Display panel, driving method of display panel and display device

Abstract

The invention discloses a display panel, a driving method of the display panel and a display device. The display panel comprises a display area and a non-display area. The display panel further comprises a plurality of sub-pixels located in the display area. Each sub-pixel comprises a pixel circuit and a light-emitting device; the pixel circuit comprises a driving module, an initialization module, a data writing module and a storage module, the initialization module is used for writing initialization voltage into the control end of the driving module and / or the anode of the light-emitting device; at least one multiplexing signal line; the input end of the initialization module of the pixel circuit of each sub-pixel and the cathode of the light-emitting device are connected with a multiplexing signal line; the multiplexing signal line is used for providing initialization voltage for the initialization module in the initialization stage and providing cathode voltage for the cathode of the light-emitting device in the light-emitting stage. And the wiring number of the display panel is reduced.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel, a method for driving a display panel, and a display device. Background Art

[0002] With the gradual development of OLED (Organic Light-Emitting Diode), the requirements for circuit settings of OLED display panels are becoming increasingly higher.

[0003] Currently, OLED display panels have problems of large number of wirings and high wiring difficulty. Summary of the invention

[0004] Embodiments of the present invention provide a display panel, a method for driving the display panel, and a display device, which reduce the number of wirings of the display panel and the difficulty of wiring.

[0005] According to one aspect of the present invention, a display panel is provided, characterized in that it comprises a display area and a non-display area at least partially surrounding the display area; the display panel further comprises:

[0006] A plurality of sub-pixels are located in the display area; the sub-pixels include a pixel circuit and a light-emitting device; the pixel circuit includes a driving module, an initialization module, a data writing module and a storage module; the data writing module is used to transmit a data voltage to the driving module; the storage module is used to store a voltage at a control end of the driving module; the driving module is used to generate a driving current according to the voltage at the control end to drive the light-emitting device to emit light; the initialization module is used to write an initialization voltage to the control end of the driving module and / or the anode of the light-emitting device;

[0007] At least one multiplexed signal line, the input end of the initialization module of the pixel circuit of each sub-pixel and the cathode of the light-emitting device are electrically connected to the multiplexed signal line; the multiplexed signal line is used to provide the initialization voltage to the initialization module in the initialization stage, and to provide the cathode voltage to the cathode of the light-emitting device in the light-emitting stage.

[0008] Optionally, the plurality of sub-pixels include a first sub-pixel, a second sub-pixel and a third sub-pixel; the at least one multiplexed signal line includes a first multiplexed signal line, a second multiplexed signal line and a third multiplexed signal line;

[0009] The input terminal of the initialization module of the pixel circuit of the first sub-pixel and the cathode of the light-emitting device are electrically connected to the first multiplexed signal line;

[0010] The input terminal of the initialization module of the pixel circuit of the second sub-pixel and the cathode of the light-emitting device are electrically connected to the second multiplexed signal line;

[0011] The input terminal of the initialization module of the pixel circuit of the third sub-pixel and the cathode of the light-emitting device are electrically connected to the third multiplexed signal line.

[0012] Optionally, the at least one multiplexed signal line includes a plurality of multiplexed signal lines, and the plurality of multiplexed signal lines respectively provide different cathode voltages to the cathode of the light-emitting device;

[0013] And / or, the plurality of multiplexed signal lines are electrically connected to different output terminals of the driver chip respectively;

[0014] Preferably, the plurality of multiplexed signal lines transmit different initialization voltages to the input end of the initialization module respectively.

[0015] Optionally, the pixel circuit of the sub-pixel also includes a light-emitting control module; the light-emitting control module, the driving module and the light-emitting device are connected between the power signal line and the multiplexed signal line, and the light-emitting control module is used to control the conduction between the light-emitting device and the power signal line, and control the conduction between the light-emitting device and the multiplexed signal line during the light-emitting stage.

[0016] Optionally, the light-emitting control module includes a first light-emitting control transistor, a second light-emitting control transistor and a third light-emitting control transistor; the first electrode of the first light-emitting control transistor is connected to the power signal line, the second electrode of the first light-emitting control transistor is connected to the first end of the driving module, and the second end of the driving module is connected to the first electrode of the second light-emitting control transistor; the second electrode of the second light-emitting control transistor is connected to the anode of the light-emitting device; the first electrode of the third light-emitting control transistor is connected to the cathode of the light-emitting device, and the second electrode of the third light-emitting control transistor is connected to the reset signal line;

[0017] A gate of the first light emission control transistor, a gate of the second light emission control transistor, and a gate of the third light emission control transistor are all connected to a light emission control signal line.

[0018] Optionally, the initialization module includes:

[0019] a first initialization module, wherein a first end of the first initialization module is electrically connected to the multiplexed signal line, a second end of the first initialization module is electrically connected to the anode of the light-emitting device, and a control end of the first initialization module is used to receive a first gate signal;

[0020] And / or, a second initialization module, a first end of the second initialization module is electrically connected to the multiplexed signal line, a second end of the second initialization module is electrically connected to the control end of the driving module, and the control end of the second initialization module is used to receive a second gate signal.

[0021] Optionally, cathodes of some of the light-emitting devices are electrically connected, and the light-emitting devices emit light of the same color;

[0022] Preferably, the cathodes of some of the light-emitting devices are connected together to form cathode strips; or, the cathodes of some of the light-emitting devices are electrically connected via connecting wires.

[0023] Preferably, the cathode strips include a plurality of first cathode strips, a plurality of second cathode strips and a plurality of third cathode strips; the sub-pixels are arranged in an array; all the first sub-pixels emit the same color, all the second sub-pixels emit the same color, and all the third sub-pixels emit the same color;

[0024] In the first sub-pixels located in the same column, the cathodes of the light-emitting devices are connected as a whole to form a first cathode strip connection, and each of the first cathode strips is electrically connected to the first multiplexed signal line in a non-display area of ​​the display panel;

[0025] In the second sub-pixels located in the same column, the cathodes of the light emitting devices are connected as a whole to form a second cathode strip connection, and each of the second cathode strips is electrically connected to the second multiplexed signal line in the non-display area of ​​the display panel;

[0026] In the third sub-pixels located in the same column, the cathodes of the light-emitting devices are connected as a whole to form the third cathode strip connection, and each of the third cathode strips is electrically connected to the third multiplexed signal line in the non-display area of ​​the display panel;

[0027] Preferably, in each sub-pixel, the first end of the initialization module is electrically connected to the cathode of the light-emitting module through a via hole, or is electrically connected to the same cathode strip as the light-emitting device.

[0028] Optionally, the display panel also includes a plurality of signal transmission lines located in the display area, each of the signal transmission lines is electrically connected to the cathode of the light-emitting device in a row or a column of sub-pixels, and each of the signal transmission lines is electrically connected to a multiplexed signal line, and the multiplexed signal line transmits a cathode voltage to the cathode of the light-emitting device through the signal transmission line.

