CN114863866A

CN114863866A - Display panel, driving method thereof and display device

Info

Publication number: CN114863866A
Application number: CN202210567297.4A
Authority: CN
Inventors: 刘***; 卢慧玲; 许传志; 胡思明
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-08-05

Abstract

The embodiment of the 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. The first pixel circuit and the second pixel circuit each include a storage module, a driving module, and a light emitting module. The first switch module is used for being conducted in a light-emitting stage in a preset low-frequency display mode so as to be connected with the storage module in the first pixel circuit and the storage module in the second pixel circuit in parallel. The light emitting stages of the first pixel circuit and the second pixel circuit are the same, the first pixel circuit and the second pixel circuit are arranged adjacently, 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 scheme of the embodiment of the invention is beneficial to relieving the electric leakage problem of the control end of the driving module and the display brightness attenuation of the light-emitting module in the light-emitting stage under the preset low-frequency display mode, thereby relieving the flicker problem of the display panel and improving the display effect.

Description

Display panel, driving method thereof and display device

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display panel, a driving method thereof and a display device.

Background

With the continuous development of display technology, people have higher and higher performance requirements on display panels. The display panel comprises a pixel circuit, and the conventional pixel circuit has weak capability of maintaining data voltage, so that the display brightness in one frame is attenuated, a display picture flickers, and the display effect is influenced.

Disclosure of Invention

The embodiment of the invention provides a display panel, a driving method thereof and a display device, which are used for improving the voltage holding capacity of a control end of a driving module, relieving the display brightness attenuation of a light-emitting module in a light-emitting stage in a preset low-frequency display mode, reducing the flicker problem of the display panel and improving the display effect.

In a first aspect, an embodiment of the present invention provides a display panel, including:

the pixel circuit comprises a first pixel circuit and a second pixel circuit, wherein the first pixel circuit and the second pixel circuit respectively comprise a storage module, a driving module and a light-emitting module; the first end of the storage module is connected with a fixed voltage, and the second end of the storage module is connected with the control end of the driving module; the driving module is used for driving the light-emitting module to emit light according to the voltage of the control end of the driving module at the light-emitting stage;

a first switch module, connected between a second terminal of the memory module in the first pixel circuit and a second terminal of the memory module in the second pixel circuit, for conducting in a light-emitting stage under a preset low-frequency display mode to connect the memory module in the first pixel circuit and the memory module in the second pixel circuit in parallel;

the light emitting stages of the first pixel circuit and the second pixel circuit are the same, the first pixel circuit and the second pixel circuit are arranged adjacently, and/or the light emitting colors of the light emitting modules in the first pixel circuit and the second pixel circuit are the same.

Optionally, the preset low-frequency display mode includes a message screen display mode; the first pixel circuit and the second pixel circuit further comprise a light emitting control module, the driving module and the light emitting module are connected between a first power line and a second power 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 used for responding to the light emitting control signal to be switched on or switched off;

the display panel also comprises a screen turning control signal line, and the first switch module comprises a first switch unit and a second switch unit; the control end of the first switch unit is connected with the screen-off control signal line, the first end of the first switch unit is connected with the control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit, the second end of the first switch unit is connected with the control end of the second switch unit, and the first switch unit is used for responding to a signal on the screen-off control signal line and conducting in the screen-off display mode so as to write the light-emitting control signal into the control end of the second switch unit;

the second switch 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 used for responding to the light-emitting control signal to be conducted in a light-emitting stage under the information screen display mode so as to connect the storage module in the first pixel circuit and the storage module in the second pixel circuit in parallel.

Optionally, the first switching unit comprises a first transistor, and the second switching unit comprises a second transistor;

the grid electrode of the first transistor is connected with the screen-off control signal line, the first pole of the first transistor is connected with the control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit, and the second pole of the first transistor is connected with the grid electrode of the second transistor;

a first pole of the second transistor is connected to a second terminal of the memory module in the first pixel circuit, and a second pole of the second transistor is connected to a second terminal of the memory module in the second pixel circuit;

preferably, the light emission control module includes a third transistor, the third transistor is connected between the first power line and the second power line, a gate of the third transistor is connected to the light emission control signal, a first pole of the first transistor is connected to a gate of the third transistor, and the second transistor and the third transistor are of the same type;

preferably, the light emission control module further includes a fourth transistor, the fourth transistor is connected between the first power line and the second power line, a gate of the fourth transistor is connected to the light emission control signal, and the third transistor and the fourth transistor are of the same type;

preferably, the display panel includes a substrate, and a light shielding layer, an active layer and a plurality of metal layers sequentially disposed on the substrate, the first pixel circuit and the second pixel circuit are formed in the active layer and the plurality of metal layers, and the information shielding control signal line is disposed in the same layer as at least one of the light shielding layer and the plurality of metal layers.

Optionally, the driving module comprises a driving transistor, the storage module comprises a storage capacitor, and the light emitting module comprises a light emitting device;

the driving transistor and the light emitting device are connected between a first power line and a second power line, a first pole of the storage capacitor is connected to the fixed voltage, a second pole of the storage capacitor is connected to a gate of the driving transistor, and 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;

preferably, the first pixel circuit and the second pixel circuit further include a data writing module, the data writing module is configured to write a data voltage to the driving module in a data writing phase, and the first switching module is further configured to turn off in other phases except for a light emitting phase in the preset low frequency display mode, so as to turn off the memory module in the first pixel circuit and the memory module in the second pixel circuit in the data writing phase;

preferably, the data writing module includes a fifth transistor, a gate of the fifth transistor is connected to a scan signal, a first pole of the fifth transistor is connected to the data voltage, and a second pole of the fifth transistor is connected to the driving module.

Optionally, the first pixel circuits and the second pixel circuits are arranged in an array in the display panel, and a row of the first pixel circuits and a row of the second pixel circuits are alternately arranged;

the light emitting phases of the second pixel circuits in one row and the first pixel circuits in the previous row are the same, and the second end of the memory module of the second pixel circuit in one column is connected with the second end of the memory module of the previous first pixel circuit through the first switch module.

