Display panel and display device

Abstract

The invention provides a display panel and a display device. The compensation precision of low-frequency first-frame display brightness of a display picture in different frequency switching scenes can be improved, the compensation effect is improved, the splash screen phenomenon in the frequency switching process of the display picture is inhibited, and the stability of the display picture is improved. The picture display process of the display panel comprises a current frame and a first to-be-displayed frame, the display time of the current frame is earlier than the display time of the first to-be-displayed frame, the refresh rate of the current frame is a first refresh rate, and the refresh rate of the first to-be-displayed frame is a second refresh rate; under the condition that the first refresh rate and the second refresh rate are not equal and both the first refresh rate and the second refresh rate are smaller than a preset low-frequency refresh rate, the picture display process of the display panel further comprises an insertion frame, the display time of the insertion frame is located between the current frame and the first frame to be displayed, and the refresh rate of the insertion frame is larger than or equal to a preset high-frequency refresh rate; wherein the high-frequency preset refresh rate is greater than the low-frequency preset refresh rate.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of display technology, and in particular, to a display panel and a display device. Background Art

[0002] With the advancement and development of display technology, the requirements for the visual effects and picture quality of display panels are gradually increasing. In the process of the refresh rate of the display panel switching from high frequency to low frequency, the device state of the driving transistor changes greatly, causing the driving transistor to be in a negative bias state when the low-frequency first frame is displayed. As a result, the display brightness of the low-frequency first frame is reduced, and the display brightness of the low-frequency second frame is gradually restored, resulting in a difference between the display brightness of the low-frequency first frame of the display and the steady-state brightness of the display, affecting the stability of the display and causing screen flickering. Summary of the invention

[0003] Based on this, the embodiments of the present application provide a display panel and a display device, which can improve the compensation accuracy of the low-frequency first frame display brightness of the display picture in different frequency switching scenarios, improve the compensation effect, suppress the screen flickering phenomenon during the frequency switching process of the display picture, improve the stability of the display picture, and improve the display effect and display quality of the display panel.

[0004] According to a first aspect of an embodiment of the present application, a display panel is provided, wherein a picture display process of the display panel includes a current frame and a first frame to be displayed, wherein a display time of the current frame is earlier than a display time of the first frame to be displayed, a refresh rate of the current frame is a first refresh rate, and a refresh rate of the first frame to be displayed is a second refresh rate;

[0005] In the case where the first refresh rate and the second refresh rate are not equal, and both the first refresh rate and the second refresh rate are less than the preset low-frequency refresh rate, the picture display process of the display panel further includes inserting a frame, the display time of the inserted frame is between the current frame and the first frame to be displayed, and the refresh rate of the inserted frame is greater than or equal to the preset high-frequency refresh rate;

[0006] The high-frequency preset refresh rate is greater than the low-frequency preset refresh rate.

[0007] According to a second aspect of an embodiment of the present application, a display panel is provided, including a display driver chip and a pixel circuit;

[0008] The display driver chip is used to provide a driving signal for the pixel circuit, wherein the display driver chip is configured as follows:

[0009] Obtaining a first refresh rate for displaying a current frame and a second refresh rate for displaying a first frame to be displayed by the display panel, wherein a display time of the current frame is earlier than a display time of the first frame to be displayed;

[0010] When the first refresh rate and the second refresh rate are not equal, and both are lower than the preset low-frequency refresh rate, a driving signal is provided to the pixel circuit so that the pixel circuit drives the display screen to display an inserted frame according to the driving signal, and the display time of the inserted frame is between the current frame and the first frame to be displayed, and the refresh rate of the inserted frame is greater than or equal to the preset high-frequency refresh rate.

[0011] According to a third aspect of the embodiments of the present application, a display device is provided, including:

[0012] A display panel as described in any one of the first aspects above.

