Display panel, driving method thereof, and display device

Abstract

An embodiment of the present invention discloses a display panel, a driving method thereof, and a display device. The display panel includes a first pixel circuit, a second pixel circuit, and a first switching module. Both the first pixel circuit and the second pixel circuit include a storage module, a driving module, and a light-emitting module. The first switching module is configured to conduct during the light-emitting stage in a preset low-frequency display mode to connect the storage module in the first pixel circuit and the storage module in the second pixel circuit in parallel. Wherein, the light-emitting stages of the first pixel circuit and the second pixel circuit are the same, and the first pixel circuit and the second pixel circuit are arranged adjacent to each other and / or the light-emitting colors of the light-emitting modules in the first pixel circuit and the second pixel circuit are the same. The technical solution of the embodiment of the present invention helps to alleviate the leakage problem of the control end of the driving module, and alleviate the display brightness attenuation of the light-emitting module during the light-emitting stage in the preset low-frequency display mode, thereby reducing the flicker problem of the display panel and improving the display effect.

Description

Technical Field

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

[0002] With the continuous development of display technologies, people have higher and higher requirements for the performance of display panels. A pixel circuit is included in a display panel. The existing pixel circuit has a weak ability to hold data voltage, which may cause the display brightness to decay within one frame, thereby resulting in the flickering of the display screen and affecting the display effect. Summary of the Invention

[0003] Embodiments of the present invention provide a display panel, a driving method thereof, and a display device, so as to improve the voltage holding ability of the control end of a driving module, alleviate the display brightness decay in the light-emitting stage of a light-emitting module in a preset low-frequency display mode, reduce the flickering problem of the display panel, and thus improve the display effect.

[0004] In a first aspect, embodiments of the present invention provide a display panel, including:

[0005] A first pixel circuit and a second pixel circuit. Both the first pixel circuit and the second pixel circuit include a storage module, a driving module, and a light-emitting module. A first end of the storage module is connected to a fixed voltage, and a second end is connected to a control end of the driving module. The driving module is configured to drive the light-emitting module to emit light according to the voltage of its own control end during a light-emitting stage.

[0006] A first switch module, connected between the second end of the storage module in the first pixel circuit and the second end of the storage module in the second pixel circuit, and configured to conduct during the light-emitting stage in a preset low-frequency display mode to parallel the storage module in the first pixel circuit and the storage module in the second pixel circuit.

[0007] Wherein, the light-emitting stages of the first pixel circuit and the second pixel circuit are the same, and the first pixel circuit and the second pixel circuit are adjacent to each other and / or the light-emitting colors of the light-emitting modules in the first pixel circuit and the second pixel circuit are the same.

[0008] Optionally, the preset low-frequency display mode includes a screen-off display mode. The first pixel circuit and the second pixel circuit further include a light-emitting control module. The light-emitting control module, the driving module, and the light-emitting module are connected between a first power line and a second power line. Control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit are connected to the same light-emitting control signal and are configured to conduct or turn off in response to the light-emitting control signal.

[0009] The display panel further includes a standby screen control signal line, and the first switching module includes a first switching unit and a second switching unit; a control end of the first switching unit is connected to the standby screen control signal line, a first end of the first switching unit is connected to a control end of the light-emitting control module in the first pixel circuit and the second pixel circuit, a second end of the first switching unit is connected to a control end of the second switching unit, and the first switching unit is configured to be turned on in the standby screen display mode in response to a signal on the standby screen control signal line to write the light-emitting control signal to the control end of the second switching unit;

[0010] The second switching unit is connected between a second end of the storage module in the first pixel circuit and a second end of the storage module in the second pixel circuit, and is configured to be turned on in a light-emitting stage in the standby screen display mode in response to the light-emitting control signal to parallel the storage module in the first pixel circuit and the storage module in the second pixel circuit.

[0011] Optionally, the first switching unit includes a first transistor, and the second switching unit includes a second transistor;

[0012] A gate of the first transistor is connected to the standby screen control signal line, a first pole of the first transistor is connected to the control end of the light-emitting control module in the first pixel circuit and the second pixel circuit, and a second pole of the first transistor is connected to a gate of the second transistor;

[0013] A first pole of the second transistor is connected to the second end of the storage module in the first pixel circuit, and a second pole of the second transistor is connected to the second end of the storage module in the second pixel circuit;

[0014] Preferably, the light-emitting control module includes a third transistor, the third transistor is connected between the first power supply line and the second power supply line, a gate of the third transistor accesses the light-emitting control signal, the first pole of the first transistor is connected to the gate of the third transistor, and the second transistor and the third transistor are of the same type;

[0015] Preferably, the light-emitting control module further includes a fourth transistor, the fourth transistor is connected between the first power supply line and the second power supply line, a gate of the fourth transistor accesses the light-emitting control signal, and the third transistor and the fourth transistor are of the same type;

[0016] Preferably, the display panel includes a substrate, a light-shielding layer, an active layer, and a multi-layer metal layer that are sequentially located on the substrate. The first pixel circuit and the second pixel circuit are formed in the active layer and the multi-layer metal layer, and the off-screen control signal line is disposed on the same layer as at least one of the light-shielding layer and the multi-layer metal layer.

[0017] Optionally, the driving module includes a driving transistor, the storage module includes a storage capacitor, and the light-emitting module includes a light-emitting device;

[0018] The driving transistor and the light-emitting device are connected between a first power supply line and a second power supply line. A first electrode of the storage capacitor is connected to the fixed voltage, a second electrode of the storage capacitor is connected to the gate of the driving transistor, and the first switching module is connected between the second electrodes of the storage capacitors in the first pixel circuit and the second pixel circuit;

[0019] Preferably, the first pixel circuit and the second pixel circuit further include a data writing module for writing a data voltage to the driving module during a data writing stage. The first switching module is further configured to turn off during other stages except the light-emitting stage in the preset low-frequency display mode, so as to disconnect the storage modules in the first pixel circuit and the second pixel circuit during the data writing stage;

[0020] Preferably, the data writing module includes a fifth transistor. A gate of the fifth transistor is connected to a scanning signal, a first electrode of the fifth transistor is connected to the data voltage, and a second electrode of the fifth transistor is connected to the driving module.

[0021] Optionally, the first pixel circuits and the second pixel circuits are arranged in an array in the display panel, and one row of the first pixel circuits and one row of the second pixel circuits are arranged alternately;

[0022] The light-emitting stages of one row of the second pixel circuits and the first pixel circuits in the previous row are the same, and second ends of the storage modules of the second pixel circuits in one column and second ends of the storage modules of the previous first pixel circuits are connected through the first switching module.

[0023] Optionally, the first pixel circuits and the second pixel circuits in the same column are adjacent to each other; and / or, the light-emitting modules in the first pixel circuits and the second pixel circuits in the same column have the same light-emitting color.

[0024] Optionally, the light-emitting module at least includes a first light-emitting module, a second light-emitting module, and a third light-emitting module with different light-emitting colors. A column including the first pixel circuit and the second pixel circuit of the first light-emitting module, a column including the first pixel circuit and the second pixel circuit of the second light-emitting module, and a column including the first pixel circuit and the second pixel circuit of the third light-emitting module are alternately arranged in the display panel;

[0025] The display panel further includes a second switch module. The first end of the second switch module is connected to the second end of the storage module of one of the second pixel circuits in a row, and the second end of the second switch module is connected to the second end of the storage module of the second pixel circuit with the same light-emitting color of the next light-emitting module in the same row. The second switch module is configured to conduct during the light-emitting stage in the preset low-frequency display mode to parallel the storage modules in the corresponding second pixel circuits.