[0029] According to another aspect of the present invention, a method for driving a display panel is provided, for driving the display panel according to any embodiment of the present invention; the method comprising:

[0030] In the initialization stage, the initialization module is turned on to control the multiplexed signal line to provide an initialization voltage to the anode of the light-emitting module and / or the control terminal of the driving module;

[0031] In the data writing stage, controlling the data writing module to transmit a data voltage to the control terminal of the driving module;

[0032] In the light-emitting stage, the initialization module is disconnected, the multiplexed signal line is controlled to provide a cathode voltage to the cathode of the light-emitting device, and the driving module is controlled to output a driving current to the light-emitting device to drive the light-emitting device to emit light.

[0033] Optionally, the pixel circuit of the sub-pixel further includes a light emitting control module; the light emitting control module, the driving module and the light emitting device are connected between a power signal line and the multiplexed signal line;

[0034] Controlling the multiplexed signal line to provide a cathode voltage to the cathode of the light emitting device, and controlling the driving module to output a driving current to the light emitting device, and driving the light emitting device to emit light comprises:

[0035] Controlling the light emitting control module to be turned on, so that the multiplexed signal line is electrically connected to the cathode of the light emitting device, so as to transmit the cathode voltage to the cathode of the light emitting device through the multiplexed signal line;

[0036] The light emitting control module is controlled to be turned on, so that the power signal line is electrically connected to the driving module and the driving module is electrically connected to the anode of the light emitting device, so as to output a driving current to the light emitting device through the driving module.

[0037] According to another aspect of the present invention, a display device is provided, comprising the display panel according to any embodiment of the present invention.

[0038] The technical solution provided by the embodiment of the present invention is to set at least one multiplexed signal line in the display panel; the input end of the initialization module of the pixel circuit of each sub-pixel and the cathode of the light-emitting device are electrically connected to a multiplexed signal line; the initialization voltage is provided to the initialization module in the initialization stage, and the cathode voltage is provided to the cathode of the light-emitting device in the light-emitting stage through the multiplexed signal line; the cathode wiring and the initialization signal line are shared, which can reduce the number of wirings in the display panel and improve the problem of complex wiring under independent control of the cathodes of different sub-pixels in the display panel.

[0039] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a structural schematic diagram of a pixel circuit provided in the prior art;

[0042] Figure 2 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0043] Figure 3 is a structural schematic diagram of a pixel circuit provided by an embodiment of the present invention;

[0044] Figure 4 is a structural schematic diagram of a multiplexed signal line provided by an embodiment of the present invention;

[0045] Figure 5 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0046] Figure 6 is a structural schematic diagram of another pixel circuit provided by an embodiment of the present invention;

[0047] Figure 7 is a structural schematic diagram of another pixel circuit provided by an embodiment of the present invention;

[0048] Figure 8 It is a schematic diagram of the structure of a cathode layer in a display panel provided in the prior art;

[0049] Fig. 9 is a structural schematic diagram of another pixel circuit provided by an embodiment of the present invention;

[0050] Fig.10 is a flow chart of a method for driving a display panel provided by an embodiment of the present invention;

[0051] Fig.11 is a flow chart of another display panel driving method provided by an embodiment of the present invention;

[0052] Fig.12 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0055] Figure 1 is a schematic diagram of a pixel circuit provided in the prior art, referring to Figure 1 , the OLED display panel includes a plurality of sub-pixels, each of which includes a pixel circuit and a light-emitting device 150; the pixel circuit is connected to a scan signal line, a data signal line, an initialization signal line, and a power signal line, respectively. The data signal line is configured to provide a data voltage Data to the pixel circuit; the scan signal line is configured to provide a scan signal (scan signal Scan1 / Scan2 / Scan3) to the pixel circuit; the initialization signal line is configured to provide an initialization voltage Vrefn to the pixel circuit; and the power signal line is configured to provide a power signal to the pixel circuit. The power signal line includes a first power signal line that transmits a first power voltage VDD to the anode of the light-emitting device 150, and a second power line that transmits a second power voltage VSS to the cathode of the light-emitting device 150. The second power signal line can also be understood as a cathode wiring, and the second power voltage can also be understood as a cathode voltage. The cathode wiring and initialization wiring of the sub-pixels in the display panel are set separately, which will increase the number of wirings and wiring difficulty of the display panel.

[0056] In view of this, an embodiment of the present invention provides a display panel. Figure 2 is a schematic structural diagram of a display panel provided by an embodiment of the present invention, Figure 3 is a schematic structural diagram of a pixel circuit provided by an embodiment of the present invention, Figure 4is a schematic diagram of a structure of a multiplexed signal line provided by an embodiment of the present invention, referring to Figure 2 to Figure 4 The display panel includes a display area 11 and a non-display area 12 at least partially surrounding the display area 11; the display panel also includes:

[0057] A plurality of sub-pixels are located in the display area 11; the sub-pixels include a pixel circuit and a light-emitting device; the pixel circuit includes a driving module 110, an initialization module 130, a data writing module 120 and a storage module 140; the data writing module 120 is used to transmit a data voltage Data to the driving module 110; the storage module 140 is used to store a voltage of a control terminal G of the driving module 110; the driving module 110 is used to generate a driving current according to the voltage of the control terminal to drive the light-emitting device 150 to emit light; the initialization module 130 is used to write an initialization voltage Vrefn to the control terminal G of the driving module 110 and / or the anode of the light-emitting device 150;

[0058] At least one multiplexed signal line 100, the input end of the initialization module 130 of the pixel circuit of each sub-pixel and the cathode of the light-emitting device 150 are electrically connected to a multiplexed signal line 100; the multiplexed signal line 100 is used to provide an initialization voltage Vrefn to the initialization module 130 in the initialization phase, and to provide a cathode voltage VSS to the cathode of the light-emitting device 150 in the light-emitting phase.

[0059] Specifically, the display panel includes a display area 11 and a non-display area 12. The non-display area 12 is located on at least one side of the display area 11. The non-display area 12 includes Figure 2 The scanning drive circuit 10 and the driving chip 20 shown. In other embodiments, the driving chip 20 may not be arranged on the display panel. The display area 11 includes an array substrate and a light-emitting structure layer arranged on the array substrate. The array substrate refers to a film layer structure that can provide a driving signal for the display panel and play a role of buffering, protection or support, and includes a substrate and a driving circuit layer arranged on the substrate. The driving circuit layer includes a plurality of circuit units, a plurality of data signal lines (d1 to dn), a plurality of scanning signal lines (s1 to sm) and a plurality of power signal lines. The driving chip 20 is electrically connected to the plurality of data signal lines (d1 to dn) respectively, and the scanning drive circuit 10 is electrically connected to the plurality of scanning signal lines (s1 to sm) respectively.

