Display panel, driving method thereof and display device

Abstract

The application provides a display panel, a driving method thereof and a display device. In the process of switching from a first working frequency to a second working frequency, the time-energy duration of a data control signal in a brightness transition stage is set to be different from the time-energy duration in a first brightness stage and a second brightness stage. Thus, under the same gray scale condition, the brightness of the display panel in the brightness transition stage is between the brightness in the first brightness stage and the brightness in the second brightness stage, so that the brightness can be smoothly transitioned in the process of switching from the first working frequency to the second working frequency, the problem of brightness mutation is avoided, the flickering phenomenon of the display panel is avoided, and the visual experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, more particularly, to a display panel, a driving method thereof and a display device. BACKGROUND

[0002] The display panel adopts different working frequencies for display in different application scenarios, that is, the number of display frames of the display panel under different working frequencies is different; for example, a high working frequency driving mode is adopted to drive display of dynamic pictures (such as sports events or game scenes) to ensure the smoothness of the display pictures; a low working frequency driving mode is adopted to drive display of slow-motion images or static pictures to reduce power consumption. However, when the display panel switches from a high working frequency to a low working frequency, and when it switches from a low working frequency to a high working frequency, a problem of display brightness mutation will occur during the switching, that is, screen flickering will occur, affecting the visual experience. SUMMARY

[0003] Therefore, the present application provides a display panel, a driving method thereof and a display device, which effectively solve the related problems in the prior art, and can smoothly transition the brightness during the process of switching the display panel from a first working frequency to a second working frequency, avoid the problem of brightness mutation, avoid the flickering phenomenon of the display panel, and improve the visual experience.

[0004] To achieve the above object, the technical scheme provided by the present application is as follows:

[0005] A display panel, comprising a first working frequency and a second working frequency, and the display panel comprises a plurality of display frames, the display frame comprising a write display frame; under the condition of the first working frequency and the second working frequency, the number of write display frames of the display panel in the same time is different; the display panel comprises a pixel circuit, the pixel circuit comprising a data write module, for enabling the data write module to write data voltage into the pixel circuit when the write display frame responds to the data control signal;

[0006] In the process of switching the display panel from the first working frequency to the second working frequency, a first brightness stage, a brightness transition stage and a second brightness stage are sequentially performed; the enabling duration of the data control signal is the same in the first brightness stage and the second brightness stage, and the enabling duration of the data control signal in the brightness transition stage is different from the enabling duration in the first brightness stage and the second brightness stage, so that the brightness of the display panel in the brightness transition stage is between the brightness in the first brightness stage and the brightness in the second brightness stage under the same gray scale condition, wherein the brightness transition stage at least includes the last write display frame in the first working frequency and / or the initial write display frame in the second working frequency.

[0007] Correspondingly, the application further provides a driving method of a display panel, used for driving the display panel, and the driving method comprises:

[0008] In the process of switching the display panel from the first working frequency to the second working frequency, a first brightness stage, a brightness transition stage and a second brightness stage are sequentially performed; wherein,

[0009] The enabling duration of the data control signal is controlled to be the same in the first brightness stage and the second brightness stage;

[0010] The enabling duration of the data control signal is controlled to be different in the brightness transition stage from that in the first brightness stage and the second brightness stage, so that the brightness of the display panel in the brightness transition stage is between the brightness in the first brightness stage and the brightness in the second brightness stage under the same gray scale condition.

[0011] Correspondingly, the application further provides a display device, comprising the display panel.

[0012] Compared with the prior art, the technical scheme provided by the application has at least the following advantages:

[0013] The application provides a display panel, a driving method thereof and a display device, in the process of switching the display panel from a first working frequency to a second working frequency, the enabling duration of the data control signal in the brightness transition stage is set to be different from that in the first brightness stage and the second brightness stage, so that the brightness of the display panel in the brightness transition stage is between the brightness in the first brightness stage and the brightness in the second brightness stage under the same gray scale condition, so as to ensure that the brightness can be smoothly transitioned in the process of switching the display panel from the first working frequency to the second working frequency, avoid the problem of brightness mutation, avoid the flickering phenomenon of the display panel, and improve the visual experience. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description only constitute the embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on the provided drawings without creative labor.

[0015] Figure 1 A structural schematic diagram of a pixel circuit provided for the embodiments of the present application;

[0016] Figure 2 A timing diagram provided for the embodiments of the present application;

[0017] Figure 3 A timing diagram of a data control signal provided for the embodiments of the present application;

[0018] Figure 4 Another timing diagram of a data control signal provided for the embodiments of the present application;

[0019] Figure 5 Still another timing diagram of a data control signal provided for the embodiments of the present application;

[0020] Figure 6 Still another timing diagram of a data control signal provided for the embodiments of the present application;

[0021] Figure 7 Still another timing diagram of a data control signal provided for the embodiments of the present application;

[0022] Figure 8 Still another timing diagram of a data control signal provided for the embodiments of the present application;

[0023] Figure 9 Still another timing diagram of a data control signal provided for the embodiments of the present application;

[0024] Figure 10 Still another timing diagram of a data control signal provided for the embodiments of the present application;

[0025] Figure 11 A timing diagram of a light emitting control signal provided for the embodiments of the present application;

[0026] Figure 12 Another timing diagram of a light emitting control signal provided for the embodiments of the present application;

[0027] Figure 13 Still another timing diagram of a light emitting control signal provided for the embodiments of the present application;

[0028] Figure 14 A timing diagram of another light emission control signal provided for an embodiment of the present application;

[0029] Figure 15 A timing diagram of another light emission control signal provided for an embodiment of the present application;

[0030] Figure 16 A timing diagram of another light emission control signal provided for an embodiment of the present application;

[0031] Figure 17 A timing diagram of another light emission control signal provided for an embodiment of the present application;

[0032] Figure 18 A timing diagram of another light emission control signal provided for an embodiment of the present application;

[0033] Figure 19 A structural schematic diagram of another pixel circuit provided for an embodiment of the present application;

[0034] Figure 20 A timing diagram of a first sub-data control signal and a second sub-data control signal provided for an embodiment of the present application;

[0035] Figure 21 A structural schematic diagram of another pixel circuit provided for an embodiment of the present application;

[0036] Figure 22 A timing diagram of a first sub-light emission control signal and a second sub-light emission control signal provided for an embodiment of the present application;

[0037] Figure 23 A structural schematic diagram of a display device provided for an embodiment of the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work, fall within the protection scope of the present application.

[0039] As described in the background, when the display panel switches from a high working frequency to a low working frequency, and when it switches from a low working frequency to a high working frequency, a problem of display brightness mutation during the switching period will occur, that is, a screen flickering phenomenon will occur, which affects the visual experience.

[0040] Specifically, the display panel includes a plurality of display frames, and the display frame can be a write display frame or a hold display frame. Wherein, the display panel includes a write display frame and a hold display frame in one picture refresh period, the data voltage is written in the write display frame, and the data voltage written before the write display frame is maintained in the hold display frame, and no new data voltage is written until the new data voltage is written in the write display frame in the next picture refresh period. In one picture refresh period, the number of hold display frames of the display panel at low working frequency is greater than the number of hold display frames at high working frequency, that is, in the same time, the number of write display frames of the display panel at low working frequency is less than the number of write display frames at high working frequency. When the display panel writes data voltage in the write display frame, the initial brightness is relatively low, and the brightness increases with the increase of the hold display frame, so that in the same time, the average brightness of the display panel at low working frequency is greater than the average brightness at high working frequency. Therefore, due to the brightness difference between low working frequency and high working frequency, the display panel will have a problem of brightness mutation when the working frequency is switched, and the display panel will have a flicker phenomenon.