[0013] The embodiment of the present application provides a display panel and a display device, in which, when the first refresh rate of the current frame and the second refresh rate of the first frame to be displayed are not equal, and the first refresh rate and the second refresh rate are both less than the preset low-frequency refresh rate, an insertion frame with a refresh rate greater than or equal to the preset high-frequency refresh rate is inserted between the current frame and the first frame to be displayed, wherein the preset high-frequency refresh rate is greater than the low-frequency preset refresh rate. By inserting a high-frequency insertion frame between two low-frequency frames that need to be mutually switched, the refresh rate difference between the first frame to be displayed and the insertion frame of the previous frame can be increased, and further, the refresh rate difference between the first frame to be displayed and the insertion frame can be made close to the refresh rate difference corresponding to the preset compensation value of the low-frequency first frame of the preset display panel. Therefore, when display images with different refresh rates are mutually switched and the same compensation signal is used for brightness compensation, the high-frequency compensation signal directly cuts the low-frequency compensation signal in the low-frequency mutual switching process is avoided, the over-compensation risk in the brightness compensation process is reduced, and the flickering of the first frame to be displayed after switching is avoided, the stability of the display image is improved, and the display effect and display quality of the display panel are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0015] FIG1 is a schematic timing diagram of a display panel provided in an embodiment of the present application;

[0016] FIG. 2 is a diagram of brightness data of a related display panel before improvement in the first frame provided by an embodiment of the present application;

[0017] FIG3 is a schematic timing diagram of a related display panel provided in an embodiment of the present application;

[0018] FIG4 is a diagram of brightness data of a display panel after improvement in the first frame according to an embodiment of the present application;

[0019] FIG5 is a luminance data diagram of an over-compensation phenomenon after improvement of the first frame of a related display panel provided by an embodiment of the present application;

[0020] FIG6 is a schematic timing diagram of another display panel provided in an embodiment of the present application;

[0021] FIG. 7 is a schematic timing diagram of another display panel provided in an embodiment of the present application;

[0022] FIG8 is a schematic timing diagram of another display panel provided in an embodiment of the present application;

[0023] FIG9 is a schematic timing diagram of a display panel provided in an embodiment of the present application;

[0024] FIG10 is a schematic timing diagram of another display panel provided in an embodiment of the present application;

[0025] FIG11 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

[0026] FIG12 is a schematic structural diagram of a pixel circuit of a display panel provided in an embodiment of the present application;

[0027] FIG. 13 is a schematic structural diagram of a display device provided in an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 100-display driver chip; 200-pixel circuit; 1000-display panel. DETAILED DESCRIPTION

[0030] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0032] It should be understood that when an element or layer is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers, doping types and / or parts, these elements, components, regions, layers, doping types and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, doping type or part from another element, component, region, layer, doping type or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer, doping type or portion discussed below may be represented as a second element, component, region, layer or portion; for example, the first doping type may be referred to as the second doping type, and similarly, the second doping type may be referred to as the first doping type; the first doping type and the second doping type are different doping types, for example, the first doping type may be P-type and the second doping type may be N-type, or the first doping type may be N-type and the second doping type may be P-type.

[0033] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0034] When used herein, the singular forms "a", "an" and " / the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof. At the same time, in this specification, the term "and / or" includes any and all combinations of the relevant listed items.

[0035] It should be noted that with the advancement and development of display technology, the requirements for the visual effects and picture quality of display panels are gradually increasing. In the process of the refresh rate of the display panel switching from high frequency to low frequency, the device state of the driving transistor changes greatly, resulting in the driving transistor being in a negative bias state when the low-frequency first frame is displayed. As a result, the display brightness of the low-frequency first frame is reduced, and the display brightness of the low-frequency second frame is gradually restored, resulting in a difference between the display brightness of the low-frequency first frame of the display and the steady-state brightness of the display, affecting the stability of the display and causing a flickering screen problem.

[0036] In a traditional display panel, the display brightness of the low-frequency first frame of the display image is usually compensated by changing the bias voltage signal and the reference voltage signal of the low-frequency first frame image, thereby reducing the brightness difference between the display brightness of the low-frequency first frame of the display image and the steady-state brightness of the display image to improve the stability of the display image.