[0060] The light emitting structure layer includes a plurality of light emitting devices 150, the circuit unit and the light emitting device 150 electrically connected to the circuit unit constitute a sub-pixel, and the display area 11 includes a plurality of sub-pixels Pxij, where i and j can be natural numbers. The circuit unit includes at least a pixel circuit, Figure 3, the pixel circuit is electrically connected to the scan signal line, the data signal line and the power signal line respectively. The data signal line is configured to provide a data voltage Data to the pixel circuit, and the scan signal line includes a second scan signal line, and the second scan signal line is configured to provide a second scan signal Scan2 to the pixel circuit. The second scan signal Scan2 is used to control the conduction state of the data writing module 120. When the second scan signal Scan2 controls the data writing module 120 to be turned on, the data writing module 120 is used to transmit the data voltage Data on the data signal line to the driving module 110. The storage module 140 is electrically connected to the control terminal G of the driving module 110, and the storage module 140 is used to store the voltage of the control terminal G of the driving module 110. The driving module 110 is electrically connected to the light-emitting device 150, and the driving module 110 is used to generate a driving current according to the voltage of the control terminal G to drive the light-emitting device 150 to emit light.

[0061] The output end of the initialization module 130 may be electrically connected to the control end G of the driving module 110. Before the data writing module 120 writes the data voltage Data on the data signal line to the control end G of the driving module 110 (data writing phase), the initialization module 130 is used to write the initialization voltage Vrefn to the control end G of the driving module 110 to ensure that the voltage related to the data voltage Data can be transmitted to the control end G of the driving module 110. The output end of the initialization module 130 may be electrically connected to the anode of the light emitting device 150. Before the driving module 110 generates a driving current for driving the light emitting device 150 to emit light (light emitting phase), the initialization module 130 may also be used to write the initialization voltage Vrefn to the anode of the light emitting device 150 to initialize the anode potential of the light emitting device 150.

[0062] The initialization module 130 writes the initialization voltage Vrefn to the anode of the light-emitting device 150, which may occur at the same stage as the initialization module 130 writes the initialization voltage Vrefn to the control terminal G of the driving module 110. Alternatively, the initialization module 140 writes the initialization voltage Vrefn to the anode of the light-emitting device 150, which may occur at the same stage as the data writing module 120 transmits the data voltage Data on the data signal line to the driving module 110. Alternatively, the initialization module 140 writes the initialization voltage Vrefn to the anode of the light-emitting device 150, which may occur after the data writing module 120 transmits the data voltage Data on the data signal line to the driving module 110.

[0063] At least one multiplexing signal line 100 is provided in the display panel. Figure 43 multiplexed signal lines are exemplarily drawn in the figure, which are arranged in the non-display area 12 of the display panel. The multiplexed signal line 100 is used to provide an initialization voltage to the initialization module 140 in the initialization stage. It can be understood that the multiplexed signal line 100 is used to provide an initialization voltage Vrefn to the initialization module 130 when the initialization module writes the initialization voltage Vrefn to the control terminal G of the driving module 110; and is used to provide an initialization voltage Vrefn to the initialization module 130 when the initialization module 130 writes the initialization voltage Vrefn to the anode of the light-emitting device 150. The multiplexed signal line 100 provides the initialization voltage Vrefn to the initialization module 130 in the initialization stage, which may be the same as or different from the cathode voltage VSS provided to the cathode of the light-emitting device 150 in the light-emitting stage. The voltage signal on the multiplexed signal line 100 is controlled according to actual needs. The initialization voltage Vrefn and the cathode voltage VSS are both negative voltages. Preferably, the multiplexed signal line 100 is set to provide the initialization module 130 with an absolute value of the initialization voltage Vrefn in the initialization phase, which is smaller than the absolute value of the cathode voltage VSS provided to the cathode of the light-emitting device 150 in the light-emitting phase. Setting the cathode voltage VSS to a negative voltage can prevent the light-emitting device from emitting light in the non-light-emitting phase.

[0064] The input end of the initialization module 130 of the pixel circuit of each sub-pixel and the cathode of the light-emitting device 150 are electrically connected to a multiplexed signal line 100; the initialization voltage Vrefn is provided to the initialization module 130 in the initialization stage, and the cathode voltage VSS is provided to the cathode of the light-emitting device 150 in the light-emitting stage through the multiplexed signal line 100; the cathode wiring and the initialization signal line are shared, and there is no need to set up separate cathode wiring and separate initialization signal lines for sub-pixels of different colors in the display panel, thereby reducing the number of wirings in the display panel and improving the problem of complex wiring under independent cathode control of different seed pixels in the display panel.

[0065] The display panel provided by the embodiment of the present invention comprises a display area and a non-display area at least partially surrounding the display area; the display area comprises a plurality of sub-pixels, and the non-display area comprises at least one multiplexed signal line; the sub-pixel comprises a pixel circuit and a light-emitting device; the pixel circuit comprises a driving module, an initialization module, a data writing module and a storage module; the data writing module is used to transmit a data voltage to the driving module; the storage module is used to store the data voltage of the control end of the driving module; the driving module is used to generate a driving current according to the data voltage to drive the light-emitting device to emit light; the initialization module is used to write an initialization voltage to the control end of the driving module and / or the anode of the light-emitting device; the input end of the initialization module of the pixel circuit of each sub-pixel and the cathode of the light-emitting device are electrically connected to a multiplexed signal line; the multiplexed signal line is used to provide an initialization voltage to the initialization module in the initialization stage, and to provide a cathode voltage to the cathode of the light-emitting device in the light-emitting stage. The number of wirings and the wiring difficulty of the display panel are reduced.

[0066] In one embodiment of the present invention, Figure 5 is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention, Figure 6 is a schematic diagram of another pixel circuit provided by an embodiment of the present invention, referring to Figure 5 and Figure 6 Optionally, the non-display area 12 also includes a light-emitting control driving circuit 30. The driving circuit layer includes a plurality of light-emitting control signal lines (e1 to eo), and the light-emitting control driving circuit 30 is electrically connected to the plurality of light-emitting control signal lines (e1 to eo), respectively. The pixel circuit includes a light-emitting control module; the light-emitting control module, the driving module 110, and the light-emitting device 150 are electrically connected between the power signal line and the multiplexing signal line 100. The light-emitting control signal EM on the light-emitting control signal line is used to control the conduction state of the light-emitting control module, so that the driving module 110 can transmit the driving current to the light-emitting device 150 to drive the light-emitting device 150 to emit light. The pixel circuit also includes a threshold compensation module 160, which is electrically connected between the second end of the driving module 110 and the control end G. The control end of the threshold compensation module 160 and the control end of the data writing module 120 input the same scanning signal.

[0067] The light control module may include a first light control module 171 and a second light control module 172. The first end of the first light control module 171 is electrically connected to the power signal line for receiving the power supply voltage VDD. The second end of the first light control module 171 is electrically connected to the first end of the driving module 110, and the second end of the driving module 110 is electrically connected to the first end of the second light control module 172; the second end of the second light control module 172 is electrically connected to the anode of the light emitting device 150; the light control signal line is electrically connected to the control end of the first light control module 171 and the control end of the second light control module 172. When the first light control module 171 and the second light control module 172 are both turned on, the power signal line is turned on to the anode of the light emitting device 150.