Optionally, the first pixel circuit and the second pixel circuit in the same column are adjacently disposed; and/or the light emitting modules in the first pixel circuit and the second pixel circuit in the same column emit light with the same color.

Optionally, the light emitting modules include at least a first light emitting module, a second light emitting module and a third light emitting module which emit light of different colors, and 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 comprises a second switch module, a first end of the second switch module is connected with a second end of the storage module of one of the second pixel circuits in one row, a second end of the second switch module is connected with a second end of the storage module of the next light-emitting module in the same row, the light-emitting color of the next light-emitting module is the same, and the second switch module is used for conducting at a light-emitting stage in the preset low-frequency display mode so as to connect the corresponding storage modules in the second pixel circuits in parallel.

In a second aspect, an embodiment of the present invention provides a driving method of a display panel, where the display panel includes: the pixel circuit comprises a first pixel circuit, a second pixel circuit and a first switch module; the first pixel circuit and the second pixel circuit respectively comprise a storage module, a driving module and a light-emitting module; the first end of the storage module is connected with a fixed voltage, and the second end of the storage module is connected with the control end of the driving module; the driving module is used for driving the light-emitting module to emit light according to the voltage of the control end of the driving module at the light-emitting stage; a second terminal of the memory block in the first pixel circuit and a second terminal of the memory block in the second pixel circuit;

the driving method of the display panel includes:

controlling the first switch module to be conducted in a light emitting stage under a preset low-frequency display mode so as to connect the storage module in the first pixel circuit and the storage module in the second pixel circuit in parallel;

Optionally, the preset low-frequency display mode includes a message screen display mode; the first pixel circuit and the second pixel circuit further comprise a light emitting control module, the driving module and the light emitting module are connected between a first power line and a second power 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 used for responding to the light emitting control signal to be switched on or switched off; the display panel also comprises a screen turning control signal line, and the first switch module comprises a first switch unit and a second switch unit; the control end of the first switch unit is connected with the screen-off control signal line, the first end of the first switch unit is connected with the control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit, and the second end of the first switch unit is connected with the control end of the second switch unit; the second switching unit is connected between a second terminal of the memory module in the first pixel circuit and a second terminal of the memory module in the second pixel circuit;

the driving method of the display panel includes:

controlling the first switch unit to respond to a signal on the screen displaying control signal line to be conducted in the screen displaying mode so as to write the light-emitting control signal into the control end of the second switch unit;

and responding to the light-emitting control signal through the second switch unit to be conducted in a light-emitting stage in the information screen display mode so as to connect the storage module in the first pixel circuit and the storage module in the second pixel circuit in parallel.

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

According to the display panel, the driving method thereof and the display device provided by the embodiment of the invention, in the light emitting stage in the preset low-frequency display mode, the first switch module is controlled to be conducted, 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 with the two storage modules which are connected in parallel, and the whole voltage storage capacity of the two storage modules which are connected in parallel is increased, thereby improving the voltage holding capacity of the control end of the driving module, being beneficial to relieving the electric leakage problem of the control end of the driving module, relieving the display brightness attenuation of the light emitting module in the light emitting stage in the preset low-frequency display mode, reducing the flicker problem of the display panel and improving the display effect. In addition, in a data writing stage and a normal display mode in a preset low-frequency display mode, the connection of the storage modules in the first pixel circuit and the second pixel circuit can be disconnected by controlling the first switch module to be turned off, so that the storage modules in the first pixel circuit and the second pixel circuit are mutually independent, the data voltage writing processes of the first pixel circuit and the second pixel circuit are not influenced by each other, and the charging rate of the storage modules in the first pixel circuit and the second pixel circuit is favorably ensured.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first pixel circuit, a second pixel circuit and a first switch module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another first pixel circuit, a second pixel circuit and a first switch module according to an embodiment of the present invention;

FIG. 3 is a timing diagram of a driving method according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a driving method of a display panel according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As described in the background art, the conventional pixel circuit has weak capability of maintaining the data voltage, and the inventor has found that the problem is caused by including a driving transistor in the pixel circuit, the driving transistor is used for driving the light emitting device to emit light according to the data voltage of its gate during the light emitting period, the gate voltage holding capability of the driving transistor is weak, and the pixel circuit further includes a transistor connected to the gate of the driving transistor, during the light emitting period, the transistor connected to the gate of the driving transistor has leakage current, so that a leakage path is generated between the driving transistor and the transistor connected to the gate of the driving transistor, the gate voltage of the driving transistor is unstable, the gate voltage holding capability of the driving transistor is further weakened, which may cause the display luminance degradation within one frame, and may cause the display screen to flicker, the display effect is affected.

In view of the foregoing problems, embodiments of the present invention provide a display panel. Fig. 1 is a schematic structural diagram of a first pixel circuit, a second pixel circuit and a first switch module according to an embodiment of the present invention. Referring to fig. 1, the display panel includes: a first pixel circuit 10, a second pixel circuit 20, and a first switching module 30.

The first and

second pixel circuits

10 and 20 each include a memory module 110, a driving module 120, and a light emitting module 130. The first terminal of the memory module 110 is connected to a fixed voltage, and the second terminal is connected to the control terminal G of the driving module 120. The driving module 120 is used for driving the light emitting module 130 to emit light according to the voltage of the control terminal G during the light emitting period.

The first switch module 30 is connected between the second terminal of the memory module 110 in the first pixel circuit 10 and the second terminal of the memory module 110 in the second pixel circuit 20, and is configured to be turned on during a light emitting period in a preset low frequency display mode to connect the memory module 110 in the first pixel circuit 10 and the memory module 110 in the second pixel circuit 20 in parallel.

The light emitting phases 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 disposed adjacent to each other and/or the light emitting color of the light emitting module 130 in the first pixel circuit 10 and the second pixel circuit 20 is the same.