[0037] However, conventional display panels usually use the same preset compensation value during frequency cutting processes of different amplitudes, and the preset compensation value is usually determined based on the maximum refresh rate and the minimum refresh rate of the display panel refresh rate. Therefore, when the difference in refresh rate between the two frames before and after the display panel frequency cutting is small, using the preset compensation value for brightness compensation will cause over-compensation of the low-frequency first frame after the frequency cutting, causing the display brightness of the low-frequency first frame of the display to be greater than the steady-state brightness, further exacerbating the screen flickering problem of the display, affecting the stability of the display, and affecting the display effect and display quality of the display panel. Adjusting the compensation signal based on the difference in refresh rate between the two frames before and after the frequency cutting will increase the computing power required for the display panel to cut the frequency, further increasing the power consumption of the display panel.

[0038] In view of this, it is a technical problem that needs to be solved urgently to propose a display panel that can improve the stability of low-frequency image switching and reduce the difficulty of display image brightness compensation.

[0039] As shown in Figure 1, the first aspect of an embodiment of the present application provides a display panel, wherein the picture display process of the display panel includes a current frame f1 and a first frame to be displayed f2, wherein the display time of the current frame f1 precedes the display time of the first frame f2 to be displayed, the refresh rate of the current frame f1 is the first refresh rate, and the refresh rate of the first frame f2 to be displayed is the second refresh rate; when the first refresh rate and the second refresh rate are not equal, and the first refresh rate and the second refresh rate are both lower than the preset low-frequency refresh rate, the picture display process of the display panel also includes an inserted frame f0, the display time of the inserted frame f0 is between the current frame f1 and the first frame f2 to be displayed, and the refresh rate of the inserted frame f0 is greater than or equal to the preset high-frequency refresh rate; wherein the high-frequency preset refresh rate is greater than the low-frequency preset refresh rate.

[0040] It should be noted that the TE (Tearing Effect) signal in Figure 1 can prevent the tearing problem when the picture is refreshed during the image display process. At the rising edge of the TE signal, or after the TE signal is detected to be in a high level state, the next frame of image data can be sent to the display driver chip to drive the display of the next frame of the display screen. Therefore, the TE signal interval represented by the dotted line in the diagram of this application represents the display cycle of a frame of display screen. The larger the display cycle, the lower the refresh rate of the frame of the picture. Conversely, it represents a higher refresh rate of the frame of the picture.

[0041] Exemplarily, the preset low-frequency refresh rate and the preset high-frequency refresh rate can be determined according to the switchable refresh rate of the display panel. For example, for a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 60 Hz, 20 Hz, 10 Hz, or 1 Hz, the preset low-frequency refresh rate can be 60 Hz, and the preset high-frequency refresh rate can be 120 Hz, 480 Hz, or higher. For a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 90 Hz, 60 Hz, 20 Hz, or 10 Hz, the preset low-frequency refresh rate can be 60 Hz, and the preset high-frequency refresh rate can be 90 Hz, 480 Hz, or higher.

[0042] As shown in Figure 2, the blue curve of the data graph represents the actual brightness of the display screen, the red curve represents the weighted brightness of the display screen obtained after weighted fitting filtering and other processing are performed on the actual brightness, the left vertical axis of the data graph represents the actual brightness value of the display screen, in nits, and the right vertical axis represents the weighted brightness value of the display screen, in nits. According to Figure 2, it can be seen that in the relevant display panel, when the display screen switches from high frequency to low frequency, after the high-frequency screen in a steady state is displayed, the low-frequency screen will first display a low-frequency first frame screen with a brightness lower than the steady-state brightness of the display screen, and starting from the second frame of the low-frequency screen, the display brightness reaches the steady-state brightness.