[0041] Therefore, the embodiment of the present application provides a display panel, a driving method thereof and a display device, which effectively solve the related problems in the prior art, can make the brightness transition smoothly, avoid the problem of brightness mutation, avoid the flicker phenomenon of the display panel, and improve the visual experience.

[0042] To achieve the above object, the technical scheme provided by the embodiment of the present application is as follows, which is specifically combined with Figures 1 to 23 The technical scheme provided by the embodiment of the present application is described in detail.

[0043] Combined with Figures 1 to 3 As shown in the figure, Figure 1 A structure diagram of a pixel circuit provided by the embodiment of the present application, Figure 2 A timing diagram provided by the embodiment of the present application, Figure 3 A timing diagram of a data control signal provided by the embodiment of the present application. Wherein, the display panel includes a first working frequency H1 and a second working frequency H2, and the display panel includes a plurality of display frames, the display frame includes a write display frame 11, and at least one hold display frame 12 after the write display frame 11. Under the condition of the first working frequency H1 and the second working frequency H2, the number of write display frames 11 of the display panel in the same time is different. The display panel includes a pixel circuit, and the pixel circuit includes a data writing module 100, which is used for writing data voltage Vdata into the pixel circuit when the write display frame 11 is enabled in response to the data control signal Sj.

[0044] In the process of switching the display panel from the first working frequency H1 to the second working frequency H2, a first brightness stage A1, a brightness transition stage Ax and a second brightness stage A2 are sequentially performed; the enable time L of the data control signal Sd in the first brightness stage A1 and the second brightness stage A2 is the same, and the enable time L' of the data control signal Sd in the brightness transition stage Ax is different from the enable time L in the first brightness stage A1 and the second brightness stage A2, so that under the same gray scale condition, the brightness of the display panel in the brightness transition stage Ax is between the brightness of the display panel in the first brightness stage A1 and the brightness of the display panel in the second brightness stage A2, wherein the brightness transition stage Ax at least includes the write display frame 11 at the end of the first working frequency H1 and / or the write display frame 11 at the beginning of the second working frequency H2.

[0045] Reference Figure 1 As shown in the figure, the pixel circuit provided by the embodiment of the present application further includes a driving transistor M0, a first reset transistor Mf1, a second reset transistor Mf2, a connecting transistor Mj, a storage capacitor C and a light-emitting control module 200. The first end of the first reset transistor Mf1 is connected to a reset voltage Vref, the second end of the first reset transistor Mf1 is electrically connected to the gate of the driving transistor M0, and the gate of the first reset transistor Mf1 is connected to a first reset control signal Sf1. The first end of the second reset transistor Mf2 is connected to the reset voltage Vref, the second end of the second reset transistor Mf2 is electrically connected to the anode of the light-emitting element D, the cathode of the light-emitting element D is connected to a cathode voltage PVEE, and the gate of the second reset transistor Mf2 is connected to a second reset control signal Sf2. The first end of the connecting transistor Mj is electrically connected to the second end of the driving transistor M0, the second end of the connecting transistor Mj is electrically connected to the gate of the driving transistor M0, and the gate of the connecting transistor Mj is connected to a connecting control signal Sj. The first end of the storage capacitor C is connected to a power supply voltage PVDD, and the second end of the storage capacitor C is electrically connected to the gate of the driving transistor M0. The control end of the data writing module 100 is electrically connected to a data control signal Sd, the input end of the data writing module 100 is connected to a data voltage Vdata, and the output end of the data writing module 100 is electrically connected to the first end of the driving transistor M0. Part of the light-emitting control module 200 is electrically connected between the power supply voltage PVDD and the first end of the driving transistor M0, and another part of the light-emitting control module 200 is electrically connected between the second end of the driving transistor M0 and the anode of the light-emitting element D, and the gate of the light-emitting control module 200 is connected to a light-emitting control signal Sg.

[0046] When necessary, the pixel circuit provided by the embodiment of the present application takes all the transistors and the modules included in the transistors as P-type transistors for example, i.e. the enable level of all the control signals is low. In combination with Figure 1 and Figure 2 As shown in the figures, the pixel circuit provided by the embodiment of the present application includes a reset stage T1, a data writing stage T2 and a light emitting stage T3 in sequence in one display frame. First, in the writing display frame 11:

[0047] In the reset stage T1, the first reset control signal Sf1 and the second reset control signal Sf2 are enabled as low, and then control the first reset transistor Mf1 and the second reset transistor Mf2 to be turned on respectively, so as to reset the gate of the driving transistor M0 and the anode of the light emitting element D respectively.

[0048] In the data writing stage T2, the data control signal Sd and the connection control signal Sj are enabled as low, and then control the data writing module 100 and the connection transistor Mj to be turned on respectively, and the data voltage Vdata is written to the gate of the driving transistor M0 through the data writing module 100 and the connection transistor Mj.

[0049] In the light emitting stage T3, the light emitting control signal Sg is enabled as low, and then controls the light emitting control module 200 to be turned on, so as to transmit the driving current I generated by the driving transistor M0 to the light emitting element D, and the light emitting element D is lit in response to the driving current I. At this time, the driving current I=k*(PVDD-Vdata) 2 , k is a constant.

[0050] Then, in the holding display frame 12: in the reset stage T1, the first reset control signal Sf1 and the second reset control signal Sf2 are both non-enabled high, and in the data writing stage T2, the data control signal Sd and the connection control signal Sj are also both non-enabled high, so as to keep the data voltage Vdata written in the writing display frame 11 when the holding display frame 12 is kept, and then in the light emitting stage T3, the light emitting control signal Sg is enabled as low, and then controls the light emitting control module 200 to be turned on, so as to transmit the driving current I generated by the driving transistor M0 to the light emitting element D, and the light emitting element D is lit in response to the driving current I.

[0051] As can be seen from the above, the size of the driving current I is related to the size of the data voltage Vdata, and the voltage of the power supply voltage PVDD is fixed; therefore, the embodiment of the present application can change the data writing module 100 conduction time by changing the enable duration L' of the data control signal Sd in the brightness transition stage Ax, and further can change the time of the data voltage Vdata written to the gate of the driving transistor M0; that is, when the enable duration L' of the data control signal Sd is reduced, the value of the driving current I can be improved, and further the light emitting element D can improve the brightness in response to the larger value of the driving current I; or when the enable duration L' of the data control signal Sd is increased, the value of the driving current I can be reduced, and further the light emitting element D can reduce the brightness in response to the smaller value of the driving current I; by adjusting the enable duration L' of the data control signal Sd in the brightness transition stage Ax, the brightness of the display panel in the brightness transition stage Ax is between the brightness in the first brightness stage A1 and the brightness in the second brightness stage A2 under the same gray scale condition.

[0052] In other embodiments of the present application, the transistor in the pixel circuit can also be an N-type transistor, and the enable level of the control signal is high, which needs to be selected according to actual application.

[0053] In an embodiment of the present application, the brightness transition stage provided by the present application can include one writing display frame, which can be located at the first working frequency or the second working frequency. Alternatively, the brightness transition stage provided by the embodiment of the present application includes multiple writing display frames, so as to better complete the smooth transition of brightness, wherein all the writing display frames included in the brightness transition stage are sequentially the first writing display frame to the Nth writing display frame in time sequence, the enable duration of the data control signal in the ith writing display frame is Li, N is an integer greater than 1, and i is a positive integer less than or equal to N; the enable duration of the data control signal in the first brightness stage and the second brightness stage is the same and is L, wherein Li is different from L. For details, refer to Figure 4 As shown in the timing diagram of another data control signal provided by the embodiment of the present application, the present application takes N as 3 for example, that is, the brightness transition stage Ax includes the first writing display frame 111 to the third writing display frame 113, the enable duration of the data control signal Sd in the first brightness stage A1 and the second brightness stage A2 is the same and is L, and the enable duration of the data control signal Sd in the first writing display frame 111 is L1, the enable duration in the second writing display frame 112 is L2, and the enable duration in the third writing display frame 113 is L3, wherein L1, L2 and L3 are all different from L.