Specifically, the structures of the first pixel circuit 10 and the second pixel circuit 20 may be the same. The driving module 120 and the light emitting module 130 are connected in series between a first power line ELVDD and a second power line ELVSS, the first power line ELVDD is connected to a first power voltage, the second power line ELVSS is connected to a second power voltage, the first power voltage is a positive voltage, and the second power voltage is a negative voltage or 0V. The first terminal of the memory module 110 may be connected to any fixed voltage, and the first power voltage connected to the first power line ELVDD is taken as an example in each embodiment of the present invention.

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 the Data voltage Data, a second end of the Data writing module 140 is connected to the driving module 120, and the Data writing module 140 is configured to write the Data voltage Data into the driving module 120 in the Data writing phase. The second end of the Data writing module 140 may be connected to the control end G of the driving module 120, so as to write the Data voltage Data to the control end G of the driving module 120 in the Data writing phase through the Data writing module 140.

The preset low-frequency display mode is a display mode with a lower refresh frequency, and the preset low-frequency display mode can be set to be a display mode with a refresh frequency lower than the preset frequency, and the preset frequency is a lower refresh frequency. For example, the preset frequency may be less than or equal to 60Hz, when the preset frequency is 60Hz, the preset low-frequency display mode is a display mode with a refresh frequency lower than 60Hz, when the preset frequency is 40Hz, the preset low-frequency display mode is a display mode with a refresh frequency lower than 40Hz, and when the preset frequency is 20Hz, the preset low-frequency display mode is a display mode with a refresh frequency lower than 20 Hz. The preset frequency may also be set to other low-frequency values according to requirements, which is not limited in this embodiment. Optionally, the preset low frequency Display mode includes an Always On Display (AOD) mode.

In one embodiment, the light emitting phases of the first pixel circuit 10 and the second pixel circuit 20 may be set to be the same, that is, the first pixel circuit 10 and the second pixel circuit 20 simultaneously drive the light emitting module 130 corresponding to each other to emit light, and the first pixel circuit 10 is disposed adjacent to the second pixel circuit 20, that is, the first pixel circuit 10 and the second pixel circuit 20 are disposed adjacent to each other in the arrangement direction thereof. Fig. 1 shows a case where the first pixel circuit 10 and the second pixel circuit 20 are located in the same column and are disposed in close proximity to each other. In other embodiments, the first pixel circuit 10 and the second pixel circuit 20 may be located in the same row, and they are disposed in close proximity.

In another embodiment, the light emitting phases of the first pixel circuit 10 and the second pixel circuit 20 may be set to be the same, and the light emitting color of the light emitting module 130 in the first pixel circuit 10 and the second pixel circuit 20 is 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 may be the same red light emitting module, the same green light emitting module, or the same blue light emitting module.

In other embodiments, the light emitting phases of the first pixel circuit 10 and the second pixel circuit 20 may be set to be the same, the first pixel circuit 10 is disposed adjacent to the second pixel circuit 20, 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.

Illustratively, the operation phases of the first pixel circuit 10 and the second pixel circuit 20 include at least a data writing phase and a light emitting phase. In a data writing phase in a normal display mode (i.e. a display mode other than a preset low-frequency display mode): the first switching module 30 is controlled to be turned off to disconnect the memory module 110 in the first pixel circuit 10 and the memory module 110 in the second pixel circuit 20. The Data writing module 140 in the first pixel circuit 10 and the second pixel circuit 20 is controlled to be turned on, so that the corresponding Data voltage Data is written 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 stored through the storage module 110 in the first pixel circuit 10, and simultaneously, the corresponding Data voltage Data is written 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 stored through the storage module 110 in the second pixel circuit 20.

A light emission writing stage in a normal display mode (i.e., a display mode other than a preset low frequency display mode): the first switching module 30 is controlled to be turned off to disconnect the memory module 110 in the first pixel circuit 10 and the memory module 110 in the second pixel circuit 20. The discharge path between the first power line ELVDD and the second power line ELVSS in the first pixel circuit 10 is controlled to be turned on, so that the driving module 120 in the first pixel circuit 10 generates a driving current according to the Data voltage Data of its control terminal G to drive the light emitting module 130 in the first pixel circuit 10 to emit light. Meanwhile, the discharge path between the first power line ELVDD and the second power line ELVSS in the second pixel circuit 20 is controlled to be turned on, so that the driving module 120 in the second pixel circuit 20 generates a driving current according to the Data voltage Data of its control terminal G to drive the light emitting module 130 in the second pixel circuit 20 to emit light.

In the data writing stage under the preset low-frequency display mode: the first switching module 30 is controlled to be turned off to disconnect the memory module 110 in the first pixel circuit 10 and the memory module 110 in the second pixel circuit 20. The Data writing modules 140 in the first pixel circuit 10 and the second pixel circuit 20 are controlled to be turned on, so that the Data writing modules 140 in the first pixel circuit 10 and the second pixel circuit 20 respectively write the corresponding Data voltages Data into the control terminals G of the corresponding driving modules 120, and the storage modules 110 in the first pixel circuit 10 and the second pixel circuit 20 respectively store the corresponding Data voltages Data. Since the memory modules 110 in the first pixel circuit 10 and the second pixel circuit 20 are independent of each other, the data voltage writing of the first pixel circuit 10 and the second pixel circuit 20 is not affected by each other, which helps to ensure the charging rate of the memory modules 110 of the first pixel circuit 10 and the second pixel circuit 20.

In the light emitting stage under the preset low-frequency display mode: the first switching module 30 is controlled to be turned on to connect the memory module 110 in the first pixel circuit 10 and the memory module 110 in the second pixel circuit 20 in parallel. The driving modules 120 in the first pixel circuit 10 and the second pixel circuit 20 are controlled to generate driving currents according to the Data voltage Data of their own control terminals G, respectively, so as to simultaneously drive the corresponding light emitting modules 130 to emit light. 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 connected to the two memory modules 110 connected in parallel (i.e., the memory module 110 in the first pixel circuit 10 and the memory module 110 in the second pixel circuit 20). The storage module 110 may include a storage capacitor, and the total capacitance of the two storage modules 110 connected in parallel is the sum of the capacitance of the two storage modules 110, so that the overall voltage storage capacity of the two storage modules 110 connected in parallel is increased, the voltage holding capacity of the control terminal G of the driving module 120 is improved, the display brightness attenuation of the light emitting module 130 at the light emitting stage is facilitated to be alleviated, the flicker problem of the display panel is alleviated, and the display effect is improved.

