compensation transistor T4. The control electrode of the threshold compensation transistor T4 is connected to the third scan line S3, the first electrode of the threshold compensation transistor T4 is connected to the control terminal of the driving module 120, and the second electrode of the threshold compensation transistor T4 is connected to the first terminal of the driving module 120. Thus, during the threshold compensation stage, the third scan signal on the third scan line S3 can control the threshold compensation transistor T4 to turn on, causing the threshold compensation transistor T4 to perform threshold compensation on the driving transistor T1.

[0257] Optionally, refer to Figure 15 The coupling module 150 includes a coupling capacitor C2. The first terminal of the coupling capacitor C2 is connected to the data writing module 140, and the second terminal of the coupling capacitor C2 is connected to the control terminal of the drive module 120. In this way, the coupling capacitor C2 can couple the data voltage transmitted by the data writing module 140 to the control terminal of the drive module 120, so that the drive module 120 can generate a drive current according to the data voltage.

[0258] Optionally, refer to Figure 15The first reset module 160 includes a first reset transistor T5. The control electrode of the first reset transistor T5 is connected to the first scan line S1, and the first electrode of the first reset transistor T5 is connected to the first reset signal line Vref1 or the first power supply line VDD. The second electrode of the first reset transistor T5 is connected to the second terminal of the light-emitting module 110. Thus, during the reset phase, the first scan signal on the first scan line S1 controls the first reset transistor T5 to conduct, enabling the first reset transistor T5 to transmit the first reset voltage on the first reset signal line Vref1 or the first power supply voltage on the first power supply line VDD to the second terminal of the light-emitting module 110, thereby resetting the second terminal of the light-emitting module 110.

[0259] Optionally, refer to Figure 15 The first light-emitting control module 170 includes a first light-emitting control transistor T6. The control electrode of the first light-emitting control transistor T6 is connected to the first light-emitting control line EM1. The first electrode of the first light-emitting control transistor T6 is connected to the second terminal of the light-emitting module 110, and the second electrode of the first light-emitting control transistor T6 is connected to the first terminal of the driving module 120. Thus, during the reset phase, the first light-emitting control signal on the first light-emitting control line EM1 controls the first light-emitting control transistor T6 to conduct, allowing the first reset transistor T5 to reset the control electrode of the driving transistor T1 via the first light-emitting control transistor T6 and the threshold compensation transistor T4. Furthermore, during the light-emitting phase, the first light-emitting control signal on the first light-emitting control line EM1 controls the first light-emitting control transistor T6 to conduct, allowing the driving transistor T1 to generate a driving current, driving the light-emitting diode D1 to emit light.

[0260] Optionally, refer to Figure 15 The second light-emitting control module 180 includes a second light-emitting control transistor T7. The control electrode of the second light-emitting control transistor T7 is connected to the second light-emitting control line EM2. The first electrode of the second light-emitting control transistor T7 is connected to the second terminal of the driving module 120, and the second electrode of the second light-emitting control transistor T7 is connected to the second power supply line VSS. Thus, during the light-emitting phase, the second light-emitting control signal on the second light-emitting control line EM2 controls the second light-emitting control transistor T7 to conduct, causing the source of the driving transistor T1 to be connected to the second power supply line VSS through the second light-emitting control transistor T7. This keeps the source potential of the driving transistor T1 constant, thereby ensuring that the driving transistor T1 generates a stable driving current.

[0261] Based on the above technical solution, optionally, all transistors in the pixel circuit 100 are oxide transistors. This allows for a pixel circuit 100 composed entirely of IGZO transistors, reducing leakage current and improving the display performance of the display panel. Alternatively, all transistors in the pixel circuit 100 are N-type transistors.

[0262] The following description of the operation of the pixel circuit 100, in conjunction with its structure and driving timing, is intended to limit the scope of this application.

[0263] Figure 16 This is a driving timing diagram of a pixel circuit provided in an embodiment of the present invention. Optionally, refer to... Figure 15 and Figure 16 The working process of a pixel circuit includes the following stages.

[0264] During the reset phase t1, the first scan signal Scan1 on the first scan line S1 is at a high level, the third scan signal Scan3 on the third scan line S3 is at a high level, the first light emission control signal Em1 on the first light emission control line EM1 is at a high level, the first reset transistor T5, the threshold compensation transistor T4, the first light emission control transistor T6, and the second reset transistor T2 are turned on. The first reset transistor T5 transmits the first reset voltage Vre1 on the first reset signal line Vref1 or the first power supply voltage Vdd provided by the first power supply line VDD to the cathode of the light emission diode D1, resetting the cathode of the light emission diode D1. This can prevent the voltage of the cathode of the light emission diode D1 from being affected by the charge of the previous frame, avoid excessive brightness when the light emission diode D1 displays a black screen, improve the phenomenon of excessive brightness in black states, and improve the contrast. Furthermore, the first reset transistor T5 transmits the first reset voltage Vre1 or the first power supply voltage Vdd through the first light-emitting control transistor T6 and the threshold compensation transistor T4 to the control gate N1 of the driving transistor T1, resetting the control gate N1 of the driving transistor T1 and enabling the driving transistor T1 to conduct, facilitating subsequent threshold compensation. During the reset phase, the second light-emitting control transistor T7 is not turned on, ensuring that the driving transistor T1 does not generate a driving current, thus preventing the light-emitting diode D1 from emitting light.

[0265] Furthermore, the second reset transistor T2 transmits the second power supply voltage Vss on the second power supply line VSS or the second reset voltage Vre2 on the second reset signal line Vref2 to the first terminal N2 of the coupling capacitor C2, thus resetting the first terminal N2 of the coupling capacitor C2. Therefore, during the reset phase t1, the voltage Vre2 on the control terminal (gate) N1 of the driving transistor T1 is... N1 =Vdd or V N1 =Vre1, the voltage V at the first terminal N2 of coupling capacitor C2. n2 =Vss or V N2 =Vre2.

[0266] During the transition phase t2, the first light-emitting control signal Em1 on the first light-emitting control line EM1 and the second light-emitting control signal Em2 on the second light-emitting control line EM2 are at a low level, while the third scan signal Scan3 on the third scan line S3 is at a high level. The second reset transistor T2 transmits the second power supply voltage Vss on the second power supply line VSS or the second reset voltage Vre2 on the second reset signal line Vref2 to the first terminal N2 of the coupling capacitor C2, maintaining the voltage at the first terminal N2 of the coupling capacitor C2 at V. N2 =Vss or V N2 =Vre2. Both the first light-emitting control transistor T6 and the second light-emitting control transistor T7 are turned off. A transition can occur before the first light-emitting control transistor T6 is turned on and the second light-emitting control transistor T7 is turned off, which avoids the first light-emitting control transistor T6 and the second light-emitting control transistor T7 being turned on at the same time during the non-light-emitting stage, thereby preventing the light-emitting diode D1 from emitting light during the non-light-emitting stage.

[0267] During the threshold compensation stage t3, the third scan signal Scan3 on the third scan line S3 is at a high level, and the second light emission control signal Em2 on the second light emission control line EM2 is at a high level. The second reset transistor T2, the threshold compensation transistor T4, and the second light emission control transistor T7 are turned on. The second reset transistor T2 transmits the second power supply voltage Vss on the second power supply line VSS or the second reset voltage Vre2 on the second reset signal line Vref2 to the first terminal N2 of the coupling capacitor C2, maintaining the voltage at the first terminal N2 of the coupling capacitor C2 at V. N2 =Vss or V N2 =Vre2. The second terminal of coupling capacitor C2 discharges through threshold compensation transistor T4, driving transistor T1, and second light-emitting control transistor T7 to the second power line VSS until the voltage at the second terminal of coupling capacitor C2 (the control terminal N1 of driving transistor T1) reaches Vss + Vth, at which point driving transistor T1 is turned off. Here, Vth is the threshold voltage of driving transistor T1.