[0043] As shown in FIG3 , in the relevant display panel, for the current frame f1 and the first frame to be displayed f2 whose first refresh rate and the second refresh rate are not equal and whose first refresh rate and the second refresh rate are both lower than the preset low-frequency refresh rate, a preset compensation signal is usually used to compensate the first frame to be displayed f2. Wherein, DVH represents the bias voltage signal of the display screen, DVHA represents the bias voltage signal of the display screen in the non-display stage, or represents the bias voltage signal corresponding to the display screen at a high-frequency refresh rate, DVHB represents the bias voltage signal corresponding to the display screen at a low-frequency refresh rate, and DVHC represents the bias voltage signal corresponding to the display screen when the refresh rate is switched. Vref2 represents the reference voltage signal of the display screen, VarA represents the reference voltage signal of the display screen in the non-display stage, or represents the reference voltage signal corresponding to the display screen at a high-frequency refresh rate, VarB represents the reference voltage signal corresponding to the display screen at a low-frequency refresh rate, and VarC represents the reference voltage signal corresponding to the display screen when the refresh rate is switched. It should be noted that DVHC and VarC are pre-set and are used to compensate the first frame display image corresponding to the low-frequency refresh rate when the display image is switched directly from a high-frequency refresh rate to a low-frequency refresh rate, so as to reduce the brightness difference between the first frame low-frequency display image and the low-frequency display image in a steady state.

[0044] As shown in FIG4 , in the relevant display panel, the blue curve of the data graph represents the actual brightness of the display screen, the red curve represents the weighted brightness of the display screen obtained after weighted fitting filtering and other processing are performed on the actual brightness, the left vertical axis represents the actual brightness value of the display screen, in nits, and the right vertical axis represents the weighted brightness value of the display screen, in nits. It can be seen from FIG4 that in the relevant display panel, when the display screen is directly switched from high frequency to low frequency, after the high-frequency screen in a steady state is displayed, a preset compensation signal is applied to the low-frequency first frame screen to compensate for the low-frequency first frame screen, so that the brightness of the compensated low-frequency first frame screen can be close to the steady-state brightness of the low-frequency display screen, and the brightness difference between the brightness of the low-frequency first frame screen and the steady-state brightness can be reduced.

[0045] It should be noted that since the compensation signals DVHC and VarC are set according to the application scenario of directly switching the high frequency to the low frequency of the display screen, when the low-frequency current frame f1 is switched to the low-frequency first frame to be displayed f2, using the same compensation signal will cause the first frame to be displayed f2 to be over-compensated, causing the brightness of the first frame to be displayed f2 to be greater than the brightness of the display screen with the same refresh rate in the steady state, further aggravating the flicker problem of the display screen.

[0046] As shown in FIG5 , in the relevant display panel, the blue curve of the data graph represents the actual brightness of the display screen, the red curve represents the weighted brightness of the display screen obtained after weighted fitting filtering and other processing are performed on the actual brightness, the left vertical axis represents the actual brightness value of the display screen, and the unit is nit, and the right vertical axis represents the weighted brightness value of the display screen, and the unit is nit. According to FIG5 , it can be seen that in the relevant display panel, when the display screen switches from the first low frequency to the second low frequency, after the steady-state picture of the first low frequency in a steady state is displayed, the first frame of the second low frequency is applied with the same preset compensation signal as the high frequency directly cut low frequency to compensate for the first frame of the second low frequency, which will cause the brightness of the first frame of the second low frequency to be over-compensated, so that the brightness of the first frame of the second low frequency is higher than the steady-state brightness of the display screen, further increasing the brightness difference between the brightness of the first frame of the second low frequency and the steady-state brightness.

[0047] The display panel provided by the embodiment of the present application, when the first refresh rate of the current frame f1 and the second refresh rate of the first frame to be displayed f0 are not equal, and the first refresh rate and the second refresh rate are both less than the preset low-frequency refresh rate, an insertion frame f0 with a refresh rate greater than or equal to the preset high-frequency refresh rate is inserted between the current frame f1 and the first frame to be displayed f2, wherein the preset high-frequency refresh rate is greater than the low-frequency preset refresh rate. By inserting a high-frequency insertion frame f0 between two low-frequency frames that need to be mutually cut, the refresh rate difference between the first frame to be displayed f2 and the insertion frame f0 of the previous frame can be increased, and further, the refresh rate difference between the first frame to be displayed f2 and the insertion frame f0 can be made close to the refresh rate difference corresponding to the preset compensation value of the low-frequency first frame of the preset display panel. Therefore, when display pictures with different refresh rates are mutually cut and the same compensation signal is used for brightness compensation, the high-frequency direct cutting of the low-frequency compensation signal can be avoided in the process of low-frequency mutual cutting, the risk of over-compensation in the brightness compensation process is reduced, and the flickering of the first frame to be displayed after switching is avoided, the stability of the display picture is improved, and the display effect and display quality of the display panel are improved.