[0026] In a second aspect, an embodiment of the present invention provides a driving method for a display panel. The display panel includes: a first pixel circuit, a second pixel circuit, and a first switch module; both the first pixel circuit and the second pixel circuit include a storage module, a driving module, and a light-emitting module; the first end of the storage module is connected to a fixed voltage, and the second end is connected to the control end of the driving module; the driving module is configured to drive the light-emitting module to emit light according to the voltage at its control end during the light-emitting stage; it is connected between the second end of the storage module in the first pixel circuit and the second end of the storage module in the second pixel circuit;

[0027] The driving method for the display panel includes:

[0028] Controlling the first switch module to conduct during the light-emitting stage in the preset low-frequency display mode to parallel the storage module in the first pixel circuit and the storage module in the second pixel circuit;

[0029] Wherein, the light-emitting stages of the first pixel circuit and the second pixel circuit are the same, and the first pixel circuit and the second pixel circuit are adjacent to each other and / or the light-emitting modules in the first pixel circuit and the second pixel circuit have the same light-emitting color.

[0030] Optionally, the preset low-frequency display mode includes a standby display mode; the first pixel circuit and the second pixel circuit further include a light emission control module, the light emission control module, the driving module, and the light emission module are connected between a first power supply line and a second power supply line, and control ends of the light emission control modules in the first pixel circuit and the second pixel circuit are accessed with the same light emission control signal, and are used to conduct or turn off in response to the light emission control signal; the display panel further includes a standby control signal line, and the first switching module includes a first switching unit and a second switching unit; a control end of the first switching unit is connected to the standby control signal line, a first end of the first switching unit is connected to the control end of the light emission control module in the first pixel circuit and the second pixel circuit, and a second end of the first switching unit is connected to a control end of the second switching unit; the second switching unit is connected between a second end of the storage module in the first pixel circuit and a second end of the storage module in the second pixel circuit;

[0031] The driving method of the display panel includes:

[0032] Controlling the first switching unit to conduct in the standby display mode in response to a signal on the standby control signal line, so as to write the light emission control signal to the control end of the second switching unit;

[0033] Passing through the second switching unit to conduct in a light emission stage in the standby display mode in response to the light emission control signal, so as to parallel the storage module in the first pixel circuit and the storage module in the second pixel circuit.

[0034] In a third aspect, an embodiment of the present invention provides a display device, including the display panel described in the first aspect.

[0035] The display panel, its driving method, and the display device provided by the embodiments of the present invention, during the light-emitting stage in the preset low-frequency display mode, by controlling the first switch module to conduct, the storage modules in the first pixel circuit and the second pixel circuit can be connected in parallel, so that the control terminals of the driving modules in the first pixel circuit and the second pixel circuit are both connected to the two storage modules connected in parallel, and the overall voltage storage capacity of the two storage modules connected in parallel increases, thereby improving the voltage holding capacity of the control terminals of the driving modules, helping to alleviate the leakage problem of the control terminals of the driving modules, and alleviating the display brightness attenuation during the light-emitting stage in the preset low-frequency display mode, thereby reducing the flicker problem of the display panel and improving the display effect. Additionally, during the data writing stage and the normal display mode in the preset low-frequency display mode, by controlling the first switch module to turn off, the connection between the storage modules in the first pixel circuit and the second pixel circuit can also be disconnected, so that the storage modules in the first pixel circuit and the second pixel circuit are independent of each other, thereby enabling the data voltage writing processes of the first pixel circuit and the second pixel circuit to not affect each other, which helps to ensure the charging rate of the storage modules in the first pixel circuit and the second pixel circuit.

[0036] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understandable through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 is a schematic structural diagram of a first pixel circuit, a second pixel circuit, and a first switch module provided by the embodiments of the present invention;

[0039] Figure 2 is a schematic structural diagram of another first pixel circuit, a second pixel circuit, and a first switch module provided by the embodiments of the present invention;

[0040] Figure 3 is a driving timing diagram provided by the embodiments of the present invention;

[0041] Figure 4 is a schematic structural diagram of a display panel provided by the embodiments of the present invention;

[0042] Figure 5 is a schematic structural diagram of another display panel provided by the embodiments of the present invention;

[0043] Figure 6 It is a schematic flow chart of a driving method for a display panel provided by an embodiment of the present invention. Detailed implementation manners

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] 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 do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances 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 "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0046] As described in the background art, the existing pixel circuit has a weak ability to maintain the data voltage. After research by the inventor, it is found that the reason for this problem is that the pixel circuit includes a driving transistor, which is used to drive a light-emitting device to emit light according to the data voltage of its gate during the light-emitting stage, and the gate voltage holding ability of the driving transistor is weak. In addition, the pixel circuit also includes a transistor connected to the gate of the driving transistor. During the light-emitting stage, the transistor connected to the gate of the driving transistor has leakage, resulting in a leakage path between the driving transistor and the transistor connected to the gate of the driving transistor, causing the gate voltage of the driving transistor to be unstable, further weakening the gate voltage holding ability of the driving transistor, which will cause the display brightness to decay within one frame, resulting in a flickering display screen and affecting the display effect.

[0047] In view of the above problems, an embodiment of the present invention provides a display panel. Figure 1 It is a schematic structural diagram of a first pixel circuit, a second pixel circuit and a first switching module provided by an embodiment of the present invention. Refer to Figure 1 , the display panel includes: a first pixel circuit 10, a second pixel circuit 20 and a first switching module 30.

[0048] The first pixel circuit 10 and the second pixel circuit 20 both include a storage module 110, a driving module 120, and a light-emitting module 130. A first end of the storage module 110 is connected to a fixed voltage, and a second end thereof is connected to a control terminal G of the driving module 120. The driving module 120 is configured to drive the light-emitting module 130 to emit light according to the voltage of its control terminal G during a light-emitting stage.

[0049] A first switching module 30 is connected between a second end of the storage module 110 in the first pixel circuit 10 and a second end of the storage module 110 in the second pixel circuit 20, and is configured to conduct during a light-emitting stage in a preset low-frequency display mode to connect the storage module 110 in the first pixel circuit 10 and the storage module 110 in the second pixel circuit 20 in parallel.

[0050] Wherein, the light-emitting stages of the first pixel circuit 10 and the second pixel circuit 20 are the same, and the first pixel circuit 10 and the second pixel circuit 20 are arranged adjacent to each other and / or the light-emitting colors of the light-emitting modules 130 in the first pixel circuit 10 and the second pixel circuit 20 are the same.

[0051] Specifically, the structures of the first pixel circuit 10 and the second pixel circuit 20 may be the same. Wherein, the driving module 120 and the light-emitting module 130 are connected in series between a first power supply line ELVDD and a second power supply line ELVSS. The first power supply line ELVDD is connected to a first power supply voltage, and the second power supply line ELVSS is connected to a second power supply voltage. The first power supply voltage is a positive voltage, and the second power supply voltage is a negative voltage or 0V. The first end of the storage module 110 may be connected to any fixed voltage. In each embodiment of the present invention, it is described by taking the first end of the storage module 110 being connected to the first power supply voltage on the first power supply line ELVDD as an example.

[0052] Optionally, the first pixel circuit 10 and the second pixel circuit 20 further include a data writing module 140. A first end of the data writing module 140 is connected to a data voltage Data, and a second end of the data writing module 140 is connected to the driving module 120. The data writing module 140 is configured to write the data voltage Data to the driving module 120 during a data writing stage. Wherein, the second end of the data writing module 140 may be connected to the control terminal G of the driving module 120 to write the data voltage Data to the control terminal G of the driving module 120 through the data writing module 140 during the data writing stage.

[0053] The preset low-frequency display mode is a display mode with a relatively low refresh rate. The preset low-frequency display mode can be set as a display mode with a refresh rate lower than a preset frequency, and the preset frequency is a relatively low refresh rate. For example, the preset frequency can be less than or equal to 60 Hz. When the preset frequency is 60 Hz, the preset low-frequency display mode is a display mode with a refresh rate lower than 60 Hz. When the preset frequency is 40 Hz, the preset low-frequency display mode is a display mode with a refresh rate lower than 40 Hz. When the preset frequency is 20 Hz, the preset low-frequency display mode is a display mode with a refresh rate lower than 20 Hz. The preset frequency can also be set to other low-frequency values according to requirements, and this embodiment does not limit this. Optionally, the preset low-frequency display mode includes the Always on Display (AOD) mode.