[0054] It can be understood that the technical scheme provided by the embodiment of the present application can adjust the luminous brightness of the light emitting element D by adjusting the enable time length of the data control signal Sd. Therefore, the embodiment of the present application adjusts the enable time length L1 to L3 of the data control signal Sd in the brightness transition stage Ax, so that L1, L2 and L3 are different from L, and then the brightness of the display panel in the brightness transition stage Ax is between the brightness of the display panel in the first brightness stage A1 and the brightness of the display panel in the second brightness stage A2 under the same gray scale condition, so as to ensure that the brightness can be smoothly transitioned during the process of switching the first working frequency H1 to the second working frequency H2 of the display panel, avoid the problem of brightness mutation, avoid the flickering phenomenon of the display panel, and improve the visual experience.

[0055] In an embodiment of the present application, the brightness transition stage provided by the embodiment of the present application can span part of the time period of the first working frequency and part of the time period of the second working frequency of the display panel, so that the brightness transition stage includes both the write display frame in the first working frequency and the write display frame in the second working frequency. That is, the first write display frame to the Nth write display frame includes a jth write display frame, the jth write display frame is defined as the write display frame at the end of the first working frequency, and the j+1th write display frame is defined as the write display frame at the beginning of the second working frequency, j is a positive integer less than N; wherein L1 to Lj are the same, or L1 to Lj change along a trend; and L(j+1) to Ln are the same, or L(j+1) to Ln change along a trend. For details, refer to Figure 5As shown, the timing diagram of the data control signal provided by the embodiment of the present application is shown, and the present application takes N as 4 and j as 2 as an example for illustration, that is, the luminance transition stage Ax includes the first to fourth write display frames 111-114, the second write display frame 112 is the write display frame at the end of the first working frequency H1, and the third write display frame 113 is the write display frame at the beginning of the second working frequency H2, so that the luminance transition stage Ax includes the write display frame in the first working frequency H1 and the write display frame in the second working frequency H2. Wherein, L1 and L2 can be set the same, or L1 and L2 can change along the trend according to the size relationship of the first working frequency H1 and the second working frequency H2; and L3 and L4 can be set the same, or L3 and L4 can change along the trend according to the size relationship of the first working frequency H1 and the second working frequency H2, as long as the purpose of the luminance of the display panel in the luminance transition stage Ax being between the luminance of the display panel in the first luminance stage A1 and the luminance of the display panel in the second luminance stage A2 under the same gray scale condition is achieved, so as to ensure that the display panel can smoothly transition in luminance during the process of switching from the first working frequency H1 to the second working frequency H2, avoid the problem of luminance mutation, avoid the flickering phenomenon of the display panel, and improve the visual experience.

[0056] Optionally, in the technical scheme provided by the embodiment of the present application, under the condition that the luminance transition stage spans the first working frequency and the second working frequency, and the first working frequency is greater than the second working frequency, L1-Lj are the same and less than L, or L1-Lj are less than L and change along the decreasing trend; and L(j+1)-Ln are the same and greater than L, or L(j+1)-Ln are greater than L and change along the decreasing trend. Continue to refer to Figure 5 As shown, when the first working frequency H1 is greater than the second working frequency H2, that is, when the display panel switches from high working frequency to low working frequency, it is equivalent to switching the display panel from low luminance to high luminance under the same gray scale condition; then, the luminance needs to be increased at the end of the first working frequency H1, that is, L1 and L2 are set to be less than L, wherein L1 and L2 can be the same, or L1 is set to be greater than L2 to gradually increase the luminance of the display panel at the end of the first working frequency H1; and the luminance needs to be reduced at the beginning of the second working frequency H2, that is, L3 and L4 are set to be greater than L, wherein L3 and L4 can be the same, or L3 is set to be greater than L4 to reduce the luminance of the display panel as a whole while making the luminance show an increasing trend at the beginning of the second working frequency H2, thereby ensuring that the display panel can smoothly transition in luminance during the process of switching from the first working frequency H1 to the second working frequency H2, avoiding the problem of luminance mutation, avoiding the flickering phenomenon of the display panel, and improving the visual experience.

[0057] Alternatively, the technical scheme provided by the embodiment of the present application is that, under the condition that the first working frequency and the second working frequency cross in the brightness transition stage, and when the first working frequency is less than the second working frequency, the L1 to Lj are all the same and greater than L, or the L1 to Lj are all greater than L and change along an increasing trend; and the L(j+1) to Ln are all the same and less than L, or the L(j+1) to Ln are all less than L and change along an increasing trend. Figure 6 As shown in FIG. 6, it is another timing diagram of a data control signal provided by the embodiment of the present application, when the first working frequency H1' is less than the second working frequency H2', that is, when the display panel switches from a low working frequency to a high working frequency, which is equivalent to switching the display panel from a high brightness to a low brightness under the condition of the same gray scale; then, at the end of the first working frequency H1', the brightness needs to be reduced, that is, L1 and L2 are set to be greater than L, where L1 and L2 can be the same, or L1 is less than L2 to reduce the brightness of the display panel as a whole while making the brightness decrease at the end of the first working frequency H1'; and at the initial end of the second working frequency H2', the brightness needs to be increased, that is, L3 and L4 are set to be less than L, where L3 and L4 can be set to be the same, or L3 is set to be less than L4 to increase the brightness of the display panel as a whole while gradually reducing at the initial end of the second working frequency H2', thereby ensuring that the brightness can be smoothly transitioned during the process of switching the display panel from the first working frequency H1' to the second working frequency H2', avoiding the problem of brightness mutation, avoiding the flickering phenomenon of the display panel, and improving the visual experience.

[0058] In an embodiment of the present application, the brightness transition stage provided by the embodiment of the present application can be located at the first working frequency. That is, the Nth writing display frame provided by the embodiment of the present application is the writing display frame at the end of the first working frequency; where L1 to Ln are the same, or L1 to Ln change along a trend. For details, refer to FIG. 5. Figure 7 As shown in FIG. 6, it is another timing diagram of a data control signal provided by the embodiment of the present application, when the first working frequency H1' is less than the second working frequency H2', that is, when the display panel switches from a low working frequency to a high working frequency, which is equivalent to switching the display panel from a high brightness to a low brightness under the condition of the same gray scale; then, at the end of the first working frequency H1', the brightness needs to be reduced, that is, L1 and L2 are set to be greater than L, where L1 and L2 can be the same, or L1 is less than L2 to reduce the brightness of the display panel as a whole while making the brightness decrease at the end of the first working frequency H1'; and at the initial end of the second working frequency H2', the brightness needs to be increased, that is, L3 and L4 are set to be less than L, where L3 and L4 can be set to be the same, or L3 is set to be less than L4 to increase the brightness of the display panel as a whole while gradually reducing at the initial end of the second working frequency H2', thereby ensuring that the brightness can be smoothly transitioned during the process of switching the display panel from the first working frequency H1' to the second working frequency H2', avoiding the problem of brightness mutation, avoiding the flickering phenomenon of the display panel, and improving the visual experience.