[0268] Therefore, at the end of the threshold compensation phase t3, the voltage V of the control electrode (gate) N1 of the driving transistor T1 is... N1 =Vss + Vth. For example, if the first terminal of the storage capacitor C1 is connected to the first power supply line VDD, the second reset transistor T2 is connected to the second reset signal line Vref2, and the first reset transistor T5 is connected to the first reset signal line Vref2, then the charge stored in the storage capacitor C1 is Q1 = C1 * (Vdd - Vre2), and the charge stored in the coupling capacitor C2 is Q2 = C2 * (Vre2 - Vss - Vth), where C1 is the capacitance value of the storage capacitor C1, and C2 is the capacitance value of the coupling capacitor C2.

[0269] During the data writing phase t4, the second scan signal Scan2 on the second scan line S2 is at a high level, the second light emission control signal Em2 on the second light emission control line EM2 is at a high level, the data writing transistor T3 and the second light emission control transistor T7 are turned on, the source voltage of the driving transistor T1 is maintained at the second power supply voltage Vss, the data writing transistor T3 transmits the data voltage Vdata on the data line Data to the first terminal N2 of the coupling capacitor C2, and the voltage of the first terminal N2 of the coupling capacitor C2 is the data voltage Vdata.

[0270] The charge stored in storage capacitor C1 is Q1' = C1*(Vdd - Vdata), and the charge stored in coupling capacitor C2 is Q2' = C2*(Vdata - V N1 Since the total charge remains constant, Q1 + Q2 = Q1' + Q2', from which we can obtain

[0271] During the light-emitting stage t5, the first light-emitting control signal Em1 on the first light-emitting control line EM1 and the second light-emitting control signal Em2 on the second light-emitting control line EM2 are at high levels. The first light-emitting control transistor T6 and the second light-emitting control transistor T7 are turned on. The first power line VDD, the light-emitting diode D1, the first light-emitting control transistor T6, the driving transistor T1, the second light-emitting control transistor T7, and the second power line VSS form a current loop. The driving transistor T1 generates a driving current, driving the light-emitting diode D1 to emit light. therefore, Where μ is the electron mobility of driving transistor T1, Cox is the channel capacitance per unit area of ​​driving transistor T1, W is the channel width of driving transistor T1, and L is the channel length of driving transistor T1.

[0272] Therefore, the driving current generated by the driving transistor T1 is independent of the threshold voltage of the driving transistor T1, as well as the first power supply voltage and the second power supply voltage. This avoids the influence of threshold voltage fluctuations and voltage drops of the power supply voltages (first power supply voltage and second power supply voltage) on the driving current, which is beneficial to improving the display effect of the display panel.

[0273] When the first terminal of storage capacitor C1 is connected to the first power supply line VDD, the second reset transistor T2 is connected to the second power supply line VSS, and the first reset transistor T5 is connected to the first power supply line VDD, the driving current generated by the driving transistor T1... The driving current generated by the driving transistor T1 is independent of the threshold voltage of the driving transistor T1, as well as the first power supply voltage and the second power supply voltage. This avoids the influence of threshold voltage fluctuations and voltage drops of the first power supply voltage on the driving current, which is beneficial to improving the display effect of the display panel.

[0274] For example, Figure 17 This is another driving timing diagram of a pixel circuit provided in an embodiment of the present invention, such as... Figure 17 As shown, in a frame, in two adjacent rows of pixel circuits, the first row of pixel circuits corresponds to the first second scan signal Scan2_1, and the second row of pixel circuits corresponds to the second second scan signal Scan2_2. This allows one second scan signal to drive one row of pixel circuits. One first scan signal Scan1, one third scan signal Scan3, one first light emission control signal Em1, and one second light emission control signal Em2 can each drive two pixel circuits, which can reduce the number of gate driving circuits and facilitate the implementation of narrow bezels.

[0275] Figure 18 This is a schematic diagram showing the correspondence between data voltage and grayscale in a pixel circuit according to an embodiment of the present invention. Optionally, refer to... Figure 18 The horizontal axis represents data voltage, and the vertical axis represents grayscale. The luminance of the light-emitting diode D1 in the pixel circuit provided in this embodiment is converted into grayscale. Figure 13 As can be seen, the data voltage input to the pixel circuit has a linear relationship with the luminance of the light-emitting diode D1, which means that grayscale expansion can be performed well. In other words, the pixel circuit provided in this embodiment can effectively control the luminance of the light-emitting diode D1.

[0276] Figure 19 This is a schematic diagram illustrating the brightness fluctuation of the light-emitting module corresponding to the pixel circuit in related technologies. Figure 20 This is a schematic diagram of the brightness fluctuation of the light-emitting module corresponding to the pixel circuit provided in the embodiment of the present invention, as shown below. Figure 19 and Figure 20 As shown, the horizontal axis represents the threshold voltage of the driving transistor, and the vertical axis represents the percentage of brightness fluctuation. Curve ① is the brightness fluctuation curve of the LED corresponding to grayscale G64 in the pixel circuit of the related technology; curve ② is the brightness fluctuation curve of the LED corresponding to grayscale G255 in the pixel circuit of the related technology; curve ③ is the brightness fluctuation curve of the LED corresponding to grayscale G64 in the pixel circuit of this embodiment; and curve ④ is the brightness fluctuation curve of the LED corresponding to grayscale G255 in the pixel circuit of this embodiment. Figure 14 and Figure 15As shown, the pixel circuit in the related technology can be a 2T1C pixel circuit. With the change of the threshold voltage of the driving transistor, the brightness of the light-emitting diode corresponding to the pixel circuit in the related technology fluctuates greatly, while the brightness fluctuation of the light-emitting diode corresponding to the pixel circuit in this embodiment is very small.

[0277] Figure 21 This is a schematic diagram illustrating the effect of different data writing times for the pixel circuit on the brightness of the light-emitting module, as provided in this embodiment of the invention. Figure 21 As shown, the horizontal axis represents data writing time, and the vertical axis represents the percentage of brightness difference. The percentage of brightness difference is the ratio of the luminance of the LED corresponding to each data writing time at the same grayscale to the luminance of the LED corresponding to a data writing time of 0.5 microseconds. Curve ⑤ shows the relationship between different data writing times and the percentage of brightness difference of the LED corresponding to grayscale G64, and curve ⑥ shows the relationship between different data writing times and the percentage of brightness difference of the LED corresponding to grayscale G255. Figure 21 As shown, regardless of the data writing time, the brightness difference of the light-emitting diodes corresponding to the pixel circuit in this embodiment is small, that is, the change in data writing time has little impact on the pixel circuit in this embodiment.

[0278] Figure 22 This is a schematic diagram illustrating the influence of different data write times corresponding to the pixel circuit provided in this embodiment of the invention on the voltage change at the control terminal of the driving module, as shown below. Figure 22 As shown, the horizontal axis represents time, and the vertical axis represents voltage value. Curve ⑦ is the second scan signal corresponding to a data write time of 0.5μs, curve ⑧ is the second scan signal corresponding to a data write time of 3µs, curve ⑨ is the voltage change curve of the control electrode (gate) N1 of the driving transistor T1 corresponding to a data write time of 0.5μs, and curve ⑩ is the voltage change curve of the control electrode (gate) N1 of the driving transistor T1 corresponding to a data write time of 3µs. Figure 17 As shown, regardless of the data writing time, the voltage of the control electrode (gate) N1 of the driving transistor T1 can quickly reach the target voltage and stabilize. That is, the change in data writing time has little impact on the pixel circuit of this embodiment.

[0279] Based on the above technical solutions, the following describes the structures that the display panel may also include, but this is not intended to limit this application.

[0280] Figure 23 This is a cross-sectional view of another display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 23The display panel also includes a first conductive block 301, and the isolation structure 200 is electrically connected to the first end of the driving module 120 through the first conductive block 301. Since the isolation structure 200 overlaps with the second end of the corresponding light-emitting module 110, and the isolation structure 200 is electrically connected to the first end of the driving module 120 through the first conductive block 301, the second end of the light-emitting module 110 is electrically connected to the first end of the driving module 120 through the isolation structure 200 and the first conductive block 301.