[0054] In one embodiment, the light-emitting phases of the first pixel circuit 10 and the second pixel circuit 20 can be set to be the same, that is, the first pixel circuit 10 and the second pixel circuit 20 simultaneously drive their respective corresponding light-emitting modules 130 to emit light, and the first pixel circuit 10 and the second pixel circuit 20 are arranged adjacent to each other, that is, the first pixel circuit 10 and the second pixel circuit 20 are arranged adjacent to each other in their arrangement direction. Figure 1 It shows the situation where the first pixel circuit 10 and the second pixel circuit 20 are located in the same column and are adjacent to each other. In other embodiments, the first pixel circuit 10 and the second pixel circuit 20 can also be located in the same row and are adjacent to each other.

[0055] In another embodiment, the light-emitting phases of the first pixel circuit 10 and the second pixel circuit 20 can be set to be the same, and the light-emitting colors of the light-emitting modules 130 in the first pixel circuit 10 and the second pixel circuit 20 are the same. For example, when the light-emitting modules 130 in the display panel include a red light-emitting module, a green light-emitting module, and a blue light-emitting module, the light-emitting modules 130 in the first pixel circuit 10 and the second pixel circuit 20 can both be the red light-emitting module, or both be the green light-emitting module, or both be the blue light-emitting module.

[0056] In other embodiments, it can also be set that the light-emitting phases of the first pixel circuit 10 and the second pixel circuit 20 are the same, the first pixel circuit 10 and the second pixel circuit 20 are arranged adjacent to each other, and the light-emitting colors of the light-emitting modules 130 in the first pixel circuit 10 and the second pixel circuit 20 are the same.

[0057] Exemplarily, the operating phases of the first pixel circuit 10 and the second pixel circuit 20 at least include a data writing phase and a light emitting phase. During the data writing phase in the normal display mode (i.e., the display mode other than the preset low-frequency display mode): control the first switch module 30 to turn off to disconnect the storage module 110 in the first pixel circuit 10 and the storage module 110 in the second pixel circuit 20. Control the data writing modules 140 in the first pixel circuit 10 and the second pixel circuit 20 to turn on, so as to write the corresponding data voltage Data to the control terminal G of the driving module 120 in the first pixel circuit 10 through the data writing module 140 in the first pixel circuit 10, and store the data voltage Data through the storage module 110 in the first pixel circuit 10. At the same time, write the corresponding data voltage Data to the control terminal G of the driving module 120 in the second pixel circuit 20 through the data writing module 140 in the second pixel circuit 20, and store the data voltage Data through the storage module 110 in the second pixel circuit 20.

[0058] During the light emitting writing phase in the normal display mode (i.e., the display mode other than the preset low-frequency display mode): control the first switch module 30 to turn off to disconnect the storage module 110 in the first pixel circuit 10 and the storage module 110 in the second pixel circuit 20. Control the discharge path between the first power supply line ELVDD and the second power supply line ELVSS in the first pixel circuit 10 to turn on, so that the driving module 120 in the first pixel circuit 10 generates a driving current according to the data voltage Data at its own control terminal G to drive the light emitting module 130 in the first pixel circuit 10 to emit light. At the same time, control the discharge path between the first power supply line ELVDD and the second power supply line ELVSS in the second pixel circuit 20 to turn on, so that the driving module 120 in the second pixel circuit 20 generates a driving current according to the data voltage Data at its own control terminal G to drive the light emitting module 130 in the second pixel circuit 20 to emit light.

[0059] Data writing stage in the preset low-frequency display mode: Control the first switch module 30 to turn off to disconnect the storage module 110 in the first pixel circuit 10 and the storage module 110 in the second pixel circuit 20. Control the data writing modules 140 in the first pixel circuit 10 and the second pixel circuit 20 to turn on, so as to write corresponding data voltages Data to the control terminals G of the corresponding driving modules 120 respectively through the data writing modules 140 in the first pixel circuit 10 and the second pixel circuit 20, and store the corresponding data voltages Data respectively through the storage modules 110 in the first pixel circuit 10 and the second pixel circuit 20. Since the storage modules 110 in the first pixel circuit 10 and the second pixel circuit 20 are independent of each other, the writing of the data voltages in the first pixel circuit 10 and the second pixel circuit 20 does not affect each other, which helps to ensure the charging rate of the storage modules 110 in the first pixel circuit 10 and the second pixel circuit 20.

[0060] Light-emitting stage in the preset low-frequency display mode: Control the first switch module 30 to turn on to parallel the storage module 110 in the first pixel circuit 10 and the storage module 110 in the second pixel circuit 20. Control the driving modules 120 in the first pixel circuit 10 and the second pixel circuit 20 to generate driving currents respectively according to the data voltages Data at their control terminals G to drive the corresponding light-emitting modules 130 to emit light simultaneously. During this period, the control terminals G of the driving modules 120 in the first pixel circuit 10 and the second pixel circuit 20 are both connected to the two paralleled storage modules 110 (i.e., the storage module 110 in the first pixel circuit 10 and the storage module 110 in the second pixel circuit 20). The storage module 110 may include a storage capacitor, and the total capacitance value of the two paralleled storage modules 110 is the sum of the capacitance values of the two storage modules 110, so that the overall voltage storage capacity of the two paralleled storage modules 110 is increased, thereby improving the voltage holding capacity of the control terminal G of the driving module 120, which helps to alleviate the attenuation of the display brightness of the light-emitting module 130 during the light-emitting stage, thus alleviating the flicker problem of the display panel and improving the display effect.

[0061] In the light-emitting stage of the technical solution of the embodiment of the present invention in the preset low-frequency display mode, by controlling the first switch module to conduct, the storage modules in the first pixel circuit and the second pixel circuit can be connected in parallel, so that the control ends of the driving modules in the first pixel circuit and the second pixel circuit are both connected to the two storage modules connected in parallel, and the overall voltage storage capacity of the two storage modules connected in parallel is increased, thereby improving the voltage holding capacity of the control end of the driving module, helping to alleviate the leakage problem of the control end of the driving module, and alleviating the display brightness attenuation in the light-emitting stage of the light-emitting module in the preset low-frequency display mode, thereby reducing the flicker problem of the display panel and improving the display effect. In addition, in the data writing stage and the normal display mode of the preset low-frequency display mode, by controlling the first switch module to turn off, the connection between the storage modules in the first pixel circuit and the second pixel circuit can be disconnected, so that the storage modules in the first pixel circuit and the second pixel circuit are independent of each other, so that the data voltage writing processes of the first pixel circuit and the second pixel circuit do not affect each other, which helps to ensure the charging rate of the storage modules in the first pixel circuit and the second pixel circuit.

[0062] Figure 2 FIG. is a schematic structural diagram of another first pixel circuit, a second pixel circuit, and a first switch module provided by an embodiment of the present invention. Refer to Figure 2 , optionally, the first pixel circuit 10 and the second pixel circuit 20 further include a light-emitting control module 150. The light-emitting control module 150, the driving module 120, and the light-emitting module 130 are connected between a first power supply line ELVDD and a second power supply line ELVSS. The control ends of the light-emitting control modules 150 in the first pixel circuit 10 and the second pixel circuit 20 are connected to the same light-emitting control signal EM, and are used to conduct or turn off in response to the light-emitting control signal EM, so that the light-emitting stages of the first pixel circuit 10 and the second pixel circuit 20 are the same.

[0063] Continue to refer to Figure 2, Further, the preset low-frequency display mode includes the always-on display mode, and the display panel further includes an always-on control signal line. The first switching module 30 includes a first switching unit 310 and a second switching unit 320. The control end of the first switching unit 310 is connected to the always-on control signal line, the first end of the first switching unit 310 is connected to the control end of the light-emitting control module 150 in the first pixel circuit 10 and the second pixel circuit 20, the second end of the first switching unit 310 is connected to the control end of the second switching unit 320, and the first switching unit 310 is configured to be turned on in the always-on display mode in response to the signal on the always-on control signal line to write the light-emitting control signal EM to the control end of the second switching unit 320. The second switching unit 320 is connected between the second ends of the storage modules 110 in the first pixel circuit 10 and the second pixel circuit 20, and is configured to be turned on during the light-emitting stage in the always-on display mode in response to the light-emitting control signal EM to parallel the storage modules 110 in the first pixel circuit 10 and the storage modules 110 in the second pixel circuit 20.