[0059] Optionally, in the technical scheme provided by the embodiment of the present application, all the brightness transition stages are located in the first working frequency condition, and when the first working frequency is greater than the second working frequency, L1 to Ln are all the same and less than L, or L1 to Ln are all less than L and change in a decreasing trend. As shown in FIG. 4, when the first working frequency H1 is greater than the second working frequency H2, that is, when the display panel switches from a high working frequency to a low working frequency, it is equivalent to switching the display panel from low brightness to high brightness under the condition of the same gray scale. Then, at the end of the first working frequency H1, the brightness needs to be increased, that is, L1, L2 and L3 are set to be less than L, wherein L1, L2 and L3 can be the same, or L1 to L3 are set to change in a decreasing trend, so as to gradually increase the brightness of the display panel at the end of the first working frequency H1. Thus, during the process of switching the display panel from the first working frequency H1 to the second working frequency H2, the brightness can be smoothly transitioned, the problem of brightness mutation can be avoided, the flickering phenomenon of the display panel can be avoided, and the visual experience is improved. Figure 7 Alternatively, in the technical scheme provided by the embodiment of the present application, all the brightness transition stages are located in the first working frequency condition, and when the first working frequency is less than the second working frequency, L1 to Ln are all the same and greater than L, or L1 to Ln are all greater than L and change in an increasing trend. As shown in FIG. 5, which is another timing diagram of a data control signal provided by the embodiment of the present application, when the first working frequency H1' is less than the second working frequency H2', that is, when the display panel switches from a low working frequency to a high working frequency, it is equivalent to switching the display panel from high brightness to low brightness under the condition of the same gray scale. Then, at the end of the first working frequency H1', the brightness needs to be reduced, that is, L1, L2 and L3 are set to be greater than L, wherein L1, L2 and L3 can be the same, or L1 to L3 are set to change in an increasing trend, so as to reduce the brightness of the display panel as a whole while making the brightness decrease at the end of the first working frequency H1'. Thus, during the process of switching the display panel from the first working frequency H1' to the second working frequency H2', the brightness can be smoothly transitioned, the problem of brightness mutation can be avoided, the flickering phenomenon of the display panel can be avoided, and the visual experience is improved.

[0060] Figure 8 In an embodiment of the present application, the brightness transition stages provided by the embodiment of the present application can all be located in the second working frequency. That is, the first write display frame provided by the embodiment of the present application is the initial write display frame under the second working frequency. L1 to Ln are all the same, or L1 to Ln change in a trend. For details, refer to FIG. 6.

[0061] In an embodiment of the present application, the brightness transition stages provided by the embodiment of the present application can all be located in the second working frequency. That is, the first write display frame provided by the embodiment of the present application is the initial write display frame under the second working frequency. L1 to Ln are all the same, or L1 to Ln change in a trend. For details, refer to FIG. 6. Figure 9 ​As shown, the timing diagram of another data control signal provided by the embodiment of the present application is shown, and the present application is taken as an example of N being 2, that is, the luminance transition stage Ax includes the first write display frame 111 and the second write display frame 112, and the first write display frame 111 is the initial write display frame at the second working frequency H2. Wherein, L1 and L2 can be set to be the same, or L1 to L2 can change along the trend according to the size relationship of the first working frequency H1 and the second working frequency H2, as long as the purpose of the luminance of the display panel in the luminance transition stage Ax being between the luminance of the display panel in the first luminance stage A1 and the luminance of the display panel in the second luminance stage A2 under the same gray scale condition is achieved, so as to ensure that the luminance can be smoothly transitioned during the process of the display panel switching from the first working frequency H1 to the second working frequency H2, the problem of luminance mutation is avoided, the flicker phenomenon of the display panel is avoided, and the visual experience is improved.

[0062] Optionally, in the technical scheme provided by the embodiment of the present application, the luminance transition stage is entirely located under the second working frequency condition, and when the first working frequency is greater than the second working frequency, L1 to Ln are the same and greater than L, or L1 to Ln are greater than L and change along a decreasing trend. Figure 9 As shown, when the first working frequency H1 is greater than the second working frequency H2, that is, when the display panel switches from high working frequency to low working frequency, it is equivalent to switching the display panel from low luminance to high luminance under the same gray scale condition; and then, the luminance needs to be reduced at the initial end of the second working frequency H2, that is, L1 and L2 are set to be greater than L, wherein L3 and L4 can be the same, or L1 is set to be greater than L2 to reduce the luminance of the display panel as a whole while making the luminance increase at the initial end of the second working frequency H2, thereby ensuring that the luminance can be smoothly transitioned during the process of the display panel switching from the first working frequency H1 to the second working frequency H2, the problem of luminance mutation is avoided, the flicker phenomenon of the display panel is avoided, and the visual experience is improved.

[0063] Or, when the luminance transition stage is entirely located under the second working frequency condition, and when the first working frequency is less than the second working frequency, L1 to Ln are the same and less than L, or L1 to Ln are less than L and change along an increasing trend. Referring to Figure 10As shown, the timing diagram of the data control signal provided by the embodiment of the present application, when the first working frequency H1' is less than the second working frequency H2', that is, when the display panel switches from low working frequency to high working frequency, which is equivalent to switching from high brightness to low brightness under the same gray scale condition; then, at the initial end of the second working frequency H2', the brightness needs to be increased, that is, L1 and L2 are set to be less than L, wherein L1 and L2 can be set to be the same, or L1 is set to be less than L2 to gradually reduce the brightness while increasing the overall brightness of the display panel at the initial end of the second working frequency H2', thereby ensuring that the brightness can be smoothly transitioned during the process of switching the first working frequency H1' to the second working frequency H2', avoiding the problem of brightness mutation, avoiding the flickering phenomenon of the display panel, and improving the visual experience.

[0064] Further, the display panel provided by the embodiment of the present application can also adjust the brightness of the display panel by changing the enablement duration of the light emitting control signal (that is, the duration of transmitting the driving current to the light emitting element), and then by optimizing the enablement duration of the light emitting control signal in the brightness transition stage, the brightness of the display panel in the brightness transition stage is located between the brightness in the first brightness stage and the brightness in the second brightness stage under the same gray scale condition, which ensures that the brightness can be smoothly transitioned during the process of switching the first working frequency to the second working frequency, avoids the problem of brightness mutation, avoids the flickering phenomenon of the display panel, and improves the visual experience. For details Figure 1 and Figure 11 As shown, Figure 11 The timing diagram of the light emitting control signal provided by the embodiment of the present application, wherein the pixel circuit includes a light emitting control module 200, the light emitting control module 200 is used to transmit a driving signal to a light emitting element D in response to the enablement of a light emitting control signal Sg at the display frame 10; the enablement duration K of the light emitting control signal Sg in the first brightness stage A1 and the second brightness stage A2 is the same, and the enablement duration K' of the light emitting control signal Sg in the brightness transition stage Ax is different from the enablement duration K in the first brightness stage A1 and the second brightness stage A2, so that the brightness of the display panel in the brightness transition stage Ax is located between the brightness in the first brightness stage A1 and the brightness in the second brightness stage A2 under the same gray scale condition, wherein the brightness transition stage Ax at least includes the display frame 10 at the end of the first working frequency H1, and / or the display frame 10 at the initial end of the second working frequency H2.

[0065] It can be understood that the brightness of the light emitting element D is related to the light emitting duration, when the light emitting duration of the light emitting element D increases, the light emitting brightness of the light emitting element D will increase, and when the light emitting duration of the light emitting element D decreases, the light emitting brightness of the light emitting element D will decrease. Therefore, the embodiment of the present application changes the enabling duration L' of the light emitting control signal Sg in the brightness transition stage Ax on the basis of changing the enabling duration of the data control signal Sd, so as to change the light emitting duration of the light emitting element D, thereby adjusting the enabling duration L' of the light emitting control signal Sg in the brightness transition stage Ax, so as to achieve the purpose that the brightness of the display panel in the brightness transition stage Ax is between the brightness of the display panel in the first brightness stage A1 and the brightness of the display panel in the second brightness stage A2 under the same gray scale condition.