[0281] Optionally, refer to Figure 23 The isolation structure 200 encloses and forms a plurality of isolation openings 210, at least a portion of the light-emitting module 110 is located in the isolation openings 210; the isolation structure 200 includes a first part 211 and a second part 212, the first part 211, the light-emitting module 110 and the second part 212 are arranged along a first direction X; the first direction X intersects the thickness direction Z of the display panel;

[0282] The second part 212 is connected to the first conductive block 301; the second part 212 is located on the surface of the first conductive block 301.

[0283] Specifically, the isolation structure 200 can be a single-layer structure or a multi-layer structure, without limitation. The isolation structure 200 can be T-shaped, trapezoidal, or inverted trapezoidal, without limitation. The isolation structure 200 encloses and forms multiple isolation openings 210, allowing the isolation structure 200 to form a mesh structure, with the isolation openings 210 being the mesh of the mesh structure. At least a portion of the light-emitting module 110 is located in the isolation openings 210, facilitating the light-emitting module 110 to emit light. By connecting the second part 212 of the isolation structure 200 to the first conductive block 301, the second end 112 of the light-emitting module 110 can be connected to the first end of the driving module 120 through the second part 212 and the first conductive block 301.

[0284] Optionally, refer to Figure 23 The display panel includes a substrate 302; the light-emitting module 110 includes a first electrode A1; the first electrode A1 is located on one side of the substrate 302;

[0285] The display panel also includes:

[0286] A pixel definition layer 303 is located on one side of a substrate 302. The pixel definition layer 303 includes a pixel opening 3031 and a pixel definition structure 3032. The pixel opening 3031 exposes at least a portion of the first electrode A1. A second portion 212 penetrates the pixel definition layer 303. The first portion 211 is located on the side of the pixel definition structure 3032 away from the substrate 302.

[0287] For example, the first electrode A1 is the first end of the light-emitting module 110, which is the anode of the light-emitting diode D1 of the light-emitting module 110. The pixel opening 3031 can define the size of the light-emitting module 110. The substrate 302 has the functions of support, protection and buffer. The substrate 302 can be a rigid substrate or a flexible substrate. The substrate 302 can include inorganic materials, such as glass, or organic materials, and is not limited here.

[0288] Specifically, the pixel definition structure 3032 has a supporting function. The first part 211 is located on the side of the pixel definition structure 3032 away from the substrate 302, and can be located on the surface of the pixel definition structure 3032 away from the substrate 302, thus achieving the effect of supporting the first part 211. The second part 212 penetrates through the pixel definition layer 303, thereby being electrically connected to the first conductive block 301 in the conductive layer between the pixel definition layer 303 and the substrate 302.

[0289] Optionally, refer to Figure 23 The light-emitting module 110 also includes a light-emitting layer A2 and a second electrode A3; the first electrode A1, the light-emitting layer A2 and the second electrode A3 are stacked; the first electrode A1 is connected to the first power line VDD and the second electrode A3 is connected to the corresponding isolation structure 200.

[0290] The second electrode A3 is the second terminal 111 of the light-emitting module 110, which is the cathode of the light-emitting diode D1 in the light-emitting module 110. The second electrode A3 is connected to the corresponding isolation structure 200, so that the isolation structure 200 can isolate two adjacent second electrodes A3, thereby allowing two adjacent second electrodes A3 to be connected to different driving modules 120. This facilitates individual control of the potential of each second electrode A3, and thus individual control of the light emission brightness and light emission timing of each light-emitting module 110. Furthermore, the connection between the second electrode A3 and the corresponding isolation structure 200 allows the second electrode A3 to be connected to the first terminal of the corresponding driving module 120, i.e., to the drain of the corresponding driving transistor T1, through the isolation structure 200 and the first conductive block 301.

[0291] Optionally, refer to Figure 23 The display panel also includes:

[0292] The active layer 304 is located on one side of the substrate 302; the driving module 120 includes a driving transistor T1, and the drain T11 of the driving transistor T1 is located in the active layer 304.

[0293] The first conductive layer M1 is located on the side of the active layer 304 away from the substrate 302; the gate T12 of the driving transistor T1 is located in the first conductive layer M1; the coupling module 150 includes a coupling capacitor C2, and the second terminal C22 of the coupling capacitor C2 is located in the first conductive layer M1.

[0294] The second conductive layer M2 is located on the side of the first conductive layer M1 away from the substrate 302; the first terminal C21 of the coupling capacitor C2 is located on the second conductive layer M2;

[0295] The third conductive layer M3 is located on the side of the second conductive layer M2 away from the substrate 302; the first conductive block 301 is located on the third conductive layer M3.

[0296] The active layer 304 further includes a channel region T13 and a source T14 for the driving transistor T1. The active layer 304 may include an oxide material to facilitate the formation of an oxide transistor T1.

[0297] Specifically, the gate T12 of the driving transistor T1 can be reused as the second electrode C22 of the coupling capacitor C2, which facilitates the connection between the second electrode C22 of the coupling capacitor C2 and the gate T12 of the driving transistor T1, reducing the space occupied and enabling a thinner and lighter display panel design. The first conductive block 301 is located in the third conductive layer M3. The first conductive block 301 is connected to the drain T11 of the driving transistor T1 through a via, so that the cathode (second electrode A3) of the light-emitting diode D1 is connected to the drain T11 of the driving transistor T1 through the isolation structure 200 and the first conductive block 301.

[0298] Optionally, refer to Figure 23 The display panel also includes:

[0299] The planarization layer 305 is located on the side of the third conductive layer M5 away from the substrate 302; the first electrode A1 is located on the side of the planarization layer 305 away from the substrate 302.

[0300] The pixel definition layer 303 is located on the side of the planarization layer 305 away from the substrate 302, and the second part 212 penetrates the pixel definition layer 303 and the planarization layer 305.

[0301] Specifically, the planarization layer 305 has a planarization effect, which facilitates the fabrication of the anode (first electrode A1) of the light-emitting diode D1, making the film layer in the subsequent light-emitting module 110 flat and optimizing the light emission effect of the light-emitting module 110. By setting the second part 212 to penetrate the pixel definition layer 303 and the planarization layer 305, the second part 212 can be connected to the first conductive block 301 located in the third conductive layer M3.

[0302] Optionally, refer to Figure 23 The display panel also includes a second conductive block 306;

[0303] The first electrode A1 is connected to the first power line VDD via the second conductive block 306. This facilitates the connection of the first electrode A1 (the anode of the light-emitting diode D1) to the first power line VDD via the second conductive block 306.

[0304] Optionally, refer to Figure 23 The first power line VDD is located on the third conductive layer M3, and the second conductive block 306 is disposed on the same layer as the first electrode A1; the second conductive block 306 is located on the surface of the third conductive layer M3. This facilitates the connection between the second conductive block 306 and the first power line VDD located on the third conductive layer M3. Furthermore, the co-layering of the second conductive block 306 and the first electrode A1 reduces the number of film layers, making it easier to achieve a thinner and lighter display panel design.

[0305] Optionally, refer to Figure 23 The second conductive block 306 and the first electrode A1 are integrally formed. This facilitates the fabrication of the second conductive block 306 and the first electrode A1 in the same layer, simplifying the fabrication process.

[0306] Optionally, refer to Figure 23 The second power line VSS is located in the third conductive layer M3. The second power line VSS is connected to the source T14 of the driving transistor T1 through a via. Alternatively, the second power line VSS is connected to the source T14 of the driving transistor T1 via the second light-emitting control transistor T7. This ensures that the voltage at the source T14 of the driving transistor T1 is a fixed voltage during the light-emitting phase.

[0307] Figure 24 This is a cross-sectional view of another display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 24 The display panel also includes a first encapsulation layer, which includes at least one first encapsulation portion 307 located on the side of the light-emitting module 110 away from the substrate 302. The first encapsulation portion 307 may include an inorganic encapsulation material. The first encapsulation portion 307 covers the second electrode A3, thereby encapsulating the second electrode A3 and isolating it from oxygen and moisture, thus protecting the light-emitting module 110.