[0064] Specifically, the always-on control signal line receives the always-on control signal AOD, and the always-on control signal AOD includes a conductive level signal and a cutoff level signal. When the always-on control signal AOD is the conductive level signal, the display panel operates in the always-on display mode, and the current always-on control signal AOD can control the first switching unit 310 to be turned on; when the always-on control signal AOD is the cutoff level signal, the display panel operates in a non-always-on display mode (such as the normal display mode), and the current always-on control signal AOD can control the first switching unit 310 to be turned off.

[0065] Exemplarily, during the light-emitting stage in the always-on display mode, both the always-on control signal AOD and the light-emitting control signal EM are conductive level signals. The light-emitting control modules 150 in the first pixel circuit 10 and the second pixel circuit 20 are both turned on in response to the light-emitting control signal EM, so that the discharge path between the first power supply line ELVDD and the second power supply line ELVSS is turned on. The driving module 120 generates a driving current according to the data voltage Data at its control end G to drive the light-emitting module 130 in the first pixel circuit 10 to emit light. At the same time, the first switching unit 310 is turned on in response to the always-on control signal AOD to write the light-emitting control signal EM to the control end of the second switching unit 320, and the second switching unit 320 is turned on in response to the light-emitting control signal EM to parallel the storage modules 110 in the first pixel circuit 10 and the storage modules 110 in the second pixel circuit 20, thereby improving the voltage holding ability of the control end G of the driving module 120 in the first pixel circuit 10 and the second pixel circuit 20 in the always-on display mode.

[0066] In the normal display mode, the always-on display (AOD) screen-off control signal is at an off-level signal. The first switch unit 310 is turned off in response to the AOD screen-off control signal. The control terminal of the second switch unit 320 is not connected to a signal, and the second switch unit 320 remains off to disconnect the storage module 110 in the first pixel circuit 10 from the storage module 110 in the second pixel circuit 20, making the storage modules 110 in the first pixel circuit 10 and the second pixel circuit 20 independent of each other.

[0067] Continue to refer to Figure 2 , further, the first switch unit 310 includes a first transistor T1, and the second switch unit 320 includes a second transistor T2. The gate of the first transistor T1 is connected to the AOD screen-off control signal line. The first pole of the first transistor T1 is connected to the control terminal of the light-emitting control module 150 in the first pixel circuit 10 and the second pixel circuit 20. The second pole of the first transistor T1 is connected to the gate of the second transistor T2. The first pole of the second transistor T2 is connected to the second terminal of the storage module 110 in the first pixel circuit 10, and the second pole of the second transistor T2 is connected to the second terminal of the storage module 110 in the second pixel circuit 20. The light-emitting control module 150 includes a third transistor T3. The third transistor T3 is connected between the first power supply line ELVDD and the second power supply line ELVSS. The gate of the third transistor T3 is connected to the light-emitting control signal EM. The first pole of the first transistor T1 is connected to the gate of the third transistor T3. The second transistor T2 and the third transistor T3 are of the same type. Further, the light-emitting control module 150 may also include a fourth transistor T4. The fourth transistor T4 is connected between the first power supply line ELVDD and the second power supply line ELVSS. The gate of the fourth transistor T4 is connected to the light-emitting control signal EM. The third transistor T3 and the fourth transistor T4 are of the same type.

[0068] Among them, the first transistor T1 to the fourth transistor T4 can be either P-type transistors or N-type transistors. When the second transistor T2 is a P-type transistor, the third transistor T3 and the fourth transistor T4 are also P-type transistors (as Figure 2 shown). When the second transistor T2 is an N-type transistor, the third transistor T3 and the fourth transistor T4 are also N-type transistors.

[0069] Continue to refer to Figure 2, Further, the first pixel circuit 10 and the second pixel circuit 20 further include a data writing module 140, an initialization module 160, and a threshold compensation module 170. The first end of the initialization module 160 is connected to the initialization voltage Vref, the second end of the initialization module 160 is connected to the control terminal G of the driving module 120, and the initialization module 160 is configured to write the initialization voltage Vref to the control terminal G of the driving module 120 during the initialization phase. The first end of the data writing module 140 is connected to the data voltage Data, and the second end of the data writing module 140 is connected to the first end of the driving module 120. The threshold compensation module 170 is connected between the second end of the driving module 120 and the control terminal G, and is configured to compensate the threshold voltage of the driving module 120.

[0070] In the light-emitting phase of the screen-off display mode, according to the technical solution of the embodiment of the present invention, by paralleling the storage module 110 in the first pixel circuit 10 and the storage module 110 in the second pixel circuit 20, the control terminals G of the driving modules 120 in the first pixel circuit 10 and the second pixel circuit 20 are both connected to the two paralleled storage modules 110, and the overall voltage storage capacity of the two paralleled storage modules 110 is increased, thereby improving the voltage holding capacity of the control terminal G of the driving module 120. Since there is a voltage difference between the voltage of the control terminal G of the driving module 120 and the initialization voltage Vref connected to the first end of the initialization module 160, this solution helps to avoid the formation of a leakage path between the control terminal G of the driving module 120 and the first end of the initialization module 160, and avoid the formation of a leakage path between the second end of the driving module 120, the threshold compensation module 170 and the control terminal G of the driving module 120, thereby alleviating the flicker problem caused by leakage and helping to improve the display effect.

[0071] Continue to refer to Figure 2, Further, the driving module 120 includes a driving transistor DT, the storage module 110 includes a storage capacitor Cst, and the light-emitting module 130 includes a light-emitting device D1. The driving transistor DT and the light-emitting device D1 are connected between a first power supply line ELVDD and a second power supply line ELVSS. A first pole of the storage capacitor Cst is connected to a fixed voltage (such as a first power supply voltage on the first power supply line ELVDD), a second pole of the storage capacitor Cst is connected to a gate of the driving transistor DT, and the first switching module 30 is connected between the second poles of the storage capacitors Cst in the first pixel circuit 10 and the second pixel circuit 20. The data writing module 140 includes a fifth transistor T5. A gate of the fifth transistor T5 is connected to a second scan signal Scan2, a first pole of the fifth transistor T5 is connected to a data voltage Data, and a second pole of the fifth transistor T5 is connected to the driving module 120. Wherein, when a second end of the data writing module 140 is connected to a first end of the driving module 120, the second pole of the fifth transistor T5 is connected to the first end of the driving module 120 (as Figure 2 shown). When a second end of the data writing module 140 is connected to a control terminal G of the driving module 120, the second pole of the fifth transistor T5 is connected to the control terminal G of the driving module 120. The initialization module 160 includes a sixth transistor T6. A gate of the sixth transistor T6 is connected to a first scan signal Scan1, a first pole of the sixth transistor T6 is connected to an initialization voltage Vref, and a second pole of the sixth transistor T6 is connected to the control terminal G of the driving module 120. The threshold compensation module 170 includes a seventh transistor T7. A gate of the seventh transistor T7 is connected to a second scan signal Scan2, a first pole of the seventh transistor T7 is connected to a second end of the driving module 120, and a second pole of the seventh transistor T7 is connected to the control terminal G of the driving module 120.

[0072] Each transistor in the first pixel circuit 10, the second pixel circuit 20, and the first switching module 30 can be either a P-type transistor or an N-type transistor. Figure 2 Schematically shows a case where each transistor in the first pixel circuit 10, the second pixel circuit 20, and the first switching module 30 is a P-type transistor. The light-emitting device D1 includes an Organic Light-Emitting Diode (OLED), an Active Matrix Organic Light Emitting Diode (AMOLED), a Micro-LED at the micron level, etc.