[0068] Figure 7 is a schematic diagram of another pixel circuit provided by an embodiment of the present invention, referring to Figure 7 The driving module includes a driving transistor T1, the data writing module includes a data writing transistor T2, and the storage module includes a storage capacitor C1. The light emitting control module includes a first light emitting control transistor T5 and a second light emitting control transistor T6; the threshold compensation module includes a threshold compensation transistor, which is a dual-gate transistor, including a first threshold compensation transistor T3-1 and a second threshold compensation transistor T3-2.

[0069] In one embodiment of the present invention, please continue to refer to Figure 3 and Figure 6 Optionally, the initialization module includes: a first initialization module 131, a first end of the first initialization module 131 is electrically connected to the multiplexing signal line 100, a second end of the first initialization module 131 is electrically connected to the anode of the light-emitting device 150, and a control end of the first initialization module 131 is used to receive a first gate signal; and / or, a second initialization module 132, a first end of the second initialization module 132 is electrically connected to the multiplexing signal line 100, a second end of the second initialization module 132 is electrically connected to the control end G of the driving module 110, and the control end of the second initialization module 132 is used to receive a second gate signal.

[0070] Specifically, the first initialization module 131 is used to write the initialization voltage Vrefn to the anode of the light emitting device 150. The second initialization module 132 is used to write the initialization voltage Vrefn to the control terminal of the driving module 110. Figure 7, the first initialization module 131 may include a first initialization transistor T7, a first electrode of the first initialization transistor T7 is electrically connected to the multiplexing signal line 100, a second electrode of the first initialization transistor T7 is electrically connected to the anode of the light emitting device 150, and a gate of the first initialization transistor T7 is used to receive a first gate signal. Exemplarily, when the anode of the light emitting device 150 is reset, the light emitting control signal EM is at a high level, the first light emitting control transistor T5, the second light emitting control transistor T6 and the third light emitting control transistor T8 are turned off; the first gate signal (the third scanning signal Scan3) is at a low level, the first initialization transistor T7 is turned on, and the multiplexing signal line 100 inputs the initialization voltage Vrefn to reset the anode of the light emitting device 150; when the light emitting device 150 emits light, the light emitting control signal EM is at a low level, the first gate signal (the third scanning signal Scan3) is at a high level, the first initialization transistor T7 is turned off, the first light emitting control transistor T5, the second light emitting control transistor T6 and the third light emitting control transistor T8 are turned on, the multiplexing signal line 100 inputs VSS, and the cathode voltage VSS is provided to the cathode of the light emitting device 150.

[0071] The second initialization module 132 may include a second initialization transistor, which is a dual-gate transistor, including a first sub-transistor T4-2 and a second sub-transistor T4-1, wherein a first electrode of the first sub-transistor T4-2 is electrically connected to the multiplexing signal line 100, a second electrode of the first sub-transistor T4-2 is electrically connected to a first electrode of the second sub-transistor T4-1, and a second electrode of the second sub-transistor T4-1 is electrically connected to a control terminal G of the driving module 110. The gate of the first sub-transistor T4-2 and the gate of the second sub-transistor T4-1 receive the same second gate signal (first scanning signal Scan1). When the control terminal G of the driving transistor T1 is initialized, the light-emitting control signal EM is at a high level, the first light-emitting control transistor T5, the second light-emitting control transistor T6 and the third light-emitting control transistor T8 are turned off, the first scanning signal Scan1 controls the first sub-transistor T4-2 and the second sub-transistor T4-1 to be turned on, and the multiplexing signal line 100 inputs the initialization voltage Vrefn to initialize the control terminal G of the driving transistor T1.

[0072] The control end of the first initialization module 131 and the control end of the second initialization module 132 can be as follows: Figure 3 The control end of the first initialization module 131 and the control end of the second initialization module 132 can also be connected as shown in FIG. Figure 6 As shown, different scanning signal lines are electrically connected, so that the first initialization module 131 and the second initialization module 132 can be turned on at different times, that is, the first gate signal and the second gate signal are different.

[0073] In one embodiment of the present invention, please continue to refer to Figure 2 to Figure 4 , Optionally, the plurality of sub-pixels include a first sub-pixel, a second sub-pixel and a third sub-pixel; the plurality of multiplexed signal lines 100 include a first multiplexed signal line a, a second multiplexed signal line b and a third multiplexed signal line c;

[0074] The input end of the initialization module 130 of the pixel circuit of the first sub-pixel and the cathode of the light-emitting device 150 are electrically connected to the first multiplexing signal line a;

[0075] The input terminal of the initialization module 130 of the pixel circuit of the second sub-pixel and the cathode of the light-emitting device 150 are electrically connected to the second multiplexing signal line b;

[0076] The input terminal of the initialization module 130 of the pixel circuit of the third sub-pixel and the cathode of the light emitting device 150 are electrically connected to the third multiplexing signal line c.

[0077] Specifically, the display panel includes different types of sub-pixels, and different types of sub-pixels can be understood as sub-pixels with different luminous colors. A plurality of multiplexed signal lines 100 are provided in the non-display area 12, and the input end of the initialization module 130 of the pixel circuit of each sub-pixel and the cathode of the light-emitting device 150 are electrically connected to a multiplexed signal line 100; the multiplexed signal line 100 is used to provide an initialization voltage Vrefn to the initialization module 130 in the initialization stage, and to provide a cathode voltage VSS to the cathode of the light-emitting device 150 in the light-emitting stage.

[0078] The first sub-pixel, the second sub-pixel and the third sub-pixel have different luminous colors. For example, the first sub-pixel is used to emit red light, the second sub-pixel is used to emit green light, and the third sub-pixel is used to emit blue light. Correspondingly, the multiple multiplexed signal lines include a first multiplexed signal line a, a second multiplexed signal line b and a third multiplexed signal line c. The input end of the initialization module 130 of the pixel circuit of the first sub-pixel and the cathode of the light-emitting device 150 are electrically connected to the first multiplexed signal line a, and the initialization voltage Vrefn is provided to the initialization module 130 of the first sub-pixel in the initialization stage through the first multiplexed signal line a, and the cathode voltage VSS is provided to the cathode of the light-emitting device 150 in the light-emitting stage. The input end of the initialization module 130 of the pixel circuit of the second sub-pixel and the cathode of the light-emitting device 150 are electrically connected to the second multiplexed signal line b, and the initialization voltage Vrefn is provided to the initialization module 130 of the second sub-pixel in the initialization stage through the second multiplexed signal line b, and the cathode voltage VSS is provided to the cathode of the light-emitting device 150 in the light-emitting stage. The input end of the initialization module 130 of the pixel circuit of the third sub-pixel and the cathode of the light-emitting device 150 are electrically connected to the third multiplexed signal line c, and the initialization voltage Vrefn is provided to the initialization module 130 of the third sub-pixel in the initialization stage, and the cathode voltage VSS is provided to the cathode of the light-emitting device 150 in the light-emitting stage through the third multiplexed signal line c. By setting the first multiplexed signal line a, the second multiplexed signal line b and the third multiplexed signal line c, the cathode voltages VSS of the first sub-pixel, the second sub-pixel and the third sub-pixel can be independently controlled, and the initialization voltages Vrefn of the first sub-pixel, the second sub-pixel and the third sub-pixel can be independently controlled.