[0048] As shown in FIG. 1 , FIG. 6 and FIG. 7 , in some implementations, the insertion frame f0 includes one.

[0049] It should be noted that, as shown in FIG7 , before the display time of the current frame f1, the display screen also includes a high-frequency frame f3' and a previous frame f1', wherein the refresh rate of the high-frequency frame f3' is greater than the preset high-frequency refresh rate, and the refresh rate of the previous frame f1' is equal to the first refresh rate. After the display time of the first frame to be displayed f2, the display screen also includes a subsequent frame f3, wherein the refresh rate of the subsequent frame f3 is equal to the second refresh rate.

[0050] In the display screen switching process shown in FIG7 , when the display screen switches from the high-frequency frame f3' to the previous frame f1', the refresh rate difference between the two frames is large, and brightness compensation can be performed through DVHC and VarC without causing over-compensation problems. After the previous frame f1' is displayed, when the display screen switches from the previous frame f1' to the current frame f1, the display of the current frame f1 is adjusted to a standard steady-state display through DVHB and VarB. In the case of setting an inserted frame f0, when the display screen switches from the current frame f1 to the inserted frame f0, it can be driven by DVHA and VarA without compensating for the inserted frame f0. When the display screen switches from the inserted frame f0 to the first frame to be displayed f2, the refresh rate difference between the two frames is large, and brightness compensation can be performed again through DVHC and VarC. After the first frame to be displayed f2 is displayed, when the display screen switches from the first frame to be displayed f2 to the next frame f3, the display of the next frame f3 is adjusted to a standard steady-state display through DVHB and VarB.

[0051] The embodiments of the present application provide a display panel and a display device. By inserting a high-frequency insertion frame f0 between two low-frequency frames that need to be cut, the display time of the insertion frame f0 can be further shortened, the power consumption required for displaying the high-frequency insertion frame f0 can be reduced, the display effect of the display picture can be further improved, and the display performance of the display panel can be improved.

[0052] As shown in FIG. 8 , in some implementations, the insertion frame f0 includes multiple ones.

[0053] It should be noted that the number of inserted frames f0 can be 3. The longer the display time of the inserted frame f0 is, the greater the display power consumption of the display panel is, so the number of inserted frames f0 needs to be reduced. The refresh rate of the inserted frame f0 is relatively high. When multiple inserted frames f0 are inserted, the total display time of all inserted frames f0 is still relatively short, and the impact on the display effect of the display screen is relatively small. Therefore, multiple inserted frames f0 can be inserted between the current frame f1 and the first frame to be displayed f2.

[0054] The display panel provided by the embodiment of the present application can realize the display transition between the current frame f1 and the inserted frame f0 by increasing the number of inserted frames f0, avoiding the problem of unstable display when the low-frequency current frame f1 switches to the high-frequency inserted frame f0, thereby improving the stability of the display of the inserted frame f0, so that the first frame to be displayed f2 can be displayed after the inserted frame f0 is stable. The brightness uniformity and stability of the display panel can be further improved, the flicker risk of the displayed picture can be reduced, and the display effect and display quality of the display panel can be improved.

[0055] In some embodiments, the refresh rates of at least two interpolated frames f0 are equal.

[0056] Exemplarily, the refresh rates of all inserted frames f0 between the current frame f1 and the first frame to be displayed f2 may be equal. For example, for a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 60 Hz, 20 Hz, 10 Hz, or 1 Hz, the refresh rate of the inserted frame f0 may be 120 Hz, 480 Hz, or higher, and the refresh rates of the inserted frames f0 are equal.