[0073] Figure 3 is a driving timing diagram provided by an embodiment of the present invention for driving Figure 2The first pixel circuit 10, the second pixel circuit 20, and the first switch module 30 in Figure 2 and Figure 3 are operating. Hereinafter, taking each transistor in the first pixel circuit 10, the second pixel circuit 20, and the first switch module 30 as a P-type transistor, and the preset low-frequency display mode including the always-on display mode as an example for explanation.

[0074] Exemplarily, the operating phases of the first pixel circuit 10 and the second pixel circuit 20 include an initialization phase t1, a data writing phase t2, and a light emitting phase t3. In the always-on display mode, the always-on display signal AOD is a low-level signal.

[0075] In the initialization phase t1 of the always-on display mode, the first scan signal Scan is a low-level signal, the second scan signal Scan2 and the light emission control signal EM are high-level signals. The first transistor T1 is turned on, the second transistor T2 is turned off, and the storage capacitors Cst in the first pixel circuit 10 and the second pixel circuit 20 are independent of each other. The sixth transistor T6 in the first pixel circuit 10 and the second pixel circuit 20 is turned on, and other transistors are turned off. The initialization voltage Vref is written into the gate of the driving transistor DT through the sixth transistor T6 to initialize the gate voltage of the driving transistor DT, and at the same time control the driving transistor DT to be turned on.

[0076] In the data writing phase t2 of the always-on display mode, the second scan signal Scan2 is a low-level signal, the first scan signal Scan and the light emission control signal EM are high-level signals. The first transistor T1 remains turned on, and the second transistor T2 remains turned off. The driving transistor DT, the fifth transistor T5, and the seventh transistor T7 in the first pixel circuit 10 and the second pixel circuit 20 are turned on, and other transistors are turned off. The data voltage Data is sequentially written into the gate of the driving transistor DT through the fifth transistor T5, the driving transistor DT, and the seventh transistor T7. The storage capacitors Cst in the first pixel circuit 10 and the second pixel circuit 20 respectively store the corresponding data voltage Data. Since the storage capacitors Cst in the first pixel circuit 10 and the second pixel circuit 20 are independent of each other, the data writing processes of the first pixel circuit 10 and the second pixel circuit 20 do not affect each other, which helps to ensure the charging rate of the storage capacitors Cst in the first pixel circuit 10 and the second pixel circuit 20.

[0077] During the light-emitting stage t3 in the off-screen display mode, the light-emitting control signal EM is a low-level signal, and the first scan signal Scan and the second scan signal Scan2 are high-level signals. The first transistor T1 and the second transistor T2 are turned on, and the storage capacitors Cst in the first pixel circuit 10 and the storage capacitors Cst in the second pixel circuit 20 are connected in parallel. The third transistor T3, the fourth transistor T4, and the driving transistor DT in the first pixel circuit 10 and the second pixel circuit 20 are turned on, and the discharge path between the first power supply line ELVDD and the second power supply line ELVSS is turned on. The driving transistor DT generates a driving current according to its gate voltage to drive the light-emitting device D1 to emit light. During this period, the gates of the driving transistors DT in the first pixel circuit 10 and the second pixel circuit 20 are both connected to the two storage capacitors Cst connected in parallel (i.e., the storage capacitor Cst in the first pixel circuit 10 and the storage capacitor Cst in the second pixel circuit 20). The total capacitance value of the two storage capacitors Cst connected in parallel is the sum of the capacitance values of the two storage capacitors Cst, so that the overall voltage storage capacity of the two storage capacitors Cst connected in parallel is increased, thereby improving the gate voltage holding ability of the driving transistor DT, helping to avoid the formation of a leakage path between the gate of the driving transistor DT and the first pole of the sixth transistor T6, and avoiding the formation of a leakage path between the second pole of the driving transistor DT, the seventh transistor T7 and the gate of the driving transistor DT, thereby alleviating the flicker problem caused by leakage and helping to improve the display effect.

[0078] Figure 4 is a schematic structural diagram of a display panel provided by an embodiment of the present invention. The specific structures of the first pixel circuit 10 and the second pixel circuit 20 therein, and the connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 can be the same as Figure 2 the specific structures of the first pixel circuit 10 and the second pixel circuit 20 shown, and the connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20. In other embodiments, the specific structures of the first pixel circuit 10 and the second pixel circuit 20 in the display panel, and the connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 can also be the same as Figure 1 the situation shown, or when the structures of the first pixel circuit 10 and the second pixel circuit 20 are in other forms, the connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 can also be set with reference to the above embodiments. This embodiment does not make specific limitations on this.

[0079] Combined with Figure 2 and Figure 4, Further, the first pixel circuits 10 and the second pixel circuits 20 are arranged in an array in the display panel, and one row of the first pixel circuits 10 and one row of the second pixel circuits 20 are arranged alternately. The light-emitting phases of one row of the second pixel circuits 20 and the first pixel circuits 10 in the previous row are the same, and the second ends of the storage modules 110 of the second pixel circuits 20 in one column and the second ends of the storage modules 110 of the previous first pixel circuits 10 are connected through the first switch module 30.

[0080] Specifically, the display panel may include multiple rows of pixel circuits arranged in sequence according to the pattern of one row of the first pixel circuits 10, one row of the second pixel circuits 20, one row of the first pixel circuits 10, one row of the second pixel circuits 20... Exemplarily, when the total number of rows of the first pixel circuits 10 and the second pixel circuits 20 in the display panel is 2n, the i-th row is the first pixel circuit 10, and the (i + 1)-th row is the second pixel circuit 20, where 1 ≤ i ≤ 2n - 1. The light-emitting phases of the (i + 1)-th row of pixel circuits (i.e., the second pixel circuits 20) and the i-th row of pixel circuits (i.e., the first pixel circuits 10) are the same. For example, the pixel circuits in the i-th row and the (i + 1)-th row can be driven by the same light-emitting control circuit (or scanning circuit), and the light-emitting control signals EM accessed by them are the same, so that the light-emitting modules 130 in the pixel circuits of the i-th row and the (i + 1)-th row emit light simultaneously. Correspondingly, the total number of the first pixel circuits 10 and the second pixel circuits 20 in each column of the display panel is 2n, the i-th one is the first pixel circuit 10, and the (i + 1)-th one is the second pixel circuit 20. The second ends of the storage modules 110 of the (i + 1)-th pixel circuit (i.e., the second pixel circuit 20) in each column and the second ends of the storage modules 110 of the i-th pixel circuit (i.e., the first pixel circuit 10) are connected through the corresponding first switch module 30. The technical solution of this embodiment can drive the light-emitting modules 130 in the pixel circuits of the i-th row and the (i + 1)-th row to emit light simultaneously, and in the light-emitting phase in the preset low-frequency display mode, the storage modules 110 of the upper and lower two pixel circuits in each column of the pixel circuits of the i-th row and the (i + 1)-th row can be connected in parallel to improve the voltage holding ability of the control terminal G of the driving module 120, which helps to alleviate the leakage problem of the control terminal G of the driving module 120 and alleviate the display brightness attenuation of the light-emitting module 130 in the light-emitting phase, thereby reducing the flicker problem of the display panel and improving the display effect.

[0081] Combined with Figure 2 and Figure 4, on the basis of the above embodiments, optionally, the first pixel circuit 10 and the second pixel circuit 20 in the same column are arranged adjacent to each other. For example, when a row of first pixel circuits 10, a row of second pixel circuits 20, a row of first pixel circuits 10, a row of second pixel circuits 20... are arranged adjacent to each other in this pattern in the display panel, the first pixel circuit 10 and the second pixel circuit 20 in each column are arranged adjacent to each other. In this way, the light-emitting modules 130 in the adjacent two rows of the first pixel circuit 10 and the second pixel circuit 20 can be driven to emit light simultaneously. And in the light-emitting stage in the preset low-frequency display mode, the upper and lower first pixel circuits 10 and second pixel circuits 20 in each column of the adjacent two rows of the first pixel circuit 10 and the second pixel circuit 20 can be connected in parallel to improve the voltage holding ability of the control terminal G of the driving module 120, which helps to alleviate the leakage problem of the control terminal G of the driving module 120 and alleviate the attenuation of the display brightness of the light-emitting module 130 in the light-emitting stage, thereby reducing the flicker problem of the display panel and improving the display effect.