[0079] Among them, the non-display area 12 may be provided with a first multiplexed signal line a, a second multiplexed signal line b, and a third multiplexed signal line c. All first sub-pixels are electrically connected to the same first multiplexed signal line a, all second sub-pixels are electrically connected to the same second multiplexed signal line b, and all third sub-pixels are electrically connected to the same third multiplexed signal line c. Thus, the number of wirings in the non-display area 12 of the display panel can be further reduced, which is conducive to the development of a narrow frame of the display panel.

[0080] Alternatively, the non-display area 12 may be provided with at least two first multiplexed signal lines a, at least two second multiplexed signal lines b, and at least two third multiplexed signal lines c. Each first multiplexed signal line a is electrically connected to a portion of the first sub-pixel, so that the first sub-pixel in the display panel can be controlled by a partition. Each second multiplexed signal line b is electrically connected to a portion of the second sub-pixel, so that the second sub-pixel in the display panel can be controlled by a partition. Each first multiplexed signal line a is electrically connected to a portion of the first sub-pixel, so that the first sub-pixel in the display panel can be controlled by a partition.

[0081] Optionally, at least one multiplexed signal line includes a plurality of multiplexed signal lines 100, and the plurality of multiplexed signal lines 100 respectively provide different cathode voltages to the cathode of the light-emitting device.

[0082] Specifically, different cathode voltages VSS and different initialization voltages Vrefn can be provided to sub-pixels of different luminous colors as needed, thereby reducing the power consumption of the display panel and improving the power consumption problem caused by the use of the same cathode voltage on the entire display panel. In addition, by multiplexing the signal line 100 to replace the cathode wiring and the initialization signal line, the cathode wiring and the initialization signal line are shared, reducing the number of wirings in the display panel, thereby improving the problem of complex wiring under independent cathode control of different sub-pixels in the display panel.

[0083] in addition, Figure 8 is a schematic diagram of the structure of a cathode layer in a display panel provided in the prior art, referring to Figure 8 , the cathode in the OLED display panel is a common cathode, and the sub-pixels on the entire surface use the same cathode layer 101, and the cathode voltages of the sub-pixels are the same; however, the cathode voltages required by sub-pixels of different colors are not the same, so using the same cathode voltage will sacrifice some power consumption. In addition, currently the sub-pixels on the entire surface use the same initialization voltage; however, the initialization voltages required by sub-pixels of different colors are also different, so using the same initialization voltage will also sacrifice some power consumption.

[0084] In the embodiment of the present invention, the input end of the initialization module 130 of the pixel circuit of each seed pixel and the cathode of the light-emitting device 150 are electrically connected to a multiplexed signal line 100; different seed pixels are electrically connected to different multiplexed signal lines 100. The multiplexed signal line 100 provides the initialization voltage Vrefn to the initialization module 130 in the initialization stage, and provides the cathode voltage VSS to the cathode of the light-emitting device 150 in the light-emitting stage; so that the initialization voltage Vrefn of the sub-pixels of different luminous colors can be independently controlled, and the cathode voltage VSS of the sub-pixels of different luminous colors can be independently controlled. Therefore, different cathode voltages VSS and different initialization voltages Vrefn can be provided to the sub-pixels of different luminous colors as needed, which reduces the power consumption of the display panel and improves the power consumption problem caused by using the same cathode voltage for the entire display panel. Furthermore, by multiplexing the signal line 100 to replace the cathode wiring and the initialization signal line, the cathode wiring and the initialization signal line are shared, and there is no need to separately set cathode wiring and initialization signal lines for sub-pixels of different colors in the display panel, thereby solving the power consumption problem caused by different seed pixels using the same cathode voltage VSS and the same initialization voltage Vrefn; and reducing the number of wirings in the display panel, thereby improving the problem of complex wiring under independent cathode control of different seed pixels in the display panel.

[0085] In one embodiment of the present invention, reference Figure 4 , Optionally, the multiple multiplexed signal lines are electrically connected to different output terminals of the driver chip, respectively. It can be understood that the initialization voltage Vrefn and cathode voltage VSS on the first multiplexed signal line a, the second multiplexed signal line b and the third multiplexed signal line c are provided by the driver chip 20. The driver chip 20 can provide the initialization voltage Vrefn required by the first sub-pixel to the first multiplexed signal line a during the initialization stage of the first sub-pixel, and provide the cathode voltage VSS required by the first sub-pixel to the first multiplexed signal line a during the light-emitting stage of the first sub-pixel. And, the driver chip 20 can provide the initialization voltage Vrefn required by the second sub-pixel to the second multiplexed signal line b during the initialization stage of the second sub-pixel, and provide the cathode voltage VSS required by the second sub-pixel to the second multiplexed signal line b during the light-emitting stage of the second sub-pixel. And, the driver chip 20 can provide the initialization voltage Vrefn required by the third sub-pixel to the third multiplexed signal line c during the initialization stage of the third sub-pixel, and provide the cathode voltage VSS required by the third sub-pixel to the third multiplexed signal line c during the light-emitting stage of the third sub-pixel.

[0086] In one embodiment of the present invention, optionally, the light-emitting control module is used to control the conduction between the light-emitting device 150 and the power signal line, and to control the conduction between the light-emitting device 150 and the multiplexed signal line during the light-emitting stage. It can be understood that the light-emitting control module can control the conduction state between the light-emitting device 150 and the multiplexed signal line 100 on the basis of controlling the conduction state between the light-emitting device 150 and the power signal line. By controlling the conduction state between the cathode of the light-emitting device 150 and the multiplexed signal line through the light-emitting control module, when the initialization module provides the initialization voltage Vrefn to the anode of the light-emitting device 150, the cathode of the light-emitting device 150 can be controlled to be disconnected from the multiplexed signal line through the light-emitting control module, so as to prevent the light-emitting device 150 from emitting light in the non-light-emitting stage due to problems such as transistor leakage in the pixel circuit, thereby affecting the display effect of the display panel.

[0087] Fig. 9 is a schematic diagram of another pixel circuit provided by an embodiment of the present invention, referring to Fig. 9, the light-emitting control module includes a first light-emitting control transistor T5, a second light-emitting control transistor T6 and a third light-emitting control transistor T8. The first electrode of the first light-emitting control transistor T5 is electrically connected to the power signal line, the second electrode of the first light-emitting control transistor T5 is electrically connected to the first end of the driving module (driving transistor T1), and the second end of the driving module is electrically connected to the first electrode of the second light-emitting control transistor T2; the second electrode of the second light-emitting control transistor T2 is electrically connected to the anode of the light-emitting device 150. The first electrode of the third light-emitting control transistor T8 is electrically connected to the cathode of the light-emitting device 150, and the second electrode of the third light-emitting control transistor T8 is electrically connected to the reset signal line 100; the gate of the first light-emitting control transistor T5, the gate of the second light-emitting control transistor T6 and the gate of the third light-emitting control transistor T8 are all electrically connected to the light-emitting control signal line. So that the light-emitting control signal EM on the light-emitting control signal line can simultaneously control the opening and closing of the first light-emitting control transistor T5, the second light-emitting control transistor T6 and the third light-emitting control transistor T8.