[0057] Exemplarily, as shown in FIG9 , the refresh rate of the inserted frame f0 between the current frame f1 and the first frame to be displayed f2 can be increased in a step-by-step manner. As shown in FIG9 , an inserted frame f0, an inserted frame f0' and an inserted frame f0'' are provided between the current frame f1 and the first frame to be displayed f2, wherein the refresh rate of the inserted frame f0'' is greater than that of the inserted frame f0', and the refresh rate of the inserted frame f0' is greater than that of the inserted frame f0. For example, for a display panel having a switchable refresh rate of 480 Hz or higher, 120 Hz, 60 Hz, 20 Hz, 10 Hz, 1 Hz, the refresh rates of the inserted frames f0 can be 90 Hz, 120 Hz, 480 Hz or higher, respectively.

[0058] The display panel provided in the embodiment of the present application can reduce the adjustment frequency of the inserted frame f0, reduce the driving complexity and control difficulty of the inserted frame f0, and further improve the brightness uniformity and stability of the display panel by setting the refresh rates of at least two inserted frames f0 between the current frame f1 and the first frame to be displayed f2 to be equal, and at the same time can avoid over-compensation of the brightness of the display picture caused by different refresh rates of the inserted frames f0, reduce the risk of flickering of the display picture, and improve the display effect and display quality of the display panel.

[0059] In some embodiments, an insertion frame f0 is periodically inserted between the current frame f1 and the first frame to be displayed f2.

[0060] Exemplarily, as shown in FIG8 , a plurality of insertion frames f0 with the same refresh rate can be continuously inserted between the current frame f1 and the first frame to be displayed f2, wherein the insertion period of the insertion frame f0 is the display period of the insertion frame f0. For example, when the refresh rate of the insertion frame f0 is 120 Hz, the display period of the insertion frame f0 includes a non-display phase and a display phase, wherein the non-display phase is used to receive a drive signal, and the display phase is used to drive the light-emitting element to emit light. The different refresh rates of the insertion frames f0 usually indicate that the duration required for the display phase in the display cycle is different, while the duration required for the non-display phase usually does not change with the refresh rate, and the duration required for the non-display phase of the same display panel is usually fixed. According to the content shown in FIG8 , in the insertion frame f0, the non-display phase corresponds to the low-level phase of the TE signal, and the display phase corresponds to the high-level phase of the TE signal.

[0061] Exemplarily, the display periods of the inserted frames f0 may be unequal, so that the refresh rates of the inserted frames f0 are unequal. For example, when multiple inserted frames f0 are periodically inserted between the current frame f1 and the first frame to be displayed f2, and the display periods of the inserted frames f0 are unequal, for a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 60 Hz, 20 Hz, 10 Hz, or 1 Hz, the refresh rates of the inserted frames f0 may be set equal at intervals, for example, the refresh rates of the multiple inserted frames f0 may be set alternately at 120 Hz, 480 Hz, or higher, and for a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 90 Hz, 60 Hz, 20 Hz, or 10 Hz, the refresh rates of the inserted frames f0 may be set equal at intervals, for example, the refresh rates of the multiple inserted frames f0 may be set cyclically at 90 Hz, 120 Hz, 480 Hz, or higher. For example, when multiple inserted frames f0 are periodically inserted between the current frame f1 and the first frame to be displayed f2, and the display periods of each inserted frame f0 are not equal, for a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 60 Hz, 20 Hz, 10 Hz, or 1 Hz, the refresh rates of the multiple inserted frames f0 are set in a step-by-step manner from 120 Hz to 480 Hz or higher; for a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 90 Hz, 60 Hz, 20 Hz, or 10 Hz, the refresh rates of the multiple inserted frames f0 are set in a step-by-step manner from 90 Hz, 120 Hz to 480 Hz or higher.

[0062] The display panel provided in the embodiment of the present application can improve the continuity and smoothness of the displayed picture by periodically inserting the insertion frame f0, thereby improving the stability of the displayed picture, and further improving the display effect and display performance of the display panel.

[0063] In some implementations, the refresh rate of the inserted frame f0 is greater than or equal to 90 Hz.