[0066] In an embodiment of the present application, the brightness transition stage provided by the present application can include one display frame, which can be located at the first working frequency or the second working frequency. Alternatively, the brightness transition stage provided by the embodiment of the present application can include multiple display frames, so as to better complete the smooth transition of brightness, wherein all the display frames included in the brightness transition stage are sequentially first display frame to Mth display frame in time sequence, the enabling duration of the light emitting control signal in the hth display frame is Ki, M is an integer greater than 1, and h is a positive integer less than or equal to M; the enabling durations of the light emitting control signal in the first brightness stage and the second brightness stage are the same and are K, wherein Kh is different from K. For details, refer to Figure 12 It can be understood that the brightness transition stage provided by the present application can include one display frame, which can be located at the first working frequency or the second working frequency. Alternatively, the brightness transition stage provided by the embodiment of the present application can include multiple display frames, so as to better complete the smooth transition of brightness, wherein all the display frames included in the brightness transition stage are sequentially first display frame to Mth display frame in time sequence, the enabling duration of the light emitting control signal in the hth display frame is Ki, M is an integer greater than 1, and h is a positive integer less than or equal to M; the enabling durations of the light emitting control signal in the first brightness stage and the second brightness stage are the same and are K, wherein Kh is different from K. For details, refer to

[0067] It can be understood that the technical solution provided by the embodiment of the present application can adjust the light emitting brightness of the light emitting element D by adjusting the enabling duration of the light emitting control signal Sg. Therefore, the embodiment of the present application adjusts the enabling durations K1 to K3 of the light emitting control signal Sg in the brightness transition stage Ax, so that K1, K2 and K3 are different from K, thereby achieving the purpose that the brightness of the display panel in the brightness transition stage Ax is between the brightness of the display panel in the first brightness stage A1 and the brightness of the display panel in the second brightness stage A2 under the same gray scale condition, so as to ensure that the brightness can be smoothly transitioned during the process of switching the first working frequency H1 to the second working frequency H2 of the display panel, avoid the problem of brightness mutation, avoid the flickering phenomenon of the display panel, and improve the visual experience.

[0068] In an embodiment of the present application, the luminance transition stage can span a portion of the time period of the first operating frequency and a portion of the time period of the second operating frequency, so that the luminance transition stage includes both display frames in the first operating frequency and display frames in the second operating frequency. That is, the first display frame to the third display frame include a s-th display frame, the s-th display frame is defined as the display frame at the end of the first operating frequency, and the s+1-th display frame is defined as the display frame at the beginning of the second operating frequency, s is a positive integer less than M; wherein K1 to Ks are the same, or K1 to Ks change in a trend; and K(s+1) to Km are the same, or K(s+1) to Km change in a trend. Referring to Figure 13 As shown in the timing diagram of another luminance control signal provided by an embodiment of the present application, the present application is described by taking M as 4 and s as 2 as an example, that is, the luminance transition stage Ax includes the first display frame 101 to the fourth display frame 104, the second display frame 102 is the display frame at the end of the first operating frequency H1, and the third display frame 103 is the display frame at the beginning of the second operating frequency H2, so that the luminance transition stage Ax includes both display frames in the first operating frequency H1 and display frames in the second operating frequency H2. Wherein K1 and K2 can be set to be the same, or K1 and K2 can change in a trend according to the size relationship between the first operating frequency H1 and the second operating frequency H2; and K3 and K4 can be set to be the same, or K3 and K4 can change in a trend according to the size relationship between the first operating frequency H1 and the second operating frequency H2, as long as the luminance of the display panel during the luminance transition stage Ax is between the luminance of the display panel during the first luminance stage A1 and the luminance of the display panel during the second luminance stage A2 under the same gray scale condition, so as to ensure that the luminance can be smoothly transitioned during the process of switching from the first operating frequency H1 to the second operating frequency H2, avoid the problem of luminance mutation, avoid the flickering phenomenon of the display panel, and improve the visual experience.

[0069] Optionally, in the technical solution provided by the embodiment of the present application, under the condition that the luminance transition stage spans the first operating frequency and the second operating frequency, and the first operating frequency is greater than the second operating frequency, K1 to Ks are the same and greater than K, or K1 to Ks are greater than K and change in an increasing trend; and K(s+1) to Km are the same and less than K, or K(s+1) to Km are less than K and change in an increasing trend. Referring to Figure 13As shown, when the first working frequency H1 is greater than the second working frequency H2, that is, when the display panel switches from a high working frequency to a low working frequency, it is equivalent to switching the display panel from a low brightness to a high brightness under the same gray scale condition; further, the brightness needs to be increased at the end of the first working frequency H1, that is, K1 and K2 are set to be greater than K, where K1 and K2 can be the same, or K1 is set to be less than K2 to gradually increase the brightness of the display panel at the end of the first working frequency H1; and the brightness needs to be decreased at the initial end of the second working frequency H2, that is, K3 and K4 are set to be less than K, where K3 and K4 can be the same, or K3 is set to be less than K4 to gradually decrease the brightness of the display panel at the initial end of the second working frequency H2 while making the brightness show an increasing trend, thereby ensuring that the brightness can be smoothly transitioned during the process of switching the display panel from the first working frequency H1 to the second working frequency H2, avoiding the problem of brightness mutation, avoiding flickering of the display panel, and improving the visual experience.

[0070] Alternatively, when the first working frequency is less than the second working frequency, K1 to Ks are all the same and less than K, or K1 to Ks are all less than K and change along a decreasing trend; and K(s+1) to Km are all the same and greater than K, or K(s+1) to Km are all greater than K and change along a decreasing trend. Figure 14 As shown, another time sequence diagram of a light emitting control signal provided by the embodiment of the present application is shown, when the first working frequency H1' is less than the second working frequency H2', that is, when the display panel switches from a low working frequency to a high working frequency, it is equivalent to switching the display panel from a high brightness to a low brightness under the same gray scale condition; further, the brightness needs to be decreased at the end of the first working frequency H1', that is, K1 and K2 are set to be less than K, where K1 and K2 can be the same, or K1 is greater than K2 to gradually decrease the brightness of the display panel at the end of the first working frequency H1' while making the brightness show a decreasing trend; and the brightness needs to be increased at the initial end of the second working frequency H2', that is, K3 and K4 are set to be greater than L, where K3 and K4 can be set to be the same, or K3 is set to be greater than K4 to gradually decrease the brightness of the display panel at the initial end of the second working frequency H2' while making the brightness show an increasing trend, thereby ensuring that the brightness can be smoothly transitioned during the process of switching the display panel from the first working frequency H1' to the second working frequency H2', avoiding the problem of brightness mutation, avoiding flickering of the display panel, and improving the visual experience.