[0308] Optionally, refer to Figure 24 The first encapsulation portions 307 corresponding to adjacent light-emitting modules 110 are spaced apart. In this way, each second electrode A3 can be covered, and the surface of the first encapsulation portion 307 near the substrate 302 can contact the second electrode A3, achieving a better encapsulation effect.

[0309] Optionally, refer to Figure 24 The display panel also includes a second encapsulation layer 308, which is located on the surface of the first encapsulation portion 307 away from the substrate 302 and covers the isolation structure 200 and the first encapsulation portion 307. The second encapsulation layer 308 may include an organic encapsulation material. The second encapsulation layer 308 can achieve the effect of protecting the isolation structure 200.

[0310] Optionally, refer to Figure 24The display panel also includes a third encapsulation layer 309, which is located on the side of the second encapsulation layer 308 away from the substrate 302. The third encapsulation layer 309 may include inorganic encapsulation material, thereby forming a stack of organic and inorganic layers with the first encapsulation portion 307, the second encapsulation layer 308, and the third encapsulation layer 309, achieving a better encapsulation effect.

[0311] Optionally, refer to Figure 24 The display panel also includes a gate insulating layer 310, which is located between the active layer 304 and the first conductive layer M1. The gate insulating layer 310 can isolate the first conductive layer M1 and the active layer 304. The gate insulating layer 310 can be an inorganic insulating layer.

[0312] Optionally, refer to Figure 24 The display panel also includes a first inorganic insulating layer 311, which is located between the first conductive layer M1 and the second conductive layer M2. The first inorganic insulating layer 311 can isolate the first conductive layer M1 and the second conductive layer M2, forming an intermediate dielectric layer for the capacitor.

[0313] Optionally, refer to Figure 24 The display panel also includes a second inorganic insulating layer 312, which is located between the second conductive layer M2 and the third conductive layer M3. The second inorganic insulating layer 312 can isolate the second conductive layer M2 and the third conductive layer M3.

[0314] Optionally, refer to Figure 24 The display panel also includes an organic insulating layer 313, which is located between the third conductive layer M3 and the planarization layer 305.

[0315] This invention also provides a display panel. Figure 25 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 25 The display panel includes: at least two pixel circuits 100, at least one isolation structure 200 and a first conductive block 301. The pixel circuit 100 includes a light-emitting module 110 and a driving module 120. The isolation structure 200 is connected to the second end 111 of the corresponding light-emitting module 110. The isolation structure 200 is used to isolate the second ends of two adjacent light-emitting modules 110.

[0316] The isolation structure 200 is electrically connected to the first end of the drive module 120 through the first conductive block 301.

[0317] refer to Figure 2 The display panel includes at least two pixel circuits 100.

[0318] The driving module 120 includes a driving transistor T1, and the first terminal of the driving module 120 can be the drain T11 of the driving transistor T1. The driving transistor T1 also includes a gate T12, a channel region T13, and a source T14.

[0319] Specifically, the isolation structure 200 can isolate the second ends 111 of two adjacent light-emitting modules 110, allowing the second ends 111 of two adjacent light-emitting modules 110 to be connected to different driving modules 120. This facilitates individual control of the potential of the second ends 111 of each light-emitting module 110, thereby allowing individual control of the light emission brightness and timing of each light-emitting module 110. Since the isolation structure 200 overlaps with the second ends of the corresponding light-emitting module 110, the isolation structure 200 is electrically connected to the first end of the driving module 120 through the first conductive block 301, so that the second end of the light-emitting module 110 is electrically connected to the first end of the driving module 120 through the isolation structure 200 and the first conductive block 301.

[0320] Based on the above technical solution, optionally, the isolation structure encloses and forms multiple isolation openings, and at least a portion of the light-emitting module is located in the isolation opening; the isolation structure includes a first part and a second part, the first part, the light-emitting module and the second part are arranged along a first direction; the first direction intersects the thickness direction of the display panel;

[0321] The second part is connected to the first conductive block; the second part is located on the surface of the first conductive block.

[0322] Optionally, the display panel includes a substrate; the light-emitting module includes a first electrode; the first electrode is located on one side of the substrate;

[0323] The display panel also includes:

[0324] A pixel definition layer is located on one side of the substrate. The pixel definition layer includes a pixel opening and a pixel definition structure. The pixel opening exposes at least a portion of a first electrode, and a second portion penetrates the pixel definition layer. The first portion is located on the side of the pixel definition structure away from the substrate.

[0325] Optionally, the light-emitting module further includes a light-emitting layer and a second electrode; the first electrode, the light-emitting layer and the second electrode are stacked; the first electrode is connected to the first power line and the second electrode is connected to the corresponding isolation structure;

[0326] Optionally, the display panel may also include a second conductive block;

[0327] The first electrode is connected to the first power line via the second conductive block;

[0328] Optionally, the second conductive block and the first electrode are integrated into one structure;

[0329] Optionally, the display panel may also include:

[0330] An active layer is located on one side of the substrate; the driving module includes a driving transistor, the drain of which is located in the active layer.

[0331] The first conductive layer is located on the side of the active layer away from the substrate; the gate of the driving transistor is located in the first conductive layer; the pixel circuit also includes a coupling module; the coupling module includes a coupling capacitor, the second terminal of which is located in the first conductive layer;

[0332] The second conductive layer is located on the side of the first conductive layer away from the substrate; the first electrode of the coupling capacitor is located on the second conductive layer;

[0333] The third conductive layer is located on the side of the second conductive layer away from the substrate; the first conductive block is located on the third conductive layer;

[0334] Optionally, the display panel may also include:

[0335] A planarization layer is located on the side of the third conductive layer away from the substrate; the first electrode is located on the side of the planarization layer away from the substrate.

[0336] The pixel definition layer is located on the side of the planarization layer away from the substrate, and the second part runs through the pixel definition layer and the planarization layer;

[0337] Optionally, the first power line is located in the third conductive layer, and the second conductive block is disposed in the same layer as the first electrode; the second conductive block is located on the surface of the third conductive layer.

[0338] Optionally, the second conductive block and the first electrode are integrated into one structure;

[0339] Optionally, the first end of the light-emitting module is connected to the first power line, and the second end of the light-emitting module is connected to the first end of the driving module; the second end of the driving module is connected to the second power line.

[0340] Optionally, the second power line is located in the third conductive layer;

[0341] Optionally, the pixel circuit further includes a threshold compensation module, which is connected between the control terminal of the driving module and the first terminal of the driving module; the threshold compensation module is used to perform threshold compensation on the driving module during the threshold compensation stage.

[0342] Optionally, the pixel circuit further includes a data writing module, which is connected between the data line and the first end of the coupling module, and the second end of the coupling module is connected to the control end of the driving module. The data writing module is used to transmit the data voltage on the data line to the first end of the coupling module during the data writing stage, and the coupling module is used to couple the data voltage to the control end of the driving module. The data writing stage and the threshold compensation stage do not overlap in time.

[0343] Optionally, the driving module includes a driving transistor; the drain of the driving transistor is connected to the second terminal of the light-emitting module, and the source of the driving transistor is connected to the second power supply line.

[0344] Optionally, the first power supply voltage provided by the first power supply line is greater than the second power supply voltage provided by the second power supply line;

[0345] Optionally, the light-emitting module includes a light-emitting diode; the anode of the light-emitting diode is connected to a first power supply line, and the cathode of the light-emitting diode is connected to the drain of a driving transistor;

[0346] Optionally, the threshold compensation stage precedes the data writing stage;

[0347] Optionally, the pixel circuit further includes a first reset module, a first light emission control module, and a second light emission control module;

[0348] The first terminal of the first reset module is connected to the first reset signal line or the first power supply line; the second terminal of the first reset module is connected to the second terminal of the light-emitting module.

[0349] The first light-emitting control module is connected between the second end of the light-emitting module and the first end of the driving module; the first reset module is used to transmit the first reset voltage provided by the first reset signal line or the first power supply voltage provided by the first power supply line to the second end of the light-emitting module during the reset phase, and then transmit it to the first end of the driving module through the first light-emitting control module, and then transmit it to the control end of the driving module through the threshold compensation module.