[0088] In one embodiment of the present invention, optionally, the cathodes of some of the light-emitting devices 150 are electrically connected, and some of the light-emitting devices 150 emit light of the same color. It can be understood that the cathodes of some of the light-emitting devices 150 in the display panel are electrically connected, and some of the light-emitting devices 150 emit light of the same color, so that the cathodes of at least some of the light-emitting devices 150 with the same light-emitting color receive the same cathode voltage. So that a multiplexed signal line 100 can provide a cathode voltage to at least some of the light-emitting devices 150 with the same light-emitting color. Preferably, the cathodes of some of the light-emitting devices 150 are connected as a whole to form a cathode strip; or, the cathodes of some of the light-emitting devices 150 are electrically connected through a connecting line. Specifically, the cathodes of some of the light-emitting devices 150 are connected as a whole to form a cathode strip, so that the multiplexed signal line 100 is electrically connected to the cathode strip, and the cathode voltage can be provided to at least some of the light-emitting devices with the same light-emitting color through the cathode strip. Alternatively, the cathodes of the light-emitting devices are separate cathodes, and the cathodes of some of the light-emitting devices are electrically connected through a connecting line. After the multiplexed signal line 100 is electrically connected to the connection line or the cathode of one of the light-emitting devices, the cathode voltage on the multiplexed signal line 100 can be transmitted to the cathodes of at least some of the light-emitting devices 150 with the same light-emitting color through the connection line between the cathodes.

[0089] In one embodiment of the present invention, optionally, the cathode strips include a plurality of first cathode strips, a plurality of second cathode strips and a plurality of third cathode strips; the sub-pixels are arranged in an array; the light-emitting colors of all the first sub-pixels are the same, the light-emitting colors of all the second sub-pixels are the same, and the light-emitting colors of all the third sub-pixels are the same; in the first sub-pixels located in the same column, the cathodes of the light-emitting devices 150 are connected as a whole to form a first cathode strip, and each first cathode strip is electrically connected to the first multiplexed signal line a in the non-display area 12 of the display panel; in the second sub-pixels located in the same column, the cathodes of the light-emitting devices 150 are connected as a whole to form a second cathode strip, and each second cathode strip is electrically connected to the second multiplexed signal line b in the non-display area 12 of the display panel; in the third sub-pixels located in the same column, the cathodes of the light-emitting devices 150 are connected as a whole to form a third cathode strip, and each third cathode strip is electrically connected to the third multiplexed signal line c in the non-display area 12 of the display panel.

[0090] Specifically, in the first sub-pixels located in the same column, the light-emitting devices 150 share the same first cathode strip and are electrically connected, and each first cathode strip is electrically connected to the first multiplexed signal line a in the non-display area 12 of the display panel, so that the cathode voltage on the first multiplexed signal line a can be given to the cathodes of the light-emitting devices 150 of the first sub-pixels of the entire surface through the first cathode strip. In the second sub-pixels located in the same column, the light-emitting devices 150 share the same second cathode strip and are electrically connected, and each second cathode strip is electrically connected to the second multiplexed signal line b in the non-display area 12 of the display panel, so that the cathode voltage on the second multiplexed signal line b can be given to the cathodes of the light-emitting devices 150 of the second sub-pixels of the entire surface through the second cathode strip. In the third sub-pixels located in the same column, the light-emitting devices 150 share the same third cathode strip and are electrically connected, and each third cathode strip is electrically connected to the third multiplexed signal line c in the non-display area 12 of the display panel, so that the cathode voltage on the third multiplexed signal line c can be given to the cathodes of the light-emitting devices 150 of the third sub-pixels of the entire surface through the third cathode strip.

[0091] Optionally, in each sub-pixel, the input terminal of the initialization module is electrically connected to the cathode of the light-emitting device 150 through a via hole, or is electrically connected to the same cathode strip as the light-emitting device 150 .

[0092] Specifically, the display panel includes a substrate, a driving circuit layer disposed on the substrate, and a light emitting structure layer disposed on a side of the driving circuit layer away from the substrate. The light emitting structure layer includes a plurality of light emitting devices 150, each of which includes an anode disposed on the driving circuit layer, a light emitting material layer disposed on a side of the anode away from the substrate, and a cathode disposed on a side of the light emitting material layer away from the substrate. When the cathodes of some of the light emitting devices 150 are electrically connected through a connecting line, in each sub-pixel, the first end of the initialization module 130 can be electrically connected to the cathode of the light emitting device 150 through a via hole, and when the cathode of the light emitting device 150 receives the initialization voltage Vrefn transmitted by the multiplexed signal line 100, the initialization voltage Vrefn can be transmitted to the input end of the initialization module through the cathode of the light emitting device 150 and through the via hole. Alternatively, when the cathodes of some of the light emitting devices 150 are connected as a whole to form a cathode strip, in each sub-pixel, the input end of the initialization module can be electrically connected to the same cathode strip as the light emitting device 150, and the input end of the initialization module 130 can directly receive the initialization voltage Vrefn on the cathode strip.

[0093] In another embodiment of the present invention, optionally, the display panel also includes a plurality of signal transmission lines located in the display area, each signal transmission line is electrically connected to the cathode of the light-emitting device in a row or a column of sub-pixels, and each signal transmission line is electrically connected to a multiplexed signal line, and the multiplexed signal line transmits cathode voltage to the cathode of the light-emitting device through the signal transmission line.

[0094] The signal transmission line may be, for example, an initialization signal line, which is connected to a multiplexing signal line located in a non-display area, so that the initialization voltage on the multiplexing signal line can be transmitted to an initialization module in a pixel circuit during the initialization phase. The input end of the initialization module is electrically connected to the cathode of the light-emitting device 150 through a via, so that each initialization signal line is electrically connected to the cathode of the light-emitting device in a row or column of sub-pixels, and then the cathode voltage on the multiplexing signal line can be transmitted to the cathode of the light-emitting device through the initialization signal line during the light-emitting phase.

[0095] An embodiment of the present invention further provides a method for driving a display panel, which is used to drive the display panel described in any of the above embodiments. Fig.10 is a flow chart of a method for driving a display panel provided by an embodiment of the present invention, with reference to Fig.10 , combined with Figure 3 , the driving method of the display panel includes:

[0096] S110 , in the initialization stage, turning on the initialization module, and controlling the multiplexed signal line to provide an initialization voltage to the anode of the light-emitting module and / or the control terminal of the driving module.