[0064] For example, for a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 60 Hz, 20 Hz, 10 Hz, or 1 Hz, the refresh rate of the inserted frame f0 may be 120 Hz, 480 Hz, or higher. For a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 90 Hz, 60 Hz, 20 Hz, or 10 Hz, the refresh rate of the inserted frame f0 may be 90 Hz, 120 Hz, 480 Hz, or higher. For a display panel with a switchable refresh rate of 90 Hz, 60 Hz, 20 Hz, 10 Hz, or 1 Hz, the refresh rate of the inserted frame f0 may be 90 Hz.

[0065] The display panel provided in the embodiment of the present application can increase the refresh rate difference between the first frame to be displayed f2 and the inserted frame f0 of the previous frame by setting the refresh rate of the inserted frame f0 to be greater than or equal to 90Hz, and can further make the refresh rate difference between the first frame to be displayed f2 and the inserted frame f0 close to the refresh rate difference corresponding to the preset compensation value of the low-frequency first frame of the preset display panel. Therefore, when display images with different refresh rates are mutually switched and the same compensation signal is used for brightness compensation, it is possible to avoid using a high-frequency direct switching low-frequency compensation signal during the low-frequency mutual switching process, reduce the risk of over-compensation during the brightness compensation process, avoid flickering of the first frame to be displayed after switching, improve the stability of the display image, and improve the display effect and display quality of the display panel.

[0066] As shown in Figures 8 and 10, in some embodiments, the number of inserted frames f0 is negatively correlated with the refresh rate of the inserted frames f0. As shown in Figures 8 and 10, the refresh rate of the inserted frames f0 when the number of inserted frames f0 is 5 frames is less than the refresh rate of the inserted frames f0 when the number of inserted frames f0 is 5 frames.

[0067] For example, when the number of inserted frames f0 is 5, the refresh rate of the inserted frame f0 may be 90 Hz. When the number of inserted frames f0 is 3, the refresh rate of the inserted frame f0 may be 120 Hz. When the number of inserted frames f0 is 1, the refresh rate of the inserted frame f0 may be 480 Hz or higher.

[0068] It should be noted that the greater the refresh rate of the inserted frame f0, the higher the energy consumption required for displaying the inserted frame f0. Therefore, by setting the number of inserted frames f0 to be negatively correlated with the refresh rate of the inserted frame f0, it is convenient to control the number of inserted frames f0, which can reduce the driving difficulty of the inserted frame f0, further reduce the display power consumption of the display panel, improve the stability of the display picture, and further improve the display effect and display quality of the display panel.

[0069] In some embodiments, the frequency difference between the first refresh rate and the second refresh rate is a first frequency difference, wherein the first frequency difference is less than or equal to a preset frequency difference threshold.

[0070] Exemplarily, the preset frequency difference threshold may be determined according to the switchable refresh rate of the display panel. For example, for a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 60 Hz, 20 Hz, 10 Hz, or 1 Hz, the preset frequency difference threshold may be 9 Hz to 59 Hz. For a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 90 Hz, 60 Hz, 20 Hz, or 10 Hz, the preset frequency difference threshold may be 10 Hz to 50 Hz.

[0071] It should be noted that, when the first frequency difference is less than or equal to the preset frequency difference threshold, using the preset compensation signal when switching between the current frame f1 and the first frame to be displayed f2 will aggravate the problem of over-compensation of the brightness of the displayed picture.

[0072] The display panel provided in the embodiment of the present application, by setting the first frequency difference to be less than or equal to a preset frequency difference threshold, can set an inserted frame f0 between the current frame f1 and the first frame f2 to be displayed when the refresh rates of the current frame f1 and the first frame f2 to be displayed are similar, thereby further improving the brightness uniformity and stability when low-frequency display images with similar first frequency differences are switched, reducing the flicker risk of the first frame f2 to be displayed after switching, and improving the display effect and display quality of the display panel.

[0073] In some embodiments, the display panel also includes: a display driver chip, wherein the display driver chip is configured to: when the refresh rate of the inserted frame f0 is not equal to the second refresh rate of the first frame f2 to be displayed, provide a compensation signal to the pixel circuit, so that the pixel circuit drives the display screen to display the first frame f2 to be displayed according to the compensation signal.