[0350] The second light-emitting control module is connected between the second end of the driver module and the second power line; the second light-emitting control module is used to transmit the second power supply voltage provided by the second power line to the second end of the driver module during the light-emitting stage.

[0351] Optionally, the control terminal of the first reset module is connected to the first scan line, and the control terminal of the first light emission control module is connected to the first light emission control line;

[0352] The period during which the first scan signal on the first scan line is at an effective level overlaps with the period during which the first light emission control signal on the first light emission control line is at an effective level.

[0353] Optionally, the period during which the first scan signal on the first scan line is at an effective level is the period during which the first light emission control signal on the first light emission control line is at an effective level;

[0354] Optionally, the difference between the first power supply voltage and the first reset voltage is less than the turn-on voltage of the light-emitting module;

[0355] Optionally, the second light-emitting control module is used to turn on during the threshold compensation stage so that the second end of the coupling module discharges to the second power line through the threshold compensation module, the driving module, and the second light-emitting control module.

[0356] Optionally, the first light-emitting control module and the second light-emitting control module are used to turn off during the transition phase;

[0357] Optionally, the transition phase occurs after the reset phase and before the threshold compensation phase.

[0358] Optionally, the control terminal of the second light-emitting control module is connected to the second light-emitting control line;

[0359] Optionally, the pixel circuit also includes a storage module;

[0360] The first end of the storage module is connected to the third power line, and the second end of the storage module is connected to the first end of the coupling module; the storage module is used to maintain the potential of the first end of the coupling module.

[0361] Optionally, the third power supply voltage provided by the third power supply line is the same as the first power supply voltage provided by the first power supply line, and the first power supply line is reused as the third power supply line; or, the third power supply voltage is the same as the second power supply voltage provided by the second power supply line, and the second power supply line is reused as the third power supply line.

[0362] Optionally, the storage module includes a storage capacitor, the first terminal of which is connected to a third power supply line, and the second terminal of which is connected to the first end of the coupling module.

[0363] Optionally, the pixel circuit also includes a second reset module;

[0364] The first end of the second reset module is connected to the second reset signal line or the second power supply line, and the second end of the second reset module is connected to the first end of the coupling module. The second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module before the data writing stage.

[0365] Optionally, the second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module during the reset phase, transition phase and threshold compensation phase;

[0366] Optionally, the control terminal of the data writing module is connected to the second scan line;

[0367] Optionally, the control terminal of the threshold compensation module is connected to the third scan line;

[0368] Optionally, the control terminal of the second reset module is connected to the third scan line;

[0369] Optionally, the second reset module includes a second reset transistor, the control electrode of the second reset transistor is connected to the third scan line, the first electrode of the second reset transistor is connected to the second reset signal line or the second power supply line, and the second electrode of the second reset transistor is connected to the first end of the coupling module.

[0370] The remaining structure and working principle of the display panel are the same as those of the display panel described above (e.g., Figure 23 or Figure 24 (This is the same as any of the display panels shown), so it will not be described again here.

[0371] The remaining structure and working principle of the pixel circuit are the same as those of the pixel circuit described above (e.g., Figure 5 , Figure 6 , Figure 10 , Figure 11 , Figure 12 and Figure 15 The circuits shown are the same for any of the pixels, so they will not be described again here.

[0372] This invention also provides a driving method for a display panel. The display panel includes a pixel circuit and an isolation structure; the pixel circuit includes a light-emitting module, a driving module, a threshold compensation module, a data writing module, and a coupling module; a first end of the light-emitting module is connected to a first power line, and a second end of the light-emitting module is connected to a first end of the driving module; the second end of the driving module is connected to a second power line; the isolation structure overlaps with the second end of the corresponding light-emitting module, and the isolation structure is used to isolate the second ends of two adjacent light-emitting modules; the threshold compensation module is connected between the control terminal of the driving module and the first end of the driving module; the data writing module is connected between a data line and the first end of the coupling module, and the second end of the coupling module is connected to the control terminal of the driving module. Figure 26 This is a flowchart of a display panel driving method provided in an embodiment of the present invention, see reference. Figure 26 The driving methods for the display panel include:

[0373] S410. During the threshold compensation stage, the threshold compensation module performs threshold compensation on the drive module.

[0374] Specifically, such as Figure 3As shown, during the threshold compensation stage, the threshold compensation module 130 can transmit the threshold voltage of the driving transistor in the driving module 120 to the control terminal of the driving module 120, making the voltage at the control terminal of the driving module 120 a voltage related to the threshold voltage of the driving transistor in the driving module. This makes the voltage difference between the gate and source of the driving transistor in the driving module 120 related to its threshold voltage, and the difference between the voltage difference between the gate and source of the driving transistor and the threshold voltage independent of the threshold voltage. Since the driving current of the driving transistor is related to the difference between the voltage difference between the gate and source of the driving transistor and the threshold voltage, the driving current is independent of the threshold voltage of the driving transistor, thus avoiding the influence of threshold voltage fluctuations on the driving current.

[0375] S420. During the data writing phase, the data writing module transmits the data voltage on the data line to the first end of the coupling module, and the coupling module couples the data voltage to the control end of the drive module; wherein, the data writing phase and the threshold compensation phase do not overlap in time.

[0376] Specifically, during the data writing phase, the data writing module 140 transmits the data voltage on the data line Data to the first end of the coupling module 150, enabling the coupling module 150 to couple the data voltage to the control end of the drive module 120, thus allowing the drive module 120 to generate a drive current based on the data voltage. By setting the data writing phase and the threshold compensation phase to not overlap in time, the data writing phase and the threshold compensation phase are separated. Even when the display panel has a high resolution and the data writing time is short, sufficient threshold compensation can still be performed, preventing the threshold voltage of the drive module 120 from affecting the drive current generated by the drive module 120. This ensures that the light-emitting module 110 can emit light stably, improving the display effect of the display panel and thus enhancing the performance of the display panel.

[0377] Based on the above technical solutions, Figure 27 This is a flowchart of another display panel driving method provided in an embodiment of the present invention. Optionally, refer to... Figure 27 The driving methods for the display panel include:

[0378] S510. During the reset phase, the first reset module transmits the first reset voltage provided by the first reset signal line or the first power supply voltage provided by the first power supply line to the second end of the light-emitting module, and transmits it to the first end of the driving module through the first light-emitting control module, and transmits it to the control end of the driving module through the threshold compensation module; the second reset module transmits the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module.

[0379] Specifically, such as Figure 6 , Figure 10 or Figure 12 As shown, during the reset phase, the first reset module 160, the first light-emitting control module 170, and the threshold compensation module 130 are turned on. The first reset module 160 transmits the first reset voltage on the first reset signal line Vref1 or the first power supply voltage provided by the first power supply line VDD to the second terminal of the light-emitting module 110, resetting the second terminal of the light-emitting module 110. This prevents the voltage at the second terminal of the light-emitting module 110 from being affected by the charge of the previous frame, avoiding excessive brightness when the light-emitting module 110 displays a black screen, improving the phenomenon of excessive brightness in black states, and increasing contrast. Furthermore, the first reset module 160 transmits the first reset voltage or the first power supply voltage through the first light-emitting control module 170 and the threshold compensation module 130 to the control terminal of the driver module 120, resetting the control terminal of the driver module 120 and enabling the driver module 120 to conduct, facilitating subsequent threshold compensation. During the reset phase, the second light-emitting control module 180 is not turned on, ensuring that the driver module 120 does not generate driving current, preventing the light-emitting module 110 from emitting light. In this way, the first reset module 160 can be used to reset the second terminal of the light-emitting module 110 and the control terminal of the driving module 120, which can reduce the number of transistors and reset signal lines.

[0380] Furthermore, during the reset phase, the second reset module 192 is turned on, so that the second reset module 192 transmits the second reset voltage provided by the second reset signal line Vref2 or the second power supply voltage provided by the second power supply line VSS to the first end of the coupling module 150 to reset the first end of the coupling module 150 and maintain the voltage of the first end of the coupling module 150 as the second reset voltage or the second power supply voltage.