[0082] Figure 4 Only the case where the first pixel circuit 10 and the second pixel circuit 20 in the same column are arranged adjacent to each other is shown. In other embodiments, other pixel circuits may be arranged between the first pixel circuit 10 and the second pixel circuit 20 in the same column, that is, other rows of pixel circuits may be arranged between a row of first pixel circuits 10 and a row of second pixel circuits 20.

[0083] Combined with Figure 2 and Figure 4, optionally, the light-emitting colors of the light-emitting modules 130 in the first pixel circuit 10 and the second pixel circuit 20 in the same column are the same. Specifically, the light-emitting module 130 in the display panel includes a light-emitting device D1, and the light-emitting device D1 includes at least a red light-emitting device, a green light-emitting device, and a blue light-emitting device. The same meaning that the light-emitting colors of the light-emitting modules 130 in the first pixel circuit 10 and the second pixel circuit 20 in the same column are the same is that the light-emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 in the same column are both red light-emitting devices, or both green light-emitting devices, or both blue devices. When the light-emitting device D1 further includes light-emitting devices of other colors such as white, the light-emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 in the same column can also be both light-emitting devices of other colors. The technical solution of this embodiment can drive the light-emitting devices D1 in the pixel circuits of the i-th row and the (i + 1)-th row to emit light simultaneously, and in the light-emitting stage of the preset low-frequency display mode, the storage modules 110 of the pixel circuits in which the upper and lower two light-emitting devices D1 in each column of the i-th row and the (i + 1)-th row pixel circuits have the same light-emitting color can be connected in parallel to improve the voltage holding ability of the control terminal G of the driving module 120, which helps to alleviate the leakage problem of the control terminal G of the driving module 120 and alleviate the display brightness attenuation of the light-emitting module 130 in the light-emitting stage, thereby reducing the flicker problem of the display panel and improving the display effect.

[0084] Combined with Figure 2 and Figure 4 , as a preferred embodiment of the present invention, the first pixel circuit 10 and the second pixel circuit 20 in the same column can also be arranged adjacent to each other, and at the same time, the light-emitting colors of the light-emitting modules 130 in the first pixel circuit 10 and the second pixel circuit 20 in the same column are set to be the same. In this way, the light-emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 in adjacent rows can be driven to emit light simultaneously, and in the light-emitting stage of the preset low-frequency display mode, the first pixel circuit 10 and the second pixel circuit 20 in which the upper and lower two light-emitting devices D1 in each column of the first pixel circuit 10 and the second pixel circuit 20 in adjacent rows have the same light-emitting color can be connected in parallel, so that the light-emitting colors and light-emitting brightness of the upper and lower two light-emitting devices D1 in each column of the first pixel circuit 10 and the second pixel circuit 20 in adjacent rows are the same, which is equivalent to halving the sub-pixel density (Pixels Per Inch, PPI) in the preset low-frequency display mode, and at the same time improving the voltage holding ability of the control terminal G of the driving module 120, which helps to alleviate the leakage problem of the control terminal G of the driving module 120 and alleviate the display brightness attenuation of the light-emitting module 130 in the light-emitting stage, thereby reducing the flicker problem of the display panel and improving the display effect.

[0085] To verify the beneficial effects of the embodiments of the present invention, the inventors respectively conducted simulation experiments on the existing display panel and the display panel in the above embodiments. Through experiments, it was measured that the driving current change rate of the light-emitting device in the pixel circuit of the existing display panel within one frame in the off-screen display mode was approximately 2.4%. For the technical solution of the above embodiments, by simultaneously driving the light-emitting devices D1 in the adjacent two rows of the first pixel circuit 10 and the second pixel circuit 20 to emit light, and during the light-emitting stage in the off-screen display mode, after paralleling the first pixel circuit 10 and the second pixel circuit 20 in which the upper and lower two light-emitting devices D1 in each column have the same light-emitting color, the driving current change rate of the light-emitting device D1 within one frame was approximately 1.3%. Compared with the prior art, the technical solution of the above embodiments can reduce the driving current change rate of the light-emitting device D1 within one frame by approximately 1.1%. Therefore, this solution helps to alleviate the display brightness attenuation of the light-emitting device D1 during the light-emitting stage in the off-screen display mode, thereby reducing the flicker problem of the display panel and improving the display effect.

[0086] Figure 5 FIG. 4 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. The specific structures of the first pixel circuit 10 and the second pixel circuit 20 therein, and the connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 can be the same as Figure 2 the specific structures of the first pixel circuit 10 and the second pixel circuit 20 shown in FIG. 2, and the connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20. In other embodiments, the specific structures of the first pixel circuit 10 and the second pixel circuit 20 in the display panel, and the connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 can also be the same as Figure 1 the situation shown in FIG. 3, or when the structures of the first pixel circuit 10 and the second pixel circuit 20 are in other forms, the connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 can also be set with reference to the above embodiments. This embodiment does not make specific limitations on this.

[0087] Combined with Figure 2 and Figure 5, based on the above embodiments, optionally, the light-emitting module 130 includes at least a first light-emitting module, a second light-emitting module, and a third light-emitting module with different light-emitting colors. A first pixel circuit 10 and a second pixel circuit 20 including the first light-emitting module in one column, a first pixel circuit 10 and a second pixel circuit 20 including the second light-emitting module in one column, and a first pixel circuit 10 and a second pixel circuit 20 including the third light-emitting module in one column are alternately arranged in the display panel. The display panel further includes a second switch module 40. The first end of the second switch module 40 is connected to the second end of the storage module 110 of a second pixel circuit 20 in one row, and the second end of the second switch module 40 is connected to the second end of the storage module 110 of the second pixel circuit 20 with the same light-emitting color as the next light-emitting module 130 in the same row. The second switch module 40 is configured to conduct during the light-emitting stage in the preset low-frequency display mode to parallel the storage modules 110 in the corresponding second pixel circuits 20.

[0088] Exemplarily, the light-emitting device D1 in the first light-emitting module may be a red light-emitting device, the light-emitting device D1 in the second light-emitting module may be a green light-emitting device, and the light-emitting device D1 in the third light-emitting module may be a blue light-emitting device. Taking the display panel including 3m columns of pixel circuits as an example, the light-emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 in the j-th column are both red light-emitting devices, the light-emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 in the (j + 1)-th column are both green light-emitting devices, and the light-emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 in the (j + 2)-th column are both blue light-emitting devices, where 1 ≤ j ≤ 3m - 2, such that the light-emitting devices D1 in each column of the display panel are arranged in the form of one column of red light-emitting devices, one column of green light-emitting devices, one column of blue light-emitting devices, one column of red light-emitting devices, one column of green light-emitting devices, one column of blue light-emitting devices... arranged in this pattern in sequence.