According to the technical scheme of the embodiment of the invention, in the light emitting stage in the preset low-frequency display mode, the storage modules in the first pixel circuit and the second pixel circuit can be connected in parallel by controlling the conduction of the first switch module, so that the control ends of the driving modules in the first pixel circuit and the second pixel circuit are both connected with the two storage modules which are connected in parallel, and the overall voltage storage capacity of the two storage modules which are connected in parallel is increased, thereby improving the voltage holding capacity of the control end of the driving module, being beneficial to relieving the electric leakage problem of the control end of the driving module, relieving the display brightness attenuation of the light emitting module in the light emitting stage in the preset low-frequency display mode, relieving the flicker problem of the display panel and improving the display effect. In addition, in a data writing stage and a normal display mode in a preset low-frequency display mode, the connection of the storage modules in the first pixel circuit and the second pixel circuit can be disconnected by controlling the first switch module to be turned off, so that the storage modules in the first pixel circuit and the second pixel circuit are mutually independent, the data voltage writing processes of the first pixel circuit and the second pixel circuit are not influenced by each other, and the charging rate of the storage modules in the first pixel circuit and the second pixel circuit is favorably ensured.

Fig. 2 is a schematic structural diagram of another first pixel circuit, a second pixel circuit and a first switch module according to an embodiment of the present invention. Referring to fig. 2, optionally, the first and

second pixel circuits

10 and 20 further include a light emission control module 150, the driving module 120 and the light emission module 130 are connected between a first power line ELVDD and a second power line ELVSS, and the control terminals of the light emission control modules 150 in the first and

second pixel circuits

10 and 20 are connected to the same light emission control signal EM for being turned on or off in response to the light emission control signal EM to make the light emission phases of the first and

second pixel circuits

10 and 20 the same.

With continued reference to fig. 2, further, the preset low-frequency display mode includes a message screen display mode, and the display panel further includes a message screen control signal line. The first switching module 30 includes a first switching unit 310 and a second switching unit 320. The control terminal of the first switch unit 310 is connected to the touch screen control signal line, the first terminal of the first switch unit 310 is connected to the control terminals of the light-emitting control modules 150 in the first pixel circuit 10 and the second pixel circuit 20, the second terminal of the first switch unit 310 is connected to the control terminal of the second switch unit 320, and the first switch unit 310 is configured to be turned on in the touch screen display mode in response to a signal on the touch screen control signal line, so as to write the light-emitting control signal EM into the control terminal of the second switch unit 320. The second switch unit 320 is connected between the second terminal of the memory module 110 in the first pixel circuit 10 and the second terminal of the memory module 110 in the second pixel circuit 20, and is configured to be turned on in response to the light-emitting control signal EM during the light-emitting period in the information screen display mode, so as to connect the memory module 110 in the first pixel circuit 10 and the memory module 110 in the second pixel circuit 20 in parallel.

Specifically, the screen-off control signal line is connected to a screen-off control signal AOD, and the screen-off control signal AOD includes an on level signal and an off level signal. When the screen-off control signal AOD is a conduction level signal, the display panel operates in a screen-off display mode, and the current screen-off control signal AOD can control the first switch unit 310 to be turned on; when the screen-off control signal AOD is an off-level signal, the display panel operates in a non-screen-off display mode (e.g., a normal display mode), and the current screen-off control signal AOD can control the first switch unit 310 to be turned off.

Illustratively, in the light emitting stage in the touch screen display mode, the touch screen control signal AOD and the light emitting control signal EM are both on level signals, the light emitting control module 150 in the first pixel circuit 10 and the second pixel circuit 20 is turned on in response to the light emitting control signal EM, so as to turn on the discharge path between the first power line ELVDD and the second power line ELVSS, and the driving module 120 generates the driving current according to the Data voltage Data of its own control terminal G to drive the light emitting module 130 in the first pixel circuit 10 to emit light. Meanwhile, the first switch unit 310 is turned on in response to the information screen control signal AOD, and writes the emission control signal EM to the control terminal of the second switch unit 320, and the second switch unit 320 is turned on in response to the emission control signal EM to connect the memory module 110 in the first pixel circuit 10 and the memory module 110 in the second pixel circuit 20 in parallel, thereby improving the voltage holding capability of the control terminal G of the driving module 120 in the first pixel circuit 10 and the second pixel circuit 20 in the information screen display mode.

In the normal display mode, the blanking control signal AOD is an off level signal, the first switch unit 310 is turned off in response to the blanking control signal AOD, the control terminal of the second switch unit 320 does not receive a signal, and the second switch unit 320 remains turned off to disconnect the storage module 110 in the first pixel circuit 10 and the storage module 110 in the second pixel circuit 20, so that the storage modules 110 in the first pixel circuit 10 and the second pixel circuit 20 are independent of each other.

With continued reference to fig. 2, further, the first switching unit 310 includes a first transistor T1, and the second switching unit 320 includes a second transistor T2. A gate of the first transistor T1 is connected to the information screen control signal line, a first electrode of the first transistor T1 is connected to the control terminals of the light-emitting control module 150 in the first pixel circuit 10 and the second pixel circuit 20, and a second electrode of the first transistor T1 is connected to a gate of the second transistor T2. A first pole of the second transistor T2 is connected to the second terminal of the memory module 110 in the first pixel circuit 10, and a second pole of the second transistor T2 is connected to the second terminal of the memory module 110 in the second pixel circuit 20. The light emission control module 150 includes a third transistor T3, the third transistor T3 is connected between the first power line ELVDD and the second power line ELVSS, a gate of the third transistor T3 is connected to the light emission control signal EM, a first pole of the first transistor T1 is connected to a gate of the third transistor T3, and the second transistor T2 and the third transistor T3 are of the same type. Further, the light emitting control module 150 may further include a fourth transistor T4, the fourth transistor T4 is connected between the first power line ELVDD and the second power line ELVSS, a gate of the fourth transistor T4 is connected to the light emitting control signal EM, and the third transistor T3 and the fourth transistor T4 are of the same type.