[0381] S520. During the transition phase, the first light-emitting control module and the second light-emitting control module are turned off; the second reset module transmits the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module.

[0382] Specifically, the first light-emitting control module 170 and the second light-emitting control module 180 are turned off during the transition phase. The transition can be carried out before the first light-emitting control module 170 or the second light-emitting control module 180 is turned on, so as to avoid the first light-emitting control module 170 and the second light-emitting control module 180 being turned on at the same time during the non-light-emitting phase, thereby preventing the light-emitting module 110 from emitting light during the non-light-emitting phase.

[0383] During the transition phase, the second reset module 192 transmits the second reset voltage provided by the second reset signal line Vref2 or the second power supply voltage provided by the second power supply line VSS to the first end of the coupling module 150 to maintain the voltage at the first end of the coupling module 150.

[0384] S530. During the threshold compensation stage, the threshold compensation module performs threshold compensation on the drive module; the second reset module transmits the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module.

[0385] Specifically, during the threshold compensation phase, the second reset module 192 continues to transmit the second reset voltage or the second power supply voltage to the first terminal of the coupling module 150, maintaining the potential of the first terminal of the coupling module 150, thereby allowing the second terminal of the coupling module 150 to discharge until the voltage at the second terminal of the coupling module 150 (the control terminal of the drive module 120) reaches Vss + Vth, at which point the drive module 120 is turned off. Here, Vth is the threshold voltage of the drive transistor T1 in the drive module 120. In this way, the voltage at the control terminal of the drive module 120 is correlated with the threshold voltage of the drive transistor T1, achieving threshold compensation for the drive module 120.

[0386] S540. During the data writing phase, the data writing module transmits the data voltage on the data line to the first end of the coupling module, and the coupling module couples the data voltage to the control end of the drive module; wherein, the data writing phase and the threshold compensation phase do not overlap in time.

[0387] S550, During the light-emitting stage, the second light-emitting control module transmits the second power supply voltage provided by the second power supply line to the second terminal of the drive module.

[0388] Specifically, during the light-emitting stage, the second light-emitting control module 180 is turned on, transmitting the second power supply voltage provided by the second power line VSS to the second terminal of the driver module 120, ensuring that the voltage at the second terminal of the driver module 120 is a fixed voltage, thereby guaranteeing that the driver module 120 generates a stable drive current. Furthermore, the first power line VDD, the light-emitting module 110, the first light-emitting control module 170, the driver module 120, and the second light-emitting control module 180 can form a current loop, enabling the driver module 120 to generate a drive current, driving the light-emitting module 110 to emit light.

[0389] This invention also provides a display device. Figure 28 This is a schematic diagram of a display device provided in an embodiment of the present invention. The display device includes a display panel provided in any embodiment of the present invention. Therefore, the display device has the same beneficial effects as the display panel provided in any embodiment of the present invention, which will not be described again here. The display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, etc.

[0390] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0391] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display panel, characterized in that, include: At least two pixel circuits and at least one isolation structure, wherein the pixel circuits include a light-emitting module, a driving module, a threshold compensation module, a data writing module, and a coupling module; The first end of the light-emitting module is connected to the first power line, and the second end of the light-emitting module is connected to the first end of the driving module through the isolation structure; the second end of the driving module is connected to the second power line; the isolation structure overlaps with the second end of the corresponding light-emitting module, and the isolation structure is used to isolate the second ends of two adjacent light-emitting modules; The threshold compensation module is connected between the control terminal of the drive module and the first terminal of the drive module; the threshold compensation module is used to perform threshold compensation on the drive module during the threshold compensation stage. The data writing module is connected between the data line and the first end of the coupling module, and the second end of the coupling module is connected to the control end of the drive module. The data writing module is used to transmit the data voltage on the data line to the first end of the coupling module during the data writing phase, and the coupling module is used to couple the data voltage to the control end of the drive module. The data writing phase and the threshold compensation phase do not overlap in time.

2. The display panel according to claim 1, characterized in that, The driving module includes a driving transistor; the drain of the driving transistor is connected to the second terminal of the light-emitting module, and the source of the driving transistor is connected to the second power line. Preferably, the first power supply voltage provided by the first power supply line is greater than the second power supply voltage provided by the second power supply line; Preferably, the light-emitting module includes a light-emitting diode; the anode of the light-emitting diode is connected to the first power line, and the cathode of the light-emitting diode is connected to the drain of the driving transistor; Preferably, the threshold compensation stage occurs before the data writing stage.

3. The display panel according to claim 1, characterized in that, The pixel circuit also includes a first reset module, a first light emission control module, and a second light emission control module. The first terminal of the first reset module is connected to the first reset signal line or the first power supply line; the second terminal of the first reset module is connected to the second terminal of the light-emitting module. The first light-emitting control module is connected between the second end of the light-emitting module and the first end of the driving module; the first reset module is used to transmit the first reset voltage provided by the first reset signal line or the first power supply voltage provided by the first power supply line to the second end of the light-emitting module during the reset phase, and then transmit it to the first end of the driving module through the first light-emitting control module, and finally transmit it to the control end of the driving module through the threshold compensation module. The second light-emitting control module is connected between the second end of the driving module and the second power line; the second light-emitting control module is used to transmit the second power supply voltage provided by the second power line to the second end of the driving module during the light-emitting stage; Preferably, the control terminal of the first reset module is connected to the first scan line, and the control terminal of the first light emission control module is connected to the first light emission control line. The time period during which the first scan signal on the first scan line is at an effective level overlaps with the time period during which the first light emission control signal on the first light emission control line is at an effective level. Preferably, the time period during which the first scan signal on the first scan line is at an effective level falls within the time period during which the first light emission control signal on the first light emission control line is at an effective level; Preferably, the difference between the first power supply voltage and the first reset voltage is less than the turn-on voltage of the light-emitting module; Preferably, one first scan line connects one or two rows of pixel circuits; Preferably, the display panel further includes a plurality of cascaded first gate driving circuits, and one first gate driving circuit is connected to one or two rows of pixel circuits through the first scan line. Preferably, one of the first light-emitting control lines is connected to one or two rows of the pixel circuits; Preferably, the display panel further includes a plurality of cascaded second gate driving circuits, one of which is connected to one or two rows of pixel circuits via the first light-emitting control line.

4. The display panel according to claim 3, characterized in that, The second light-emitting control module is used to turn on during the threshold compensation stage, so that the second end of the coupling module discharges to the second power line through the threshold compensation module, the driving module and the second light-emitting control module; Preferably, the first light-emitting control module and the second light-emitting control module are used to turn off during the transition phase; Preferably, the transition phase occurs after the reset phase and before the threshold compensation phase; Preferably, the control terminal of the second light-emitting control module is connected to the second light-emitting control line; Preferably, one second light-emitting control line is connected to one or two rows of the pixel circuits; Preferably, the display panel further includes multiple cascaded third gate driving circuits, one of the third gate driving circuits being connected to one or two rows of pixel circuits via the second light emission control line.

5. The display panel according to claim 1, characterized in that, The pixel circuit also includes a storage module; The first end of the storage module is connected to a third power line, and the second end of the storage module is connected to the first end of the coupling module; the storage module is used to maintain the potential of the first end of the coupling module. Preferably, the third power supply voltage provided by the third power supply line is the same as the first power supply voltage provided by the first power supply line, and the first power supply line is reused as the third power supply line; or, the third power supply voltage is the same as the second power supply voltage provided by the second power supply line, and the second power supply line is reused as the third power supply line. Preferably, the storage module includes a storage capacitor, the first terminal of which is connected to the third power line, and the second terminal of which is connected to the first end of the coupling module.