[0074] The display panel provided in the embodiment of the present application, when the first refresh rate of the current frame f1 and the second refresh rate of the first frame to be displayed f0 are not equal, provides a compensation signal to the pixel circuit through the display driver chip. In the process of switching between display images with different refresh rates, the display brightness of the first frame after switching can be compensated, thereby improving the brightness uniformity and stability of the display image, reducing the risk of flickering of the display image, and improving the display effect and display quality of the display panel.

[0075] In some embodiments, the compensation signal is determined based on a standard high-frequency refresh rate and a standard low-frequency refresh rate, the standard high-frequency refresh rate is greater than or equal to a preset high-frequency refresh rate, and the standard low-frequency refresh rate is less than a preset low-frequency refresh rate; wherein the first frequency difference is less than the second frequency difference, the first frequency difference is the frequency difference between the first refresh rate and the second refresh rate, and the second frequency difference is the frequency difference between the standard high-frequency refresh rate and the standard low-frequency refresh rate.

[0076] Exemplarily, the standard low-frequency refresh rate and the standard high-frequency refresh rate can be determined according to the switchable refresh rate of the display panel, wherein the standard low-frequency refresh rate and the standard high-frequency refresh rate can be determined according to the lowest refresh rate and the highest refresh rate that the display panel can switch. For example, for a display panel with a switchable refresh rate of 480Hz or higher, 120Hz, 60Hz, 20Hz, 10Hz, 1Hz, the standard low-frequency refresh rate can be 1Hz or 10Hz, and the standard high-frequency refresh rate can be 120Hz, 480Hz or higher. For a display panel with a switchable refresh rate of 480Hz or higher, 120Hz, 90Hz, 60Hz, 20Hz, 10Hz, the standard low-frequency refresh rate can be 10Hz, and the standard high-frequency refresh rate can be 90Hz or 120Hz, 480Hz or higher.

[0077] It should be noted that, for a display panel whose first frequency difference is smaller than the second frequency difference, performing brightness compensation on the first frame f2 to be displayed according to the compensation signal determined by the second frequency difference may cause an over-compensation problem in the first frame f2 to be displayed.

[0078] The display panel provided in the embodiment of the present application, when the first frequency difference is less than the second frequency difference, sets an inserted frame f0 between the current frame f1 and the first frame to be displayed f2, and further performs brightness compensation on the first frame to be displayed f2 through a compensation signal. This can avoid the problem of brightness reduction of the first frame to be displayed f2 during the refresh rate switching process of the display picture, causing the display picture to flicker, thereby improving the brightness uniformity and stability of the display picture and improving the display effect and display performance of the display panel.

[0079] In some implementations, the refresh rate of the interpolated frame f0 is equal to the standard high frequency refresh rate.

[0080] For example, for a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 60 Hz, 20 Hz, 10 Hz, or 1 Hz, the standard high-frequency refresh rate may be 120 Hz or 480 Hz or higher, and the refresh rate of the inserted frame f0 may be 120 Hz, 480 Hz or higher. For a display panel with a switchable refresh rate of 480 Hz or higher, 120 Hz, 90 Hz, 60 Hz, 20 Hz, or 10 Hz, the standard high-frequency refresh rate may be 90 Hz, 120 Hz, or 480 Hz or higher, and the refresh rate of the inserted frame f0 may be 90 Hz, 120 Hz, or 480 Hz or higher.

[0081] The display panel provided in the embodiment of the present application can further increase the frequency difference between the inserted frame f0 and the first frame to be displayed f2 by setting the refresh rate of the inserted frame f0 equal to the standard high-frequency refresh rate, so that the frequency difference between the inserted frame f0 and the first frame to be displayed f2 is closer to the second frequency difference, thereby enhancing the compensation effect of the compensation signal on the first frame to be displayed f2, and further improving the brightness uniformity and stability of the displayed picture, suppressing the flickering problem of the displayed picture, and improving the display effect and display performance of the display panel.

[0082] In some embodiments, the compensation signal is used to adjust at least one of a bias voltage and a reference voltage of the pixel circuit.

[