The first to fourth transistors T1 to T4 may be 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 shown in fig. 2). When the second transistor T2 is an N-type transistor, the third transistor T3 and the fourth transistor T4 are also N-type transistors.

With continued reference to fig. 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 terminal of the initialization module 160 is connected to the initialization voltage Vref, the second terminal 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 in an initialization stage. The first terminal of the Data writing module 140 is connected to the Data voltage Data, and the second terminal of the Data writing module 140 is connected to the first terminal of the driving module 120. The threshold compensation module 170 is connected between the second terminal of the driving module 120 and the control terminal G, and is used for compensating the threshold voltage of the driving module 120.

In the technical solution of the embodiment of the present invention, in the light emitting stage in the display mode of the touchscreen, the storage module 110 in the first pixel circuit 10 and the storage module 110 in the second pixel circuit 20 are connected in parallel, so that 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 storage modules 110 connected in parallel, and the overall voltage storage capability of the two storage modules 110 connected in parallel is increased, thereby improving the voltage holding capability of the control terminal G of the driving module 120. Because there is a voltage difference between the voltage of the control terminal G of the driving module 120 and the initialization voltage Vref accessed by the first terminal of the initialization module 160, the scheme is favorable for avoiding a leakage path from the control terminal G of the driving module 120 to the first terminal of the initialization module 160 and a leakage path from the second terminal of the driving module 120, the threshold compensation module 170 to the control terminal G of the driving module 120 by improving the voltage holding capability of the control terminal G of the driving module 120, thereby alleviating a flicker problem caused by leakage and being favorable for improving the display effect.

With continued reference to fig. 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 line ELVDD and a second power line ELVSS, a first pole of the storage capacitor Cst is connected to a fixed voltage (e.g., a first power voltage on the first power line ELVDD), a second pole of the storage capacitor Cst is connected to a gate electrode of the driving transistor DT, and the first switching module 30 is connected between a second pole of the storage capacitor Cst in the first pixel circuit 10 and a second pole of the storage capacitor Cst in 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 the second Scan signal Scan2, a first pole of the fifth transistor T5 is connected to the Data voltage Data, and a second pole of the fifth transistor T5 is connected to the driving module 120. When the second terminal of the data writing module 140 is connected to the first terminal of the driving module 120, the second terminal of the fifth transistor T5 is connected to the first terminal of the driving module 120 (as shown in fig. 2). When the second terminal of the data writing module 140 is connected to the 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 the first Scan signal Scan1, a first pole of the sixth transistor T6 is connected to the 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 the second Scan signal Scan2, a first pole of the seventh transistor T7 is connected to the second terminal 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.

Each transistor in the first pixel circuit 10, the second pixel circuit 20 and the first switch module 30 may be a P-type transistor or an N-type transistor, and fig. 2 schematically illustrates a case where each transistor in the first pixel circuit 10, the second pixel circuit 20 and the first switch 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-scale Light-Emitting Diode (Micro-LED), and the like.

Fig. 3 is a driving timing chart for driving the first pixel circuit 10, the second pixel circuit 20 and the first switch module 30 in fig. 2 according to an embodiment of the present invention. In the following description, referring to fig. 2 and fig. 3, the transistors in the first pixel circuit 10, the second pixel circuit 20, and the first switch module 30 are all P-type transistors, and the preset low frequency display mode includes a screen display mode.

Illustratively, the operation 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 t 3. In the screen display mode, the screen display signal AOD is a low level signal.

In the initialization period t1 in the screen display mode, the first Scan signal Scan is a low level signal, and the second Scan signal Scan2 and the 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 the other transistors are turned off. The initialization voltage Vref is written to the gate of the driving transistor DT through the sixth transistor T6, initializes the gate voltage of the driving transistor DT, and controls the driving transistor DT to be turned on.

In the data writing phase t2 in the screen display mode, the second Scan signal Scan2 is a low level signal, and the first Scan signal Scan and the emission control signal EM are high level signals. The first transistor T1 remains on, and the second transistor T2 remains 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 the other transistors are turned off. The Data voltage Data is written to the gate of the driving transistor DT sequentially 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 voltages Data, and 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 are not affected by each other, which is helpful for ensuring the charging rates of the storage capacitors Cst in the first pixel circuit 10 and the second pixel circuit 20.

In the light emission period t3 in the screen display mode, the light emission 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 to connect the storage capacitor Cst in the first pixel circuit 10 and the storage capacitor Cst in the second pixel circuit 20 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, a discharge path between the first power line ELVDD and the second power line ELVSS is turned on, and 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 after being connected in parallel (i.e. the storage capacitors Cst in the first pixel circuit 10 and the storage capacitors Cst in the second pixel circuit 20), and the total capacitance value of the two storage capacitors Cst after being 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 after being connected in parallel is increased, thereby improving the gate voltage retention capacity of the driving transistor DT, helping to prevent a leakage path from being formed between the gate of the driving transistor DT and the first electrode of the sixth transistor T6, and avoiding a leakage path from being formed between the second electrode of the driving transistor DT and the gate of the seventh transistor T7 and the driving transistor DT, thereby alleviating the problem of flicker caused by leakage current, and helping to improve the display effect.

Fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention, where specific structures of the first pixel circuit 10 and the second pixel circuit 20 and a connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 may be the same as the specific structures of the first pixel circuit 10 and second pixel circuit 20 shown in fig. 2 and a connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20. In other embodiments, specific structures of the first pixel circuit 10 and the second pixel circuit 20 in the display panel and a connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 may also be the same as those shown in fig. 1, 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 may also be set with reference to the above embodiments, which is not specifically limited in this embodiment.