[0097] Specifically, in the initialization stage, the initialization module 130 is turned on by the scan signal on the scan signal line, and the multiplexed signal line 100 is controlled to provide the initialization voltage Vrefn to the anode of the light-emitting device 150 and / or the control terminal G of the driving module 110. The initialization module 130 may include a first initialization module 131, a first end of the first initialization module 131 is electrically connected to the multiplexed signal line 100, a second end of the first initialization module 131 is electrically connected to the anode of the light-emitting device 150, and a control terminal of the first initialization module 131 is used to receive a first gate signal; and / or a second initialization module 132, a first end of the second initialization module 132 is electrically connected to the multiplexed signal line 100, a second end of the second initialization module 132 is electrically connected to the control terminal G of the driving module 110, and a control terminal of the second initialization module 132 is used to receive a second gate signal. The control terminal of the first initialization module 131 and the control terminal of the second initialization module 132 may be electrically connected to the same scan signal line, so that the first initialization module 131 and the second initialization module 132 can be turned on at the same time. The control end of the first initialization module 131 and the control end of the second initialization module 132 may also be electrically connected to different scanning signal lines, so that the first initialization module 131 and the second initialization module 132 can be turned on at different times. Figure 3 , the control end of the first initialization module 131 and the control end of the second initialization module 132 are both input with the first scanning signal Scan1, so that the first initialization module 131 and the second initialization module 132 are turned on at the same time.

[0098] S120 , in the data writing phase, controlling the data writing module to transmit the data voltage to the driving module.

[0099] Specifically, in the data writing stage, the initialization module is disconnected by the first scanning signal Scan1 on the first scanning signal line. The data writing module 120 is turned on by the second scanning signal Scan2 on the second scanning signal line, and the data writing module 120 can write the data voltage Data on the data signal line to the control terminal G of the driving module 110. The storage module 140 is electrically connected to the control terminal G of the driving module 110, and the storage module 140 can store the voltage of the control terminal G of the driving module 110.

[0100] S130 , in the light-emitting stage, disconnect the initialization module, control the multiplexed signal line 100 to provide a cathode voltage to the cathode of the light-emitting device 150 , and control the driving module 110 to output a driving current to the light-emitting device 150 to drive the light-emitting device 150 to emit light.

[0101] Specifically, in the light-emitting stage, the initialization module 130 is disconnected by the first scan signal Scan1 on the first scan signal line. The data writing module 120 is disconnected by the second scan signal Scan2 on the second scan signal line. The multiplexed signal line 100 is controlled to provide a cathode voltage to the cathode of the light-emitting device 150, and the driving module 110 outputs a driving current to the light-emitting device. The input end of the initialization module 130 of the pixel circuit of each sub-pixel and the cathode of the light-emitting device 150 are electrically connected to a multiplexed signal line 100; the initialization voltage Vrefn is provided to the initialization module 130 in the initialization stage, and the cathode voltage VSS is provided to the cathode of the light-emitting device 150 in the light-emitting stage through the multiplexed signal line 100; so that the cathode voltage VSS and the initialization voltage Vrefn of the sub-pixels of different light-emitting colors can be independently controlled, so that different cathode voltages VSS and different initialization voltages Vrefn can be provided to the sub-pixels of different light-emitting colors as needed, thereby reducing the power consumption of the display panel and improving the power consumption problem caused by using the same cathode voltage on the entire display panel. Furthermore, by multiplexing the signal line 100 to replace the cathode wiring and the initialization signal line, the cathode wiring and the initialization signal line are shared, and there is no need to separately set cathode wiring and initialization signal lines for sub-pixels of different colors in the display panel. In addition, by partitioning and transmitting different cathode voltages and initialization voltages, the power consumption problem caused by using the same cathode voltage and the same initialization voltage is solved, and the number of wirings in the display panel is reduced, thereby improving the problem of complex wiring under independent cathode control of different seed pixels in the display panel.

[0102] Fig.11 is a flowchart of another display panel driving method provided by an embodiment of the present invention, referring to Fig.11 , combined with Fig. 9 , the driving method of the display panel includes:

[0103] S210 , in a first initialization stage, turning on a first initialization module to control the multiplexed signal line to provide an initialization voltage to a control terminal of the driving module.

[0104] S220 , in the data writing phase, controlling the data writing module to transmit the data voltage to the driving module.

[0105] S230. In the second initialization stage, turn on the second initialization module to control the multiplexed signal line to provide an initialization voltage to the anode of the light-emitting module.

[0106] S240, in the light-emitting stage, turn on the light-emitting control module, control the multiplexed signal line to provide a cathode voltage to the cathode of the light-emitting device, and control the driving module to output a driving current to the light-emitting device to drive the light-emitting device to emit light.

[0107] Specifically, the pixel circuit of the sub-pixel further includes a light-emitting control module; the light-emitting control module, the driving module 110 and the light-emitting device 150 are electrically connected between the power signal line and the multiplexed signal line 100, and the light-emitting control module is used to control the conduction state between the light-emitting device 150 and the power signal line, and control the conduction state between the light-emitting device 150 and the multiplexed signal line 100. Controlling the multiplexed signal line 100 to provide a cathode voltage to the cathode of the light-emitting device 150, and controlling the driving module 110 to output a driving current to the light-emitting device 150, specifically includes: controlling the light-emitting control module to be turned on, so that the multiplexed signal line 100 and the cathode of the light-emitting device 150 are turned on, so as to transmit the cathode voltage VSS to the cathode of the light-emitting device through the multiplexed signal line 100; controlling the light-emitting control module to be turned on, so that the power signal line and the driving module 110 are electrically connected, and the driving module 110 is electrically connected to the anode of the light-emitting device 150, so as to output a driving current to the light-emitting device 150 through the driving module 110.

[0108] Optional, reference Fig. 9 , the light-emitting control module may include a first light-emitting control transistor T5, a second light-emitting control transistor T6 and a third light-emitting control transistor T8. The first electrode of the first light-emitting control transistor T5 is electrically connected to the power signal line, the second electrode of the first light-emitting control transistor T5 is electrically connected to the first end of the driving module (driving transistor T1), and the second end of the driving module is electrically connected to the first electrode of the second light-emitting control transistor T2; the second electrode of the second light-emitting control transistor T2 is electrically connected to the anode of the light-emitting device 150. The first electrode of the third light-emitting control transistor T8 is electrically connected to the cathode of the light-emitting device 150, and the second electrode of the third light-emitting control transistor T8 is electrically connected to the reset signal line 100; the gate of the first light-emitting control transistor T5, the gate of the second light-emitting control transistor T6 and the gate of the third light-emitting control transistor T8 are all electrically connected to the light-emitting control signal line. So that the light-emitting control signal EM on the light-emitting control signal line can simultaneously control the opening and closing of the first light-emitting control transistor T5, the second light-emitting control transistor T6 and the third light-emitting control transistor T8. The cathode of the light-emitting device 150 is disconnected from the multiplexed signal line 100 by controlling the third light-emitting control transistor T8 to prevent the light-emitting device 150 from emitting light in the non-light-emitting stage due to problems such as transistor leakage in the pixel circuit, thereby affecting the display effect of the display panel.

[0109] Fig.12 is a schematic diagram of a display device provided by an embodiment of the present invention, with reference to Fig.12 The embodiment of the present invention further provides a display device, comprising the display panel 1 described in any of the above embodiments. The same technical effects are achieved, which will not be described in detail here.