[0089] Combined with Figure 2 and Figure 5, the light-emitting devices D1 in the first pixel circuits 10 and the second pixel circuits 20 in the first column and the fourth column are all red light-emitting devices, the light-emitting devices D1 in the first pixel circuits 10 and the second pixel circuits 20 in the second column and the fifth column are all green light-emitting devices, and the light-emitting devices D1 in the first pixel circuits 10 and the second pixel circuits 20 in the third column and the sixth column are all blue light-emitting devices. The second ends of the storage modules 110 of the second pixel circuits 20 in the first column of the second row and the second ends of the storage modules 110 of the second pixel circuits 20 in the fourth column of the second row are connected through a second switch module 40. The second ends of the storage modules 110 of the second pixel circuits 20 in the second column of the second row and the second ends of the storage modules 110 of the second pixel circuits 20 in the fifth column of the second row are connected through a second switch module 40. The second ends of the storage modules 110 of the second pixel circuits 20 in the third column of the second row and the second ends of the storage modules 110 of the second pixel circuits 20 in the sixth column of the second row are connected through a second switch module 40. In the light-emitting stage of the preset low-frequency display mode, by controlling the first switch module 30 and the second switch module 40 to conduct, the four storage modules 110 in the first pixel circuits 10 and the second pixel circuits 20 in the first column and the four storage modules 110 in the first pixel circuits 10 and the second pixel circuits 20 in the fourth column can be connected in parallel, the four storage modules 110 in the first pixel circuits 10 and the second pixel circuits 20 in the second column and the four storage modules 110 in the first pixel circuits 10 and the second pixel circuits 20 in the fifth column can be connected in parallel, and the four storage modules 110 in the first pixel circuits 10 and the second pixel circuits 20 in the third column and the four storage modules 110 in the first pixel circuits 10 and the second pixel circuits 20 in the sixth column can be connected in parallel. The technical solution of this embodiment, in the light-emitting stage of the preset low-frequency display mode, by connecting in parallel the storage modules 110 in the four pixel circuits with the same light-emitting color of the light-emitting devices D1 in two columns of the second pixel circuits 20 in one row and the first pixel circuits 10 in the previous row, so that the control terminal G of the driving module 120 of each pixel circuit in the four pixel circuits is connected to the four parallel-connected storage modules 110. When the capacitance values in the respective storage modules 110 are equal, the total capacitance value of the four parallel-connected storage modules 110 is four times the capacitance value of one storage module 110, which is equivalent to increasing the voltage holding capacity of the control terminal of the driving module 120 of each pixel circuit, helping to alleviate the leakage problem of the control terminal of the driving module, and alleviating the display brightness attenuation in the light-emitting stage of the light-emitting module in the preset low-frequency display mode, thereby reducing the flicker problem of the display panel and improving the display effect.

[0090] In other stages except the light-emitting stage of the preset low-frequency display mode (such as the initialization stage, data writing stage, and normal display stage in the preset low-frequency display mode), the second switch module 40 can be controlled to turn off so that the storage module 110 in the corresponding second pixel circuit 20 remains independent.

[0091] Combined with Figure 2 and Figure 5 Further, the second switching module 40 includes a third switching unit 410 and a fourth switching unit 420. The control end of the third switching unit 410 is connected to the screen-off control signal line. The first end of the third switching unit 410 accesses the emission control signal EM accessed by the emission control module 150 in a corresponding row of the second pixel circuits 20. The second end of the third switching unit 410 is connected to the control end of the fourth switching unit 420. The third switching unit 410 is configured to be turned on in the screen-off display mode in response to the screen-off control signal AOD on the screen-off control signal line, so as to write the emission control signal EM to the control end of the fourth switching unit 420. The first end of the fourth switching unit 420 is connected to the second end of the storage module 110 of a second pixel circuit 20 in a row. The second end of the fourth switching unit 420 is connected to the second end of the storage module 110 of the second pixel circuit 20 with the same emission color as the next emission module 130 in the same row. The fourth switching unit 420 is configured to be turned on in the emission stage in the screen-off display mode in response to the emission control signal EM, so as to connect the storage modules 110 in the corresponding second pixel circuits 20 in parallel.

[0092] Combined with Figure 2 and Figure 5 Further, the third switching unit 410 includes an eighth transistor T8, and the fourth switching unit 420 includes a ninth transistor T9. The gate of the eighth transistor T8 is connected to the screen-off control signal line. The first pole of the eighth transistor T8 accesses the emission control signal EM accessed by the emission control module 150 in a corresponding row of the second pixel circuits 20. The second pole of the eighth transistor T8 is connected to the gate of the ninth transistor T9. The first pole of the ninth transistor T9 is connected to the second end of the storage module 110 of a second pixel circuit 20 in a row. The second pole of the ninth transistor T9 is connected to the second end of the storage module 110 of the second pixel circuit 20 with the same emission color as the next emission module 130 in the same row. Wherein, the eighth transistor T8 and the ninth transistor T9 can be either P-type transistors or N-type transistors, and the ninth transistor T9 is of the same type as the second transistor T2, the third transistor T3, and the fourth transistor T4.

[0093] Based on the above embodiments, the display panel includes a substrate, and a light-shielding layer, an active layer, and a multi-layer metal layer sequentially located on the substrate. The first pixel circuit 10 and the second pixel circuit 20 are formed in the active layer and the multi-layer metal layer, and the screen-off control signal line is disposed in the same layer as at least one of the light-shielding layer and the multi-layer metal layer.

[0094] Exemplarily, the substrate can provide functions such as buffering, protecting, or supporting for the display panel. The light-shielding layer is located between the substrate and the active layer and is used for light shielding. The multi-layer metal layer includes a first metal layer, a second metal layer, a third metal layer, and a fourth metal layer that are sequentially located on the side of the substrate away from the active layer. The gates of the transistors and the first electrodes of the storage capacitors in the first pixel circuit 10 and the second pixel circuit 20 are located on the first metal layer, the second electrodes of the storage capacitors are located on the second metal layer, and the sources and drains of the transistors are located on the third metal layer. The screen-off control signal line can be arranged on the same layer as at least one of the light-shielding layer, the first metal layer, the second metal layer, the third metal layer, and the fourth metal layer. The screen-off control signal line can also jump to the first metal layer or the second metal layer in the lower border area of the display panel to connect to the corresponding signal pads.

[0095] An embodiment of the present invention further provides a display device, which can be a mobile phone, a computer, a tablet computer, or the like. The display device includes the display panel in any of the above embodiments, and thus has the corresponding structure and beneficial effects of the display panel, which will not be elaborated here.

[0096] An embodiment of the present invention further provides a driving method for a display panel, which is used to drive the display panel in any of the above embodiments to work. Figure 6 is a schematic flowchart of a driving method for a display panel provided by an embodiment of the present invention. Refer to Figure 6 , and the method specifically includes the following steps:

[0097] S110. Control the first switch module to conduct in the light-emitting stage in the preset low-frequency display mode to parallel the storage modules in the first pixel circuit and the second pixel circuit.

[0098] S120. Control the first switch module to turn off in other stages except the light-emitting stage in the preset low-frequency display mode to disconnect the storage modules in the first pixel circuit and the second pixel circuit.

[0099] In the technical solution of the embodiment of the present invention, during the light-emitting stage in the preset low-frequency display mode, by controlling the first switch module to conduct, the storage modules in the first pixel circuit and the second pixel circuit can be connected in parallel, so that the control ends of the driving modules in the first pixel circuit and the second pixel circuit are both connected to the two storage modules connected in parallel, and the overall voltage storage capacity of the two storage modules connected in parallel increases, thereby improving the voltage holding capacity of the control end of the driving module, helping to alleviate the leakage problem of the control end of the driving module, and alleviating the display brightness attenuation during the light-emitting stage in the preset low-frequency display mode, thereby reducing the flicker problem of the display panel and improving the display effect. In addition, during the data writing stage and the normal display mode in the preset low-frequency display mode, by controlling the first switch module to turn off, the connection between the storage modules in the first pixel circuit and the second pixel circuit can be disconnected, so that the storage modules in the first pixel circuit and the second pixel circuit are independent of each other, so that the data voltage writing processes of the first pixel circuit and the second pixel circuit do not affect each other, which helps to ensure the charging rate of the storage modules in the first pixel circuit and the second pixel circuit.

[0100] Based on the above embodiments, optionally, step S110 specifically includes:

[0101] Controlling the first switch unit to conduct in the standby display mode in response to the signal on the standby control signal line to write a light-emitting control signal to the control end of the second switch unit; and the second switch unit conducts in the light-emitting stage in the standby display mode in response to the light-emitting control signal to connect the storage module in the first pixel circuit and the storage module in the second pixel circuit in parallel.