With reference to fig. 2 and 4, further, the first pixel circuits 10 and the second pixel circuits 20 are arranged in an array in the display panel, and the first pixel circuits 10 in a row and the second pixel circuits 20 in a row are alternately arranged. The light emitting phases of the second pixel circuits 20 in one row and the first pixel circuits 10 in the previous row are the same, and the second end of the memory module 110 of the second pixel circuit 20 in one column and the second end of the memory module 110 of the previous first pixel circuit 10 are connected through the first switch module 30.

Specifically, the display panel may include a plurality of rows of pixel circuits, in which a row of first pixel circuits 10, a row of second pixel circuits 20, a row of first pixel circuits 10, and a row of second pixel circuits 20 … … are sequentially arranged according to the above rule. Illustratively, when the total number of rows of the first pixel circuit 10 and the second pixel circuit 20 in the display panel is 2n, the i-th row is the first pixel circuit 10, the i + 1-th row is the

second pixel circuit

20, and 1 ≦ i ≦ 2 n-1. The light emitting phases of the pixel circuits in the (i + 1) th row (i.e. the second pixel circuit 20) and the pixel circuits in the (i) th row (i.e. the first pixel circuit 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 connected to the pixel circuits in the (i) th row and the (i + 1) th row are the same, so that the light emitting modules 130 in the pixel circuits in the (i) th row and the (i + 1) th row emit light at the same time. Accordingly, the total number of the first pixel circuits 10 and the second pixel circuits 20 in each column of the display panel is 2n, wherein the ith pixel circuit is the first pixel circuit 10, the (i + 1) th pixel circuit is the second pixel circuit 20, and the second end of the memory module 110 of the (i + 1) th pixel circuit (i.e., the second pixel circuit 20) in each column and the second end of the memory module 110 of the ith pixel circuit (i.e., the first pixel circuit 10) are connected through the corresponding first switch module 30. According to the technical scheme of the embodiment, the light emitting modules 130 in the pixel circuits of the ith row and the (i + 1) th row can be driven to emit light at the same time, and in the light emitting stage under 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 ith row and the (i + 1) th row can be connected in parallel, so that the voltage holding capacity of the control end G of the driving module 120 is improved, the electric leakage problem of the control end G of the driving module 120 is favorably relieved, the display brightness attenuation of the light emitting modules 130 in the light emitting stage is relieved, the flicker problem of the display panel is relieved, and the display effect is improved.

With reference to fig. 2 and 4, on the basis of the above-described embodiments, optionally, the first pixel circuit 10 and the second pixel circuit 20 in the same column are disposed adjacent to each other. For example, when the first pixel circuit 10, the second pixel circuit 20, the first pixel circuit 10, and the second pixel circuit 20 … … in one row of the display panel are sequentially arranged adjacently according to the rule, the first pixel circuit 10 and the second pixel circuit 20 in each column are arranged adjacently, so that the light emitting modules 130 in the first pixel circuit 10 and the second pixel circuit 20 in two adjacent rows can be simultaneously driven to emit light, and in the light emitting stage in the preset low frequency display mode, the two upper and lower first pixel circuits 10 and the two lower second pixel circuits 20 in each column of the first pixel circuit 10 and the second pixel circuit 20 in two adjacent rows can be connected in parallel, so as to improve the voltage holding capability of the control terminal G of the driving module 120, help 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 alleviating the flicker problem of the display panel, and the display effect is improved.

Fig. 4 only shows a case where the first pixel circuit 10 and the second pixel circuit 20 in the same column are disposed adjacently, and in other embodiments, the first pixel circuit 10 and the second pixel circuit 20 in the same column may be further spaced by other pixel circuits, that is, the first pixel circuit 10 in one row and the second pixel circuit 20 in one row may be further spaced by other pixel circuit rows.

In conjunction with fig. 2 and 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 light emitting modules 130 in the first pixel circuit 10 and the second pixel circuit 20 in the same column emit light of the same color, which means 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 are both green light emitting devices, or are both blue light emitting devices, and when the light emitting device D1 further includes a light emitting device of another color such as white, the light emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 in the same column may also be light emitting devices of another color. According to the technical scheme of the embodiment, the light emitting devices D1 in the pixel circuits of the ith row and the (i + 1) th row can be driven to emit light at the same time, and in the light emitting stage in the preset low-frequency display mode, the storage modules 110 of the pixel circuits, which have the same light emitting color, of the upper light emitting device D1 and the lower light emitting device D1 in each column of the pixel circuits of the ith row and the (i + 1) th row can be connected in parallel, so that the voltage holding capability of the control terminal G of the driving module 120 is improved, the problem of electric leakage of the control terminal G of the driving module 120 is favorably solved, the display brightness attenuation of the light emitting module 130 in the light emitting stage is alleviated, the flicker problem of the display panel is reduced, and the display effect is improved.

With reference to fig. 2 and 4, as a preferred embodiment of the present invention, the first pixel circuit 10 and the second pixel circuit 20 in the same column may be disposed adjacently, and the light emitting colors of the light emitting modules 130 disposed in the first pixel circuit 10 and the second pixel circuit 20 in the same column are the same. In this way, the light emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 in two adjacent rows can be driven to emit light at the same time, and in the light emitting phase in the preset low frequency display mode, the first pixel circuit 10 and the second pixel circuit 20 with the same light emitting color of the upper and lower light emitting devices D1 in each column in the first pixel circuit 10 and the second pixel circuit 20 in two adjacent rows can be connected in parallel, so that the light emitting color and the light emitting brightness of the upper and lower light emitting devices D1 in each column in the first pixel circuit 10 and the second pixel circuit 20 in two adjacent rows are the same, which is equivalent to halving the sub-pixel density (Pixels Per inc, PPI) in the preset low frequency display mode, and simultaneously, the voltage holding capability of the control terminal G of the driving module 120 is improved, which is helpful for alleviating the problem of leakage of the control terminal G of the driving module 120, and alleviating the display brightness decay of the light emitting module 130 in the light emitting phase, therefore, the flicker problem of the display panel is reduced, and the display effect is improved.