6. The display panel according to claim 1, characterized in that, The pixel circuit also includes a second reset module; The first end of the second reset module is connected to the second reset signal line or the second power supply line, and the second end of the second reset module is connected to the first end of the coupling module; the second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module before the data writing stage; Preferably, the second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module during the reset phase, the transition phase and the threshold compensation phase. Preferably, the control terminal of the data writing module is connected to the second scan line; Preferably, the control terminal of the threshold compensation module is connected to the third scan line; Preferably, the control terminal of the second reset module is connected to the third scan line; Preferably, one second scan line is connected to one row of pixel circuits; Preferably, the display panel further includes a plurality of cascaded fourth gate driving circuits, one of the fourth gate driving circuits being connected to a row of pixel circuits via the second scan line; Preferably, one of the third scan lines connects to one or two rows of the pixel circuits; Preferably, the display panel further includes multiple cascaded fifth gate driving circuits, one of the fifth gate driving circuits being connected to one or two rows of pixel circuits via the third scan line; Preferably, the second reset module includes a second reset transistor, the control electrode of the second reset transistor is connected to the third scan line, the first electrode of the second reset transistor is connected to the second reset signal line or the second power supply line, and the second electrode of the second reset transistor is connected to the first end of the coupling module.

7. The display panel according to claim 1, characterized in that, The data writing module includes a data writing transistor; The control electrode of the data writing transistor is connected to the second scan line, the first electrode of the data writing transistor is connected to the data line, and the second electrode of the data writing transistor is connected to the first end of the coupling module. Preferably, the threshold compensation module includes a threshold compensation transistor, the control electrode of the threshold compensation transistor is connected to the third scan line, the first electrode of the threshold compensation transistor is connected to the control terminal of the driving module, and the second electrode of the threshold compensation transistor is connected to the first terminal of the driving module. Preferably, the coupling module includes a coupling capacitor, the first terminal of which is connected to the data writing module, and the second terminal of which is connected to the control terminal of the driving module.

8. The display panel according to claim 3, characterized in that, The first reset module includes a first reset transistor, the control electrode of the first reset transistor is connected to the first scan line, the first electrode of the first reset transistor is connected to the first reset signal line or the first power supply line; the second electrode of the first reset transistor is connected to the second terminal of the light-emitting module. Preferably, the first light-emitting control module includes a first light-emitting control transistor, the control electrode of the first light-emitting control transistor is connected to the first light-emitting control line, the first electrode of the first light-emitting control transistor is connected to the second terminal of the light-emitting module through the isolation structure, and the second electrode of the first light-emitting control transistor is connected to the first terminal of the driving module. Preferably, the second light-emitting control module includes a second light-emitting control transistor, the control electrode of the second light-emitting control transistor is connected to a second light-emitting control line, the first electrode of the second light-emitting control transistor is connected to the second end of the driving module, and the second electrode of the second light-emitting control transistor is connected to the second power supply line.

9. The display panel according to any one of claims 1-8, characterized in that, The transistors in the pixel circuit are all oxide transistors. Preferably, the transistors in the pixel circuit are all N-type transistors.

10. The display panel according to any one of claims 1-8, characterized in that, The display panel further includes a first conductive block, and the isolation structure is electrically connected to the first end of the driving module through the first conductive block.

11. The display panel according to claim 10, characterized in that, The isolation structure encloses and forms a plurality of isolation openings, and at least a portion of the light-emitting module is located in the isolation openings; the isolation structure includes a first part and a second part, and the first part, the light-emitting module and the second part are arranged along a first direction; The first direction intersects the thickness direction of the display panel; The second part is connected to the first conductive block; the second part is located on the surface of the first conductive block; Preferably, the display panel includes a substrate; the light-emitting module includes a first electrode; The first electrode is located on one side of the substrate; The display panel also includes: A pixel definition layer is located on one side of the substrate. The pixel definition layer includes a pixel opening and a pixel definition structure. The pixel opening exposes at least a portion of the first electrode, and the second portion extends through the pixel definition layer. The first portion is located on the side of the pixel definition structure away from the substrate; Preferably, the light-emitting module further includes a light-emitting layer and a second electrode; the first electrode, the light-emitting layer and the second electrode are stacked; the first electrode is connected to the first power line and the second electrode is connected to a corresponding isolation structure.

12. The display panel according to claim 11, characterized in that, The display panel also includes: An active layer is located on one side of the substrate; the driving module includes a driving transistor, the drain of which is located in the active layer. A first conductive layer is located on the side of the active layer away from the substrate; the gate of the driving transistor is located on the first conductive layer; the coupling module includes a coupling capacitor, the second terminal of which is located on the first conductive layer; The second conductive layer is located on the side of the first conductive layer away from the substrate; the first electrode of the coupling capacitor is located on the second conductive layer; A third conductive layer is located on the side of the second conductive layer away from the substrate; the first conductive block is located on the third conductive layer; Preferably, the display panel further includes: A planarization layer is located on the side of the third conductive layer away from the substrate; the first electrode is located on the side of the planarization layer away from the substrate. The pixel definition layer is located on the side of the planarization layer away from the substrate, and the second portion extends through the pixel definition layer and the planarization layer.

13. The display panel according to claim 12, characterized in that, The display panel also includes a second conductive block; The first electrode is connected to the first power line via the second conductive block; Preferably, the first power line is located in the third conductive layer, and the second conductive block is disposed in the same layer as the first electrode; the second conductive block is located on the surface of the third conductive layer. Preferably, the second conductive block and the first electrode are integrally formed. Preferably, the second power line is located in the third conductive layer.

14. The display panel according to claim 11, characterized in that, The display panel further includes a first encapsulation layer, the first encapsulation layer including at least one first encapsulation portion, the first encapsulation portion being located on the side of the light-emitting module away from the substrate; Preferably, the first encapsulation portions corresponding to adjacent light-emitting modules are spaced apart; Preferably, the display panel further includes a second encapsulation layer, the second encapsulation layer being located on the surface of the first encapsulation portion away from the substrate, and covering the isolation structure and the first encapsulation portion; Preferably, the display panel further includes a third encapsulation layer located on the side of the second encapsulation layer away from the substrate.

15. A display panel, characterized in that, include: The pixel circuit includes at least two pixel circuits, at least one isolation structure, and a first conductive block, wherein the pixel circuit includes a light-emitting module and a driving module; The isolation structure overlaps with the second end of the corresponding light-emitting module, and the isolation structure is used to isolate the second ends of two adjacent light-emitting modules. The isolation structure is electrically connected to the first end of the drive module through the first conductive block.