[0071] In an embodiment of the present application, the brightness transition stage provided by the embodiment of the present application can be located at the first working frequency. That is, the Mth display frame provided by the embodiment of the present application is the display frame at the end of the first working frequency; where K1 to Km are all the same, or K1 to Km change along a trend. For details, refer toFigure 15 As shown in FIG. 6, which is a timing diagram of another light-emitting signal provided by an embodiment of the present application, the present application is described by taking N=3 as an example, i.e., the luminance transition stage Ax includes the first display frame 101 to the third display frame 103, and the third display frame 103 is the display frame at the end of the first operating frequency H1. Among them, K1, K2 and K3 can be set the same, or K1 to K3 can change along a trend according to the size relationship between the first operating frequency H1 and the second operating frequency H2, as long as the purpose of the luminance of the display panel in the luminance transition stage Ax being between the luminance of the display panel in the first luminance stage A1 and the luminance of the display panel in the second luminance stage A2 under the same gray scale condition is achieved, so as to ensure that the display panel can smoothly transition in luminance during the process of switching from the first operating frequency H1 to the second operating frequency H2, avoid the problem of luminance mutation, avoid flickering of the display panel, and improve the visual experience.

[0072] Optionally, in the technical solution provided by the embodiment of the present application, the luminance transition stage is entirely under the condition of the first operating frequency, and when the first operating frequency is greater than the second operating frequency, K1 to Km are the same and greater than K, or K1 to Km are greater than K and change along an increasing trend. Figure 15 As shown in FIG. 6, when the first operating frequency H1 is greater than the second operating frequency H2, i.e., when the display panel switches from a high operating frequency to a low operating frequency, it is equivalent to switching the display panel from low luminance to high luminance under the same gray scale condition; and then, at the end of the first operating frequency H1, the luminance needs to be increased, i.e., K1, K2 and K3 are set to be greater than K, wherein K1, K2 and K3 can be set the same, or K1 to K3 are set to increase in trend, so as to gradually increase the luminance of the display panel at the end of the first operating frequency H1. Thus, the display panel can smoothly transition in luminance during the process of switching from the first operating frequency H1 to the second operating frequency H2, avoid the problem of luminance mutation, avoid flickering of the display panel, and improve the visual experience.

[0073] Alternatively, in the technical solution provided by the embodiment of the present application, the luminance transition stage is entirely under the condition of the first operating frequency, and when the first operating frequency is less than the second operating frequency, K1 to Km are the same and less than K, or K1 to Km are less than K and change along a decreasing trend. Figure 16As shown in the timing diagram of the light emitting control signal provided by the embodiment of the present application, when the first working frequency H1' is less than the second working frequency H2', that is, when the display panel is switched from low working frequency to high working frequency, which is equivalent to switching the display panel from high brightness to low brightness under the same gray scale condition; then, at the end of the first working frequency H1', the brightness needs to be reduced, that is, K1, K2 and K3 are set to be less than K, wherein K1, K2 and K3 can be the same, or K1 to K3 are set to decrease, so as to reduce the brightness of the display panel as a whole while making the brightness decrease at the end of the first working frequency H1', thereby ensuring that the brightness can be smoothly transitioned during the process of switching the display panel from the first working frequency H1' to the second working frequency H2', avoiding the problem of brightness mutation, avoiding the flickering phenomenon of the display panel, and improving the visual experience.

[0074] In an embodiment of the present application, the brightness transition stage provided by the embodiment of the present application can be located in the second working frequency. That is, the first display frame provided by the embodiment of the present application is the initial display frame when the first display frame is in the second working frequency; wherein K1 to Km are the same, or K1 to Km change along a trend. For details, refer to Figure 17 As shown in the timing diagram of the light emitting control signal provided by the embodiment of the present application, the present application takes N as 2 as an example for illustration, that is, the brightness transition stage Ax includes the first display frame 101 and the second display frame 102, and the first display frame 101 is the initial display frame when the first display frame is in the second working frequency H2. Wherein K1 and K2 can be set to be the same, or K1 to K2 can change along a trend according to the size relationship between the first working frequency H1 and the second working frequency H2, as long as the brightness of the display panel in the brightness transition stage Ax is located between the brightness of the display panel in the first brightness stage A1 and the brightness of the display panel in the second brightness stage A2 under the same gray scale condition, so as to ensure that the brightness can be smoothly transitioned during the process of switching the display panel from the first working frequency H1 to the second working frequency H2, avoiding the problem of brightness mutation, avoiding the flickering phenomenon of the display panel, and improving the visual experience.

[0075] Optionally, under the condition that the brightness transition stage is located in the second working frequency, and when the first working frequency is greater than the second working frequency, K1 to Km are the same and less than K, or K1 to Km change along an increasing trend. Continue as Figure 17As shown, when the first working frequency H1 is greater than the second working frequency H2, that is, when the display panel switches from a high working frequency to a low working frequency, it is equivalent to switching the display panel from a low brightness to a high brightness under the same gray scale condition. Then, at the initial end of the second working frequency H2, the brightness needs to be reduced, that is, K1 and K2 are set to be less than K, where K1 and K2 can be the same, or K1 is set to be less than K2 to make the brightness show an increasing trend while reducing the overall brightness of the display panel at the initial end of the second working frequency H2. Thus, the brightness can be smoothly transitioned during the process of switching the display panel from the first working frequency H1 to the second working frequency H2, avoiding the problem of brightness mutation and the flickering phenomenon of the display panel, and improving the visual experience.

[0076] Alternatively, when the brightness transition phase is entirely under the condition of the second working frequency, and the first working frequency is less than the second working frequency, K1 to Km are the same and greater than K, or K1 to Km are all greater than K and change along a decreasing trend. Figure 18 As shown, another timing diagram of the light emitting control signal provided by the embodiment of the present application is shown, when the first working frequency H1' is less than the second working frequency H2', that is, when the display panel switches from a low working frequency to a high working frequency, it is equivalent to switching the display panel from a high brightness to a low brightness under the same gray scale condition. Then, at the initial end of the second working frequency H2', the brightness needs to be increased, that is, K1 and K2 are set to be greater than L, where K1 and K2 can be set to be the same, or K1 is set to be greater than K2 to gradually reduce the brightness while increasing the overall brightness of the display panel at the initial end of the second working frequency H2'. Thus, the brightness can be smoothly transitioned during the process of switching the display panel from the first working frequency H1' to the second working frequency H2', avoiding the problem of brightness mutation and the flickering phenomenon of the display panel, and improving the visual experience.

[0077] In an embodiment of the present application, the present application can output different enable time lengths of the data control signal in different time periods. Alternatively, the present application can also divide the data control signal into two sub-data control signals to achieve the purpose of changing the enable time length of the data control signal in the brightness transition phase. Details are shown in Figure 19 and Figure 20 As shown, Figure 19 Another structure diagram of the pixel circuit provided by the embodiment of the present application is shown, Figure 20The timing diagram of the first sub-data control signal and the second sub-data control signal provided by the embodiment of the present application, wherein L1 to Ln are all greater than L, the data writing module 100 comprises a first data writing transistor Md1 and a second data writing transistor Md2; the data control signal Sd comprises a first sub-data control signal Sd1 and a second sub-data control signal Sd2, the timing of the first sub-data control signal Sd1 and the second sub-data control signal Sd2 is staggered; the first end of the first data writing transistor Md1 and the first end of the second data writing transistor Md2 are electrically connected and connected to the data voltage Vdata, the second end of the first data writing transistor Md1 and the second end of the second data writing transistor Md2 are electrically connected as an output end; the gate of the first data writing transistor Md1 is connected to the first sub-data control signal Sd1, and the gate of the second data writing transistor Md2 is connected to the second sub-data control signal Sd2.