In order to verify the beneficial effects of the embodiments of the present invention, the inventor has performed simulation experiments on the existing display panel and the display panel in the above embodiments, and through experiments, the light emitting device in the pixel circuit of the existing display panel has a driving current change rate of about 2.4% in one frame in the information screen display mode. In the technical solution of the above embodiment, the light emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 in two adjacent rows are driven to emit light at the same time, and in the light emitting stage in the display mode of the information screen, after the first pixel circuit 10 and the second pixel circuit 20 in which the light emitting colors 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 two adjacent rows are connected in parallel, the variation rate of the driving current of the light emitting device D1 in one frame is about 1.3%. Compared with the prior art, the technical scheme of the embodiment can reduce the change rate of the driving current of the light-emitting device D1 in one frame by about 1.1%, so that the scheme is favorable for relieving the display brightness attenuation of the light-emitting device D1 in the light-emitting stage in the information screen display mode, thereby reducing the flicker problem of the display panel and improving the display effect.

Fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention, in which specific structures of the first pixel circuit 10 and the second pixel circuit 20 and a connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 may be the same as the specific structures of the first pixel circuit 10 and second pixel circuit 20 shown in fig. 2 and a connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20. In other embodiments, specific structures of the first pixel circuit 10 and the second pixel circuit 20 in the display panel and a connection relationship between the first switch module 30 and the corresponding first pixel circuit 10 and second pixel circuit 20 may also be the same as those shown in fig. 1, 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 may also be set with reference to the above embodiments, which is not specifically limited in this embodiment.

With reference to fig. 2 and fig. 5, on the basis of the foregoing embodiments, optionally, the light emitting module 130 at least includes a first light emitting module, a second light emitting module, and a third light emitting module, where a column includes the first pixel circuit 10 and the second pixel circuit 20 of the first light emitting module, a column includes the first pixel circuit 10 and the second pixel circuit 20 of the second light emitting module, and a column includes the first pixel circuit 10 and the second pixel circuit 20 of the third light emitting module, which are alternately arranged in the display panel. The display panel further includes a second switch module 40, a first end of the second switch module 40 is connected to a second end of the memory module 110 of one second pixel circuit 20 in one row, a second end of the second switch module 40 is connected to a second end of the memory module 110 of the next light emitting module 130 in the same row, which has the same light emitting color, and the second switch module 40 is configured to be turned on at a light emitting stage in a preset low frequency display mode to connect the memory modules 110 in the corresponding second pixel circuits 20 in parallel.

Illustratively, 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 an example that the display panel includes 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, 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, and j is greater than or equal to 1 and less than or equal to 3m-2, so that each column of light emitting devices D1 in the display panel presents a form that 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, and one column of blue light emitting devices … … are sequentially arranged according to the rule.

With reference to fig. 2 and 5, the light emitting devices D1 in the first pixel circuit 10 and the second pixel circuit 20 of the 1 st column and the 4 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 of the 2 nd column and the 5 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 of the 3 rd column and the 6 th column are both blue light emitting devices. The second terminal of the memory block 110 of the second pixel circuit 20 of row 2, column 1 and the second terminal of the memory block 110 of the second pixel circuit 20 of row 2, column 4 are connected through a second switch module 40. The second terminal of the memory block 110 of the second pixel circuit 20 of row 2, column 2 and the second terminal of the memory block 110 of the second pixel circuit 20 of row 2, column 5 are connected through a second switch module 40. The second terminal of the memory block 110 of the second pixel circuit 20 of row 2, column 3 and the second terminal of the memory block 110 of the second pixel circuit 20 of row 2, column 6 are connected through a second switch module 40. In a light emitting stage in the preset low frequency display mode, by controlling the first switch module 30 and the second switch module 40 to be turned on, the first pixel circuit 10 and the second pixel circuit 20 in the 1 st column and the four memory modules 110 in the first pixel circuit 10 and the second pixel circuit 20 in the 4 th column can be connected in parallel, the first pixel circuit 10 and the second pixel circuit 20 in the 2 nd column and the first pixel circuit 10 and the four memory modules 110 in the second pixel circuit 20 in the 5 th column can be connected in parallel, and the first pixel circuit 10 and the second pixel circuit 20 in the 3 rd column and the four memory modules 110 in the first pixel circuit 10 and the second pixel circuit 20 in the 6 th column can be connected in parallel. In the light emitting stage of the preset low frequency display mode, the memory modules 110 in the four pixel circuits with the same light emitting color of the two columns of light emitting devices D1 in the second pixel circuit 20 in one row and the first pixel circuit 10 in the previous row are connected in parallel, 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 memory modules 110 connected in parallel, and when the capacitance values in the respective memory modules 110 are equal, the total capacitance value of the four memory modules 110 connected in parallel is four times that of the capacitance value in one memory module 110, which is equivalent to increasing the voltage holding capability of the control terminal of the driving module 120 of each pixel circuit, thereby helping to alleviate the leakage problem of the control terminal of the driving module, and alleviating the display brightness attenuation of the light emitting module in the light emitting stage of the preset low frequency display mode, and alleviating the flicker problem of the display panel, and the display effect is improved.

The second switch module 40 may be controlled to be turned off during other phases (e.g., an initialization phase, a data writing phase and a normal display phase) except for the light emitting phase in the preset low frequency display mode, so that the memory module 110 in the corresponding second pixel circuit 20 is kept independent.

With reference to fig. 2 and fig. 5, further, the second switch module 40 includes a third switch unit 410 and a fourth switch unit 420, a control terminal of the third switch unit 410 is connected to the osd control signal line, a first terminal of the third switch unit 410 is connected to the light-emitting control signal EM that is connected to the light-emitting control module 150 in the corresponding row of the second pixel circuits 20, a second terminal of the third switch unit 410 is connected to a control terminal of the fourth switch unit 420, and the third switch unit 410 is configured to be turned on in the osd mode in response to the osd control signal AOD on the osd control signal line, so as to write the light-emitting control signal EM into the control terminal of the fourth switch unit 420. A first terminal of the fourth switching unit 420 is connected to a second terminal of the memory module 110 of one second pixel circuit 20 in one row, a second terminal of the fourth switching unit 420 is connected to a second terminal of the memory module 110 of the second pixel circuit 20 with the same light-emitting color of the next light-emitting module 130 in the same row, and the fourth switching unit 420 is configured to respond to the light-emitting control signal EM to be turned on in the light-emitting stage in the screen display mode so as to connect the memory modules 110 in the corresponding second pixel circuits 20 in parallel.