[0102] The above specific implementation manners do not constitute a limitation to the protection scope of the present 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 principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A display panel, characterized in that, Comprising: A first pixel circuit and a second pixel circuit, both the first pixel circuit and the second pixel circuit include a storage module, a driving module, and a light-emitting module; a first end of the storage module is connected to a fixed voltage, and a second end is connected to a control end of the driving module; the driving module is configured to drive the light-emitting module to emit light according to the voltage at its control end during the light-emitting stage. A first switch module, connected between the second end of the storage module in the first pixel circuit and the second end of the storage module in the second pixel circuit, and configured to conduct during the light-emitting stage in a preset low-frequency display mode to parallel the storage module in the first pixel circuit and the storage module in the second pixel circuit. Wherein, the light-emitting stages of the first pixel circuit and the second pixel circuit are the same, and the first pixel circuit and the second pixel circuit are adjacent to each other and / or the light-emitting colors of the light-emitting modules in the first pixel circuit and the second pixel circuit are the same.

2. The display panel according to claim 1, wherein The preset low-frequency display mode includes a standby display mode; the first pixel circuit and the second pixel circuit further include a light-emitting control module, the light-emitting control module, the driving module, and the light-emitting module are connected between a first power supply line and a second power supply line, and control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit are connected to the same light-emitting control signal, and are configured to conduct or turn off in response to the light-emitting control signal. The display panel further includes a standby control signal line, and the first switch module includes a first switch unit and a second switch unit; a control end of the first switch unit is connected to the standby control signal line, a first end of the first switch unit is connected to the control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit, a second end of the first switch unit is connected to a control end of the second switch unit, and the first switch unit is configured to conduct in the standby display mode in response to the signal on the standby control signal line to write the light-emitting control signal to the control end of the second switch unit. The second switch unit is connected between the second end of the storage module in the first pixel circuit and the second end of the storage module in the second pixel circuit, and is configured to conduct during the light-emitting stage in the standby display mode in response to the light-emitting control signal to parallel the storage module in the first pixel circuit and the storage module in the second pixel circuit.

3. The display panel according to claim 2, wherein, The first switch unit includes a first transistor, and the second switch unit includes a second transistor. A gate of the first transistor is connected to the standby control signal line, a first pole of the first transistor is connected to the control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit, and a second pole of the first transistor is connected to a gate of the second transistor. A first pole of the second transistor is connected to the second end of the storage module in the first pixel circuit, and a second pole of the second transistor is connected to the second end of the storage module in the second pixel circuit.

4. The display panel according to claim 3, wherein The light-emitting control module includes a third transistor connected between the first power supply line and the second power supply line. The gate of the third transistor receives the light-emitting control signal. The first pole of the first transistor is connected to the gate of the third transistor. The second transistor and the third transistor are of the same type.

5. The display panel according to claim 4, wherein The light-emitting control module further includes a fourth transistor connected between the first power supply line and the second power supply line. The gate of the fourth transistor receives the light-emitting control signal. The third transistor and the fourth transistor are of the same type.

6. The display panel according to claim 2, characterized in that The display panel includes a substrate, and a light-shielding layer, an active layer, and a multi-layer metal layer sequentially located on the substrate. The first pixel circuit and the second pixel circuit are formed in the active layer and the multi-layer metal layer. The off-screen control signal line is disposed on the same layer as at least one of the light-shielding layer and the multi-layer metal layer.

7. The display panel according to claim 1, wherein, The driving module includes a driving transistor, the storage module includes a storage capacitor, and the light-emitting module includes a light-emitting device; The driving transistor and the light-emitting device are connected between the first power supply line and the second power supply line. The first pole of the storage capacitor receives the fixed voltage. The second pole of the storage capacitor is connected to the gate of the driving transistor. The first switching module is connected between the second pole of the storage capacitor in the first pixel circuit and the second pole of the storage capacitor in the second pixel circuit.

8. The display panel according to claim 1, wherein The first pixel circuit and the second pixel circuit further include a data writing module for writing a data voltage to the driving module during a data writing phase. The first switching module is further configured to turn off during other phases except the light-emitting phase in the preset low-frequency display mode to disconnect the storage module in the first pixel circuit and the storage module in the second pixel circuit during the data writing phase.

9. The display panel according to claim 8, wherein The data writing module includes a fifth transistor. The gate of the fifth transistor receives a scanning signal. The first pole of the fifth transistor receives the data voltage. The second pole of the fifth transistor is connected to the driving module.

10. The display panel according to claim 1, characterized in that, The first pixel circuits and the second pixel circuits are arranged in an array in the display panel, and one row of the first pixel circuits and one row of the second pixel circuits are arranged alternately; The light-emitting phases of one row of the second pixel circuits and the first pixel circuits in the previous row are the same. The second ends of the storage modules of the second pixel circuits in one column and the second ends of the storage modules of the previous first pixel circuits are connected through the first switching module.

11. The display panel according to claim 10, wherein, The first pixel circuits and the second pixel circuits in the same column are adjacent to each other; and / or, the light-emitting colors of the light-emitting modules in the first pixel circuits and the second pixel circuits in the same column are the same.

12. The display panel according to claim 10, wherein The light-emitting module at least includes a first light-emitting module, a second light-emitting module, and a third light-emitting module with different light-emitting colors. A column including the first pixel circuit and the second pixel circuit of the first light-emitting module, a column including the first pixel circuit and the second pixel circuit of the second light-emitting module, and a column including the first pixel circuit and the second pixel circuit of the third light-emitting module are alternately arranged in the display panel; The display panel further includes a second switch module. A first end of the second switch module is connected to a second end of the storage module of one of the second pixel circuits in a row, and a second end of the second switch module is connected to a second end of the storage module of the second pixel circuit with the same light-emitting color of the next light-emitting module in the same row. The second switch module is configured to conduct during the light-emitting stage in the preset low-frequency display mode to parallel the storage modules in the corresponding second pixel circuits.

13. A driving method for a display panel, characterized in that, The display panel includes: a first pixel circuit, a second pixel circuit, and a first switch module; both the first pixel circuit and the second pixel circuit include a storage module, a driving module, and a light-emitting module; a first end of the storage module is connected to a fixed voltage, and a second end is connected to a control end of the driving module; the driving module is configured to drive the light-emitting module to emit light according to the voltage at its control end during the light-emitting stage; and it is connected between the second end of the storage module in the first pixel circuit and the second end of the storage module in the second pixel circuit; The driving method of the display panel includes: Controlling the first switch module to conduct during the light-emitting stage in the preset low-frequency display mode to parallel the storage module in the first pixel circuit and the storage module in the second pixel circuit; Wherein, the light-emitting stages of the first pixel circuit and the second pixel circuit are the same, and the first pixel circuit and the second pixel circuit are adjacent to each other and / or the light-emitting modules in the first pixel circuit and the second pixel circuit have the same light-emitting color.

14. The driving method of the display panel according to claim 13, characterized in that, The preset low-frequency display mode includes a standby display mode; the first pixel circuit and the second pixel circuit further include a light-emitting control module. The light-emitting control module, the driving module, and the light-emitting module are connected between a first power line and a second power line. Control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit are connected to the same light-emitting control signal and are configured to conduct or turn off in response to the light-emitting control signal; the display panel further includes a standby control signal line. The first switch module includes a first switch unit and a second switch unit; a control end of the first switch unit is connected to the standby control signal line, a first end of the first switch unit is connected to the control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit, and a second end of the first switch unit is connected to a control end of the second switch unit; the second switch unit is connected between the second end of the storage module in the first pixel circuit and the second end of the storage module in the second pixel circuit; The driving method of the display panel includes: Controlling the first switching unit to be turned on in the off-screen display mode in response to the signal on the off-screen control signal line, so as to write the light-emitting control signal to the control end of the second switching unit; Turning on the second switching unit in the light-emitting stage in the off-screen display mode in response to the light-emitting control signal, so as to connect the storage module in the first pixel circuit and the storage module in the second pixel circuit in parallel.

15. A display device, characterized in that, It includes the display panel according to any one of claims 1-12.

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