[0078] Wherein, in the first brightness stage A1 and the second brightness stage A2, the enablement of the data control signal Sd is the enablement of the first sub-data control signal Sd1; and in the brightness transition stage Ax, the enablement of the data control signal Sd is the superposition of the enablement of the first sub-data control signal Sd1 and the enablement of the second sub-data control signal Sd2. That is, in the first brightness stage A1 and the second brightness stage A2, the signal of the first sub-data control signal Sd1 is the signal of the data control signal Sd, that is, the enablement time length of the data control signal Sd in the first brightness stage A1 and the second brightness stage A2 is L; and in the brightness transition stage Ax, due to the timing stagger of the first sub-data control signal Sd1 and the second sub-data control signal Sd2, the signal of the first sub-data control signal Sd1 and the signal of the second sub-data control signal Sd2 are superposed, that is, the enablement time length L' of the data control signal Sd can be adjusted, so as to achieve the purpose of adjusting the enablement time length of the data control signal Sd.

[0079] Similarly, the present application can output different enablement time lengths of the light-emitting control signal in different time periods. Alternatively, the present application can also divide the light-emitting control signal into two sub-light-emitting control signals to achieve the purpose of changing the enablement time length of the light-emitting control signal in the brightness transition stage. Figure 21 and Figure 22 As shown in Figure 21 Another structure diagram of a pixel circuit provided by the embodiment of the present application, Figure 22A timing diagram of the first sub-emitting control signal and the second sub-emitting control signal provided by the embodiment of the present application is shown in the figure, wherein the pixel circuit comprises a driving transistor M0, K1 to Km are all greater than K, the emitting control module 200 comprises a first emitting control transistor Mg1, a second emitting control transistor Mg2, a first auxiliary emitting control transistor Mgf1 and a second auxiliary emitting control transistor Mgf2, the emitting control signal Sg comprises a first sub-emitting control signal Sg1 and a second sub-emitting control signal Sg2, the timing of the first sub-emitting control signal Sg1 and the second sub-emitting control signal Sg2 is staggered, the first end of the first emitting control transistor Mg1 and the first end of the first auxiliary emitting control transistor Mgf1 are electrically connected and connected to a power supply voltage PVDD, the second end of the first emitting control transistor Mg1 and the second end of the first auxiliary emitting control transistor Mgf1 are electrically connected and connected to the first end of the driving transistor M0, the first end of the second emitting control transistor Mg2 and the first end of the second auxiliary emitting control transistor Mgf2 are electrically connected and connected to the second end of the driving transistor M0, the second end of the second emitting control transistor Mg2 and the second end of the second auxiliary emitting control transistor Mgf2 are electrically connected and connected to the light emitting element D, the gate of the first emitting control transistor Mg1 and the gate of the second emitting control transistor Mg2 are connected to the first sub-emitting control signal Sg1, and the gate of the first auxiliary emitting control transistor Mgf1 and the gate of the second auxiliary emitting control transistor Mgf2 are connected to the second sub-emitting control signal Sg2.

[0080] In the first brightness stage A1 and the second brightness stage A2, the enablement of the emitting control signal Sg is the enablement of the first sub-emitting control signal Sg1, and in the brightness transition stage Ax, the enablement of the emitting control signal Sg is the superposition of the enablement of the first sub-emitting control signal Sg1 and the enablement of the second sub-emitting control signal Sg2. That is, in the first brightness stage A1 and the second brightness stage A2, the signal of the first sub-emitting control signal Sg1 is the signal of the emitting control signal Sg, that is, the enablement duration K of the emitting control signal Sg in the first brightness stage A1 and the second brightness stage A2 is K, and in the brightness transition stage Ax, due to the timing stagger of the first sub-emitting control signal Sg1 and the second sub-emitting control signal Sg2, the signal of the first sub-emitting control signal Sg1 and the signal of the second sub-emitting control signal Sg2 are superposed, that is, the enablement duration K' of the emitting control signal Sg can be increased, so as to achieve the purpose of adjusting the enablement duration of the emitting control signal Sg.

[0081] Correspondingly, the embodiment of the present application also provides a driving method of a display panel, which is used for driving the display panel provided by any one of the above embodiments, and the driving method comprises:

[0082] In the process that the display panel is switched from the first working frequency to the second working frequency, a first brightness stage, a brightness transition stage and a second brightness stage are sequentially performed, wherein

[0083] The enable duration of the data control signal is controlled to be the same in the first brightness stage and the second brightness stage;

[0084] The enable duration of the data control signal is controlled to be different in the brightness transition stage from that in the first brightness stage and the second brightness stage, so that, under the same gray scale condition, the brightness of the display panel in the brightness transition stage is between the brightness in the first brightness stage and the brightness in the second brightness stage.

[0085] Correspondingly, the embodiment of the present application also provides a display device, which comprises the display panel provided by any one of the above embodiments.

[0086] Reference Figure 23 As shown in the figure, the display device 1000 provided by the embodiment of the present application can be a mobile terminal device.

[0087] Optionally, the display device provided by the embodiment of the present application can also be a computer, a wearable display device or other electronic display device, and the present application does not make a specific limitation in this regard.

[0088] The display panel, the driving method thereof and the display device provided by the embodiment of the present application can set the enable duration of the data control signal in the brightness transition stage to be different from that in the first brightness stage and the second brightness stage, so that, under the same gray scale condition, the brightness of the display panel in the brightness transition stage is between the brightness in the first brightness stage and the brightness in the second brightness stage, thereby ensuring that the brightness can be smoothly transitioned in the process that the display panel is switched from the first working frequency to the second working frequency, avoiding the problem of brightness mutation, avoiding the flickering phenomenon of the display panel, and improving the visual experience.

[0089] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by terms such as "central", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0090] In addition, the terms "first", "second", etc. appear only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0091] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0092] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0093] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising, but not limited to, any indicated features, integers, steps or components. It is also to be understood that the terminology "comprising" can be replaced by the terminology "consisting of" or "consisting essentially of" in some embodiments or examples.

[0094] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and the ordinary skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present disclosure.

Claims

1. A display panel, characterized in that, The display panel includes a first operating frequency and a second operating frequency, and the display panel includes a plurality of display frames, the display frames including write display frames; under the conditions of the first operating frequency and the second operating frequency, the number of write display frames of the display panel in the same time period is different; the display panel includes a pixel circuit, the pixel circuit including a data writing module, which is used to write data voltage into the pixel circuit when the write display frame responds to the enable of a data control signal; During the process of the display panel switching from the first operating frequency to the second operating frequency, a first brightness stage, a brightness transition stage, and a second brightness stage are performed sequentially. The enable duration of the data control signal is the same in the first brightness stage and the second brightness stage, and the enable duration of the data control signal in the brightness transition stage is different from the enable duration in the first brightness stage and the second brightness stage, so that under the same grayscale conditions, the brightness of the display panel in the brightness transition stage is located between the brightness of the display panel in the first brightness stage and the brightness in the second brightness stage. The brightness transition stage includes at least the written display frame at the end of the first operating frequency and / or the written display frame at the beginning of the second operating frequency.

2. The display panel according to claim 1, characterized in that, The brightness transition phase includes all the written display frames, which are sequentially from the first written display frame to the Nth written display frame in chronological order. The enable duration of the data control signal in the i-th written display frame is Li, where N is an integer greater than 1 and i is a positive integer less than or equal to N. The enable duration of the data control signal is the same, L, in both the first brightness stage and the second brightness stage, where Li is different from L.

3. The display panel according to claim 2, characterized in that, The j-th write display frame is the end of the write display frame when the first operating frequency is used, and the (j+1)-th write display frame is the initial write display frame when the second operating frequency is used, where j is a positive integer less than N; Where L1 to Lj are all the same, or L1 to Lj change along a trend; And, L(j+1) to Ln are all the same, or, L(j+1) to Ln change along a trend.