With reference to fig. 2 and 5, further, the third switching unit 410 includes an eighth transistor T8, and the fourth switching unit 420 includes a ninth transistor T9. A gate of the eighth transistor T8 is connected to the information screen control signal line, a first electrode of the eighth transistor T8 is connected to the light-emission control signal EM that is connected to the light-emission control module 150 in the corresponding row of the second pixel circuit 20, and a second electrode of the eighth transistor T8 is connected to a gate of the ninth transistor T9. The first pole of the ninth transistor T9 is connected to the second terminal of the memory module 110 of one second pixel circuit 20 in one row, and the second pole of the ninth transistor T9 is connected to the second terminal of the memory module 110 of the second pixel circuit 20 emitting light of the same color as the next light-emitting module 130 in the same row. The eighth transistor T8 and the ninth transistor T9 may be 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.

On the basis of the above embodiments, the display panel includes a substrate, and a light-shielding layer, an active layer, and a plurality of metal layers sequentially disposed 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 information screen control signal line is disposed in the same layer as at least one of the light shielding layer and the multi-layer metal layer.

Illustratively, the substrate may provide cushioning, protection, or support for the display panel. The light shielding layer is positioned between the substrate and the active layer and used for shielding light. The multi-layer metal layer comprises a first metal layer, a second metal layer, a third metal layer and a fourth metal layer which are sequentially positioned on one side of the substrate far away from the active layer. The gates of the transistors and the first plates of the storage capacitors in the first pixel circuit 10 and the second pixel circuit 20 are located in the first metal layer, the second plates of the storage capacitors are located in the second metal layer, and the sources and the drains of the transistors are located in the third metal layer. The screen-contacted control signal line can be arranged on the same layer with 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, and can also be jumped to the first metal layer or the second metal layer in the lower frame area of the display panel to be connected with the corresponding signal pad.

The embodiment of the invention also provides a display device which can be a mobile phone, a computer or a tablet computer and the like. The display device comprises the display panel in any embodiment, so that the display device has the corresponding structure and the beneficial effects of the display panel, and the description is omitted.

The embodiment of the invention also provides a driving method of the display panel, which is used for driving the display panel in any embodiment to work. Fig. 6 is a flowchart illustrating a driving method of a display panel according to an embodiment of the present invention. Referring to fig. 6, the method specifically includes the following steps:

and S110, controlling the first switch module to be conducted in a light-emitting stage under a preset low-frequency display mode so as to connect the storage module in the first pixel circuit and the storage module in the second pixel circuit in parallel.

And S120, controlling the first switch module to be switched off at other stages except for the light-emitting stage in the preset low-frequency display mode so as to disconnect the storage module in the first pixel circuit and the storage module in the second pixel circuit.

On the basis of the foregoing embodiment, optionally, step S110 specifically includes:

controlling the first switch unit to respond to a signal on the information screen control signal line to be conducted in an information screen display mode so as to write a light-emitting control signal into a control end of the second switch unit; the second switch unit responds to the light-emitting control signal and is conducted in the light-emitting stage in the information screen display mode so as to be connected with the storage module in the first pixel circuit and the storage module in the second pixel circuit in parallel.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, comprising:

2. The display panel according to claim 1, wherein the preset low frequency display mode comprises a message screen display mode; the first pixel circuit and the second pixel circuit further comprise a light emitting control module, the driving module and the light emitting module are connected between a first power line and a second power 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 used for responding to the light emitting control signal to be switched on or switched off;

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;

4. The display panel according to claim 1, wherein the driving module includes a driving transistor, the memory module includes a storage capacitor, and the light emitting module includes a light emitting device;

5. The display panel according to claim 1, wherein the first pixel circuits and the second pixel circuits are arranged in an array in the display panel, and a row of the first pixel circuits and a row of the second pixel circuits are alternately arranged;

6. The display panel according to claim 5, wherein the first pixel circuit and the second pixel circuit in the same column are adjacently disposed; and/or the light emitting modules in the first pixel circuit and the second pixel circuit in the same column emit light with the same color.

7. The display panel according to claim 5, wherein the light emitting modules include at least first, second, and third light emitting modules that emit light of different colors, one column including the first and second pixel circuits of the first light emitting module, one column including the first and second pixel circuits of the second light emitting module, and one column including the first and second pixel circuits of the third light emitting module are alternately arranged in the display panel;

8. A driving method of a display panel, the display panel comprising: the pixel circuit comprises a first pixel circuit, a second pixel circuit and a first switch module; the first pixel circuit and the second pixel circuit respectively comprise a storage module, a driving module and a light-emitting module; the first end of the storage module is connected with a fixed voltage, and the second end of the storage module is connected with the control end of the driving module; the driving module is used for driving the light-emitting module to emit light according to the voltage of the control end of the driving module at the light-emitting stage; a second terminal of the memory block in the first pixel circuit and a second terminal of the memory block in the second pixel circuit;

the driving method of the display panel includes:

9. The method according to claim 8, wherein the preset low-frequency display mode comprises a message screen display mode; the first pixel circuit and the second pixel circuit further comprise a light emitting control module, the driving module and the light emitting module are connected between a first power line and a second power 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 used for responding to the light emitting control signal to be switched on or switched off; the display panel also comprises a screen turning control signal line, and the first switch module comprises a first switch unit and a second switch unit; the control end of the first switch unit is connected with the screen-off control signal line, the first end of the first switch unit is connected with the control ends of the light-emitting control modules in the first pixel circuit and the second pixel circuit, and the second end of the first switch unit is connected with the control end of the second switch unit; the second switching unit is connected between a second terminal of the memory module in the first pixel circuit and a second terminal of the memory module in the second pixel circuit;

the driving method of the display panel includes:

10. A display device characterized by comprising the display panel according to any one of claims 1 to 7.