[0110] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a non-display area at least partially surrounding the display area; the display panel further comprises: A plurality of sub-pixels are located in the display area; the sub-pixels include a pixel circuit and a light-emitting device; the pixel circuit includes a driving module, an initialization module, a data writing module and a storage module; the data writing module is used to transmit a data voltage to the driving module; the storage module is used to store a voltage at a control end of the driving module; the driving module is used to generate a driving current according to the voltage at the control end to drive the light-emitting device to emit light; the initialization module is used to write an initialization voltage to the control end of the driving module and / or the anode of the light-emitting device; At least one multiplexed signal line, the input end of the initialization module of the pixel circuit of each sub-pixel and the cathode of the light-emitting device are electrically connected to the multiplexed signal line; the multiplexed signal line is used to provide the initialization voltage to the initialization module in the initialization stage, and to provide the cathode voltage to the cathode of the light-emitting device in the light-emitting stage.

2. The display panel according to claim 1, characterized in that: The plurality of sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; the at least one multiplexed signal line includes a first multiplexed signal line, a second multiplexed signal line, and a third multiplexed signal line; The input terminal of the initialization module of the pixel circuit of the first sub-pixel and the cathode of the light-emitting device are electrically connected to the first multiplexed signal line; The input terminal of the initialization module of the pixel circuit of the second sub-pixel and the cathode of the light-emitting device are electrically connected to the second multiplexed signal line; The input terminal of the initialization module of the pixel circuit of the third sub-pixel and the cathode of the light-emitting device are electrically connected to the third multiplexed signal line.

3. The display panel according to claim 1, characterized in that: The at least one multiplexed signal line comprises a plurality of multiplexed signal lines, and the plurality of multiplexed signal lines respectively provide different cathode voltages to the cathode of the light emitting device; And / or, the plurality of multiplexed signal lines are electrically connected to different output terminals of the driver chip respectively; Preferably, the plurality of multiplexed signal lines transmit different initialization voltages to the input end of the initialization module respectively.

4. The display panel according to claim 1, characterized in that: The pixel circuit of the sub-pixel further includes a light-emitting control module; the light-emitting control module, the driving module and the light-emitting device are connected between the power signal line and the multiplexed signal line, and the light-emitting control module is used to control the conduction between the light-emitting device and the power signal line, and control the conduction between the light-emitting device and the multiplexed signal line in the light-emitting stage; Preferably, the light-emitting control module includes a first light-emitting control transistor, a second light-emitting control transistor and a third light-emitting control transistor; a first electrode of the first light-emitting control transistor is connected to the power signal line, a second electrode of the first light-emitting control transistor is connected to a first end of the driving module, and a second end of the driving module is connected to a first electrode of the second light-emitting control transistor; a second electrode of the second light-emitting control transistor is connected to an anode of the light-emitting device; a first electrode of the third light-emitting control transistor is connected to a cathode of the light-emitting device, and a second electrode of the third light-emitting control transistor is connected to the multiplexing signal line; A gate of the first light emission control transistor, a gate of the second light emission control transistor, and a gate of the third light emission control transistor are all connected to a light emission control signal line.

5. The display panel according to claim 1, characterized in that: The initialization module includes: a first initialization module, wherein a first end of the first initialization module is electrically connected to the multiplexed signal line, a second end of the first initialization module is electrically connected to the anode of the light-emitting device, and a control end of the first initialization module is used to receive a first gate signal; And / or, a second initialization module, a first end of the second initialization module is electrically connected to the multiplexed signal line, a second end of the second initialization module is electrically connected to the control end of the driving module, and the control end of the second initialization module is used to receive a second gate signal.

6. The display panel according to claim 2, characterized in that: The cathodes of some of the light emitting devices are electrically connected, and the light emitting devices emit light of the same color; Preferably, the cathodes of some of the light-emitting devices are connected as a whole to form a cathode strip; or, the cathodes of some of the light-emitting devices are electrically connected via a connecting wire; Preferably, the cathode strips include a plurality of first cathode strips, a plurality of second cathode strips and a plurality of third cathode strips; The sub-pixels are arranged in an array; all the first sub-pixels emit the same light color, all the second sub-pixels emit the same light color, and all the third sub-pixels emit the same light color; In the first sub-pixels located in the same column, the cathodes of the light-emitting devices are connected as a whole to form a first cathode strip connection, and each of the first cathode strips is electrically connected to the first multiplexed signal line in a non-display area of ​​the display panel; In the second sub-pixels located in the same column, the cathodes of the light emitting devices are connected as a whole to form a second cathode strip connection, and each of the second cathode strips is electrically connected to the second multiplexed signal line in the non-display area of ​​the display panel; In the third sub-pixels located in the same column, the cathodes of the light-emitting devices are connected as a whole to form the third cathode strip connection, and each of the third cathode strips is electrically connected to the third multiplexed signal line in the non-display area of ​​the display panel; Preferably, in each sub-pixel, the first end of the initialization module is electrically connected to the cathode of the light-emitting module through a via hole, or is electrically connected to the same cathode strip as the light-emitting device.

7. The display panel according to claim 1, characterized in that: The display panel also includes a plurality of signal transmission lines located in the display area, each of the signal transmission lines being electrically connected to the cathode of a light-emitting device in a row or a column of sub-pixels, and each of the signal transmission lines being electrically connected to a multiplexed signal line, and the multiplexed signal line transmits a cathode voltage to the cathode of the light-emitting device through the signal transmission line.

8. A method for driving a display panel, characterized in that: Used to drive the display panel according to any one of claims 1 to 7; comprising: In the initialization stage, the initialization module is turned on to control the multiplexed signal line to provide an initialization voltage to the anode of the light-emitting module and / or the control terminal of the driving module; In the data writing stage, controlling the data writing module to transmit a data voltage to the driving module; In the light-emitting stage, the initialization module is disconnected, the multiplexed signal line is controlled to provide a cathode voltage to the cathode of the light-emitting device, and the driving module is controlled to output a driving current to the light-emitting device to drive the light-emitting device to emit light.

9. The method for driving a display panel according to claim 8, wherein: The pixel circuit of the sub-pixel further includes a light emitting control module; the light emitting control module, the driving module and the light emitting device are connected between a power signal line and the multiplexed signal line; Controlling the multiplexed signal line to provide a cathode voltage to the cathode of the light emitting device, and controlling the driving module to output a driving current to the light emitting device, and driving the light emitting device to emit light comprises: Controlling the light emitting control module to be turned on, so that the multiplexed signal line is electrically connected to the cathode of the light emitting device, so as to transmit the cathode voltage to the cathode of the light emitting device through the multiplexed signal line; The light emitting control module is controlled to be turned on, so that the power signal line is electrically connected to the driving module and the driving module is electrically connected to the anode of the light emitting device, so as to output a driving current to the light emitting device through the driving module.

10. A display device, characterized in that: The invention comprises the display panel according to any one of claims 1 to 7.

Images