4. The display panel according to claim 3, characterized in that, When the first operating frequency is less than the second operating frequency, L1 to Lj are all the same and greater than L, or L1 to Lj are all greater than L and change along an increasing trend; and L(j+1) to Ln are all the same and less than L, or L(j+1) to Ln are all less than L and change along an increasing trend. Alternatively, when the first operating frequency is greater than the second operating frequency, L1 to Lj are all the same and less than L, or L1 to Lj are all less than L and change along a decreasing trend; and L(j+1) to Ln are all the same and greater than L, or L(j+1) to Ln are all greater than L and change along a decreasing trend.

5. The display panel according to claim 2, characterized in that, The Nth write display frame is the write display frame at the end of the first operating frequency; Where L1 to Ln are all the same, or L1 to Ln change along a trend.

6. The display panel according to claim 5, characterized in that, When the first operating frequency is less than the second operating frequency, L1 to Ln are all the same and greater than L, or L1 to Ln are all greater than L and change along an increasing trend; Alternatively, when the first operating frequency is greater than the second operating frequency, L1 to Ln are all the same and less than L, or L1 to Ln are all less than L and change in a decreasing trend.

7. The display panel according to claim 2, characterized in that, The first write display frame is the initial write display frame at the second operating frequency; wherein L1 to Ln are all the same, or L1 to Ln vary along a trend.

8. The display panel according to claim 7, characterized in that, When the first operating frequency is less than the second operating frequency, L1 to Ln are all the same and less than L, or L1 to Ln are all less than L and change along an increasing trend; Alternatively, when the first operating frequency is greater than the second operating frequency, L1 to Ln are all the same and greater than L, or L1 to Ln are all greater than L and change in a decreasing trend.

9. The display panel according to claim 1, characterized in that, The pixel circuit includes a light-emitting control module, which is used to transmit a driving signal to the light-emitting element in response to the enable of the light-emitting control signal during the display frame. The enable duration of the light-emitting control signal is the same during the first brightness stage and the second brightness stage, and the enable duration of the light-emitting control signal during the brightness transition stage is different from the enable duration during the first brightness stage and the second brightness stage, such that under the same grayscale conditions, the brightness of the display panel during the brightness transition stage is located between the brightness of the display panel during the first brightness stage and the brightness during the second brightness stage. The brightness transition stage includes at least the display frame at the end of the first operating frequency and / or the display frame at the beginning of the second operating frequency.

10. The display panel according to claim 9, characterized in that, The brightness transition phase includes all the display frames in chronological order, from the first display frame to the Mth display frame. The enable duration of the light emission control signal in the hth display frame is Ki, where M is an integer greater than 1 and h is a positive integer less than or equal to M. The enable duration of the light emission control signal is the same, K, in both the first brightness stage and the second brightness stage, where Kh is different from K.

11. The display panel according to claim 10, characterized in that, The s-th display frame is the end display frame at the first operating frequency, and the (s+1)-th display frame is the initial display frame at the second operating frequency, where s is a positive integer less than M; Where K1 to Ks are all the same, or K1 to Ls change along a trend; And, K(s+1) to Km are the same, or, K(s+1) to Km change along the trend.

12. The display panel according to claim 11, characterized in that, When the first operating frequency is less than the second operating frequency, K1 to Ks are all the same and less than K, or K1 to Ks are all less than K and change along a decreasing trend; and K(s+1) to Km are all the same and greater than K, or K(s+1) to Km are all greater than K and change along a decreasing trend. Alternatively, when the first operating frequency is greater than the second operating frequency, K1 to Ks are all the same and greater than K, or K1 to Ks are all greater than K and change along an increasing trend; and K(s+1) to Km are all the same and less than K, or K(s+1) to Km are all less than K and change along an increasing trend.

13. The display panel according to claim 10, characterized in that, The Mth display frame is the display frame at the end of the first operating frequency; Where K1 to Km are the same, or K1 to Km change along a trend.

14. The display panel according to claim 13, characterized in that, When the first operating frequency is less than the second operating frequency, K1 to Km are all the same and less than K, or K1 to Km are all less than K and change along a decreasing trend; Alternatively, when the first operating frequency is greater than the second operating frequency, K1 to Km are all the same and greater than K, or K1 to Km are all greater than K and change with an increasing trend.

15. The display panel according to claim 10, characterized in that, The first display frame is the initial display frame at the second operating frequency; Where K1 to Km are the same, or K1 to Km change along a trend.

16. The display panel according to claim 15, characterized in that, When the first operating frequency is less than the second operating frequency, K1 to Km are all the same and greater than K, or K1 to Km are all greater than K and change along a decreasing trend; Alternatively, when the first operating frequency is greater than the second operating frequency, K1 to Km are all the same and less than K, or K1 to Km are all less than K and change with an increasing trend.

17. The display panel according to claim 6 or 8, characterized in that, L1 to Ln are all greater than L, and the data writing module includes a first data writing transistor and a second data writing transistor; the data control signal includes a first sub-data control signal and a second sub-data control signal, and the timing of the first sub-data control signal and the second sub-data control signal is misaligned; The first terminal of the first data writing transistor and the first terminal of the second data writing transistor are electrically connected and connected to the data voltage. The second terminal of the first data writing transistor and the second terminal of the second data writing transistor are electrically connected as an output terminal. The gate of the first data writing transistor is connected to the first sub-data control signal, and the gate of the second data writing transistor is connected to the second sub-data control signal. Specifically, during the first brightness stage and the second brightness stage, the enabling of the data control signal is the enabling of the first sub-data control signal; and during the brightness transition stage, the enabling of the data control signal is the superposition of the enabling of the first sub-data control signal and the enabling of the second sub-data control signal.

18. The display panel according to claim 14 or 16, characterized in that, The pixel circuit includes a driving transistor, wherein K1 to Km are all greater than K, and the light emission control module includes: a first light emission control transistor, a second light emission control transistor, a first auxiliary light emission control transistor, and a second auxiliary light emission control transistor, and the light emission control signal includes a first sub-light emission control signal and a second sub-light emission control signal; The first terminal of the first light-emitting control transistor and the first terminal of the first auxiliary light-emitting control transistor are electrically connected and connected to a power supply voltage. The second terminal of the first light-emitting control transistor and the second terminal of the first auxiliary light-emitting transistor are electrically connected and connected to the first terminal of the driving transistor. The first terminal of the second light-emitting control transistor and the first terminal of the second auxiliary light-emitting control transistor are electrically connected and electrically connected to the second terminal of the driving transistor. The second terminal of the second light-emitting control transistor and the second terminal of the second auxiliary light-emitting control transistor are electrically connected and electrically connected to the light-emitting element. The gates of the first light-emitting control transistor and the second light-emitting control transistor are connected to the first sub-light-emitting control signal. The gates of the first auxiliary light-emitting control transistor and the second auxiliary light-emitting control transistor are connected to the second sub-light-emitting control signal. Specifically, during the first brightness stage and the second brightness stage, the enabling of the light emission control signal is the enabling of the first sub-light emission control signal; and during the brightness transition stage, the enabling of the light emission control signal is the superposition of the enabling of the first sub-light emission control signal and the enabling of the second sub-light emission control signal.

19. A driving method for a display panel, characterized in that, The driving method for driving the display panel according to any one of claims 1-18 includes: During the process of the display panel switching from the first operating frequency to the second operating frequency, the process includes a first brightness stage, a brightness transition stage, and a second brightness stage performed sequentially; wherein... The enable duration of the data control signal is the same in both the first brightness stage and the second brightness stage; The enable duration of the data control signal is different during the brightness transition phase compared to the first and second brightness phases, such that, under the same grayscale conditions, the brightness of the display panel during the brightness transition phase is between the brightness of the display panel during the first and second brightness phases.

20. A display device, characterized in that, The display device includes the display panel as described in any one of claims 1-18.

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