16. The display panel according to claim 15, characterized in that, The isolation structure encloses and forms a plurality of isolation openings, and at least a portion of the light-emitting module is located in the isolation openings; the isolation structure includes a first part and a second part, and the first part, the light-emitting module and the second part are arranged along a first direction; The first direction intersects the thickness direction of the display panel; The second part is connected to the first conductive block; the second part is located on the surface of the first conductive block; Preferably, the display panel includes a substrate; the light-emitting module includes a first electrode; The first electrode is located on one side of the substrate; The display panel also includes: A pixel definition layer is located on one side of the substrate. The pixel definition layer includes a pixel opening and a pixel definition structure. The pixel opening exposes at least a portion of the first electrode, and a second portion extends through the pixel definition layer. The first portion is located on the side of the pixel definition structure away from the substrate. Preferably, the light-emitting module further includes a light-emitting layer and a second electrode; the first electrode, the light-emitting layer, and the second electrode are stacked; the first electrode is connected to a first power line, and the second electrode is connected to a corresponding isolation structure; Preferably, the display panel further includes a second conductive block; The first electrode is connected to the first power line via the second conductive block; Preferably, the second conductive block and the first electrode are integrally formed. Preferably, the display panel further includes: An active layer is located on one side of the substrate; the driving module includes a driving transistor, the drain of which is located in the active layer. A first conductive layer is located on the side of the active layer away from the substrate; the gate of the driving transistor is located on the first conductive layer; the pixel circuit further includes a coupling module; the coupling module includes a coupling capacitor, the second terminal of which is located on the first conductive layer; The second conductive layer is located on the side of the first conductive layer away from the substrate; the first electrode of the coupling capacitor is located on the second conductive layer; A third conductive layer is located on the side of the second conductive layer away from the substrate; the first conductive block is located on the third conductive layer; Preferably, the display panel further includes: A planarization layer is located on the side of the third conductive layer away from the substrate; the first electrode is located on the side of the planarization layer away from the substrate. The pixel definition layer is located on the side of the planarization layer away from the substrate, and the second portion extends through the pixel definition layer and the planarization layer; Preferably, the first power line is located in the third conductive layer, and the second conductive block is disposed in the same layer as the first electrode; the second conductive block is located on the surface of the third conductive layer. Preferably, the second conductive block and the first electrode are integrally formed. Preferably, the first end of the light-emitting module is connected to the first power line, and the second end of the light-emitting module is connected to the first end of the driving module through the isolation structure; the second end of the driving module is connected to the second power line. Preferably, the second power line is located in the third conductive layer; Preferably, the pixel circuit further includes a threshold compensation module, which is connected between the control terminal of the driving module and the first terminal of the driving module; the threshold compensation module is used to perform threshold compensation on the driving module during the threshold compensation stage. Preferably, the pixel circuit further includes a data writing module, which is connected between the data line and the first end of the coupling module, and the second end of the coupling module is connected to the control terminal of the driving module; the data writing module is used to transmit the data voltage on the data line to the first end of the coupling module during the data writing phase, and the coupling module is used to couple the data voltage to the control terminal of the driving module; the data writing phase and the threshold compensation phase do not overlap in time; Preferably, the driving module includes a driving transistor; the drain of the driving transistor is connected to the second terminal of the light-emitting module, and the source of the driving transistor is connected to the second power line; Preferably, the first power supply voltage provided by the first power supply line is greater than the second power supply voltage provided by the second power supply line; Preferably, the light-emitting module includes a light-emitting diode; the anode of the light-emitting diode is connected to the first power line, and the cathode of the light-emitting diode is connected to the drain of the driving transistor; Preferably, the threshold compensation stage is performed before the data writing stage; Preferably, the pixel circuit further includes a first reset module, a first light emission control module, and a second light emission control module; The first terminal of the first reset module is connected to the first reset signal line or the first power supply line; the second terminal of the first reset module is connected to the second terminal of the light-emitting module. The first light-emitting control module is connected between the second end of the light-emitting module and the first end of the driving module; the first reset module is used to transmit the first reset voltage provided by the first reset signal line or the first power supply voltage provided by the first power supply line to the second end of the light-emitting module during the reset phase, and then transmit it to the first end of the driving module through the first light-emitting control module, and finally transmit it to the control end of the driving module through the threshold compensation module. The second light-emitting control module is connected between the second end of the driving module and the second power line; the second light-emitting control module is used to transmit the second power supply voltage provided by the second power line to the second end of the driving module during the light-emitting stage; Preferably, the control terminal of the first reset module is connected to the first scan line, and the control terminal of the first light emission control module is connected to the first light emission control line. The time period during which the first scan signal on the first scan line is at an effective level overlaps with the time period during which the first light emission control signal on the first light emission control line is at an effective level. Preferably, the time period during which the first scan signal on the first scan line is at an effective level falls within the time period during which the first light emission control signal on the first light emission control line is at an effective level; Preferably, the difference between the first power supply voltage and the first reset voltage is less than the turn-on voltage of the light-emitting module; Preferably, the second light-emitting control module is used to turn on during the threshold compensation stage, so that the second end of the coupling module discharges to the second power line through the threshold compensation module, the driving module and the second light-emitting control module; Preferably, the first light-emitting control module and the second light-emitting control module are used to turn off during the transition phase; Preferably, the transition phase occurs after the reset phase and before the threshold compensation phase; Preferably, the control terminal of the second light-emitting control module is connected to the second light-emitting control line; Preferably, the pixel circuit further includes a storage module; The first end of the storage module is connected to a third power line, and the second end of the storage module is connected to the first end of the coupling module; the storage module is used to maintain the potential of the first end of the coupling module. Preferably, the third power supply voltage provided by the third power supply line is the same as the first power supply voltage provided by the first power supply line, and the first power supply line is reused as the third power supply line; or, the third power supply voltage is the same as the second power supply voltage provided by the second power supply line, and the second power supply line is reused as the third power supply line. Preferably, the storage module includes a storage capacitor, the first terminal of which is connected to the third power line, and the second terminal of which is connected to the first end of the coupling module. Preferably, the pixel circuit further includes a second reset module; The first end of the second reset module is connected to the second reset signal line or the second power supply line, and the second end of the second reset module is connected to the first end of the coupling module; the second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module before the data writing stage; Preferably, the second reset module is used to transmit the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module during the reset phase, the transition phase and the threshold compensation phase. Preferably, the control terminal of the data writing module is connected to the second scan line; Preferably, the control terminal of the threshold compensation module is connected to the third scan line; Preferably, the control terminal of the second reset module is connected to the third scan line; Preferably, the second reset module includes a second reset transistor, the control electrode of the second reset transistor is connected to the third scan line, the first electrode of the second reset transistor is connected to the second reset signal line or the second power supply line, and the second electrode of the second reset transistor is connected to the first end of the coupling module.

17. A driving method for a display panel, characterized in that, The display panel includes a pixel circuit and an isolation structure; the pixel circuit includes a light-emitting module, a driving module, a threshold compensation module, a data writing module, and a coupling module; a first end of the light-emitting module is connected to a first power line, and a second end of the light-emitting module is connected to the first end of the driving module through the isolation structure; the second end of the driving module is connected to a second power line; the isolation structure overlaps with the second end of a corresponding light-emitting module, and the isolation structure is used to isolate the second ends of two adjacent light-emitting modules; the threshold compensation module is connected between the control terminal of the driving module and the first end of the driving module; the data writing module is connected between a data line and the first end of the coupling module, and the second end of the coupling module is connected to the control terminal of the driving module; the driving method includes: During the threshold compensation phase, the threshold compensation module performs threshold compensation on the driving module; During the data writing phase, the data writing module transmits the data voltage on the data line to the first end of the coupling module, and the coupling module couples the data voltage to the control end of the drive module; wherein, the data writing phase and the threshold compensation phase do not overlap in time.

18. The driving method for a display panel according to claim 17, characterized in that, The pixel circuit further includes a first reset module, a first light emission control module, and a second light emission control module; a first end of the first reset module is connected to a first reset signal line or a first power supply line; a second end of the first reset module is connected to a second end of the light emission module. The first light-emitting control module is connected between the second end of the light-emitting module and the first end of the driving module; The second light-emitting control module is connected between the second end of the driving module and the second power line; Prior to the threshold compensation, the driving method further includes: During the reset phase, the first reset module transmits the first reset voltage provided by the first reset signal line or the first power supply voltage provided by the first power supply line to the second end of the light-emitting module, and then transmits it to the first end of the driving module through the first light-emitting control module, and finally transmits it to the control end of the driving module through the threshold compensation module. The driving method further includes: During the light-emitting phase, the second light-emitting control module transmits the second power supply voltage provided by the second power line to the second terminal of the driving module; Preferably, the control terminal of the first reset module is connected to the first scan line, and the control terminal of the first light emission control module is connected to the first light emission control line. The time period during which the first scan signal on the first scan line is at an effective level overlaps with the time period during which the first light emission control signal on the first light emission control line is at an effective level. Preferably, the time period during which the first scan signal on the first scan line is at an effective level falls within the time period during which the first light emission control signal on the first light emission control line is at an effective level; Preferably, the difference between the first power supply voltage and the first reset voltage is less than the turn-on voltage of the light-emitting module.

19. The driving method for a display panel according to claim 18, characterized in that, After the reset phase and before the threshold compensation phase, the driving method further includes: During the transition phase, the first light-emitting control module and the second light-emitting control module are turned off; Preferably, the pixel circuit further includes a second reset module; a first terminal of the second reset module is connected to a second reset signal line or a second power supply line, and a second terminal of the second reset module is connected to a first terminal of the coupling module; in the reset phase, the transition phase, and the threshold compensation phase, the driving method further includes: The second reset module transmits the second reset voltage provided by the second reset signal line or the second power supply voltage provided by the second power supply line to the first end of the coupling module.

20. A display device, characterized in that, Includes the display panel as described in any one of claims 1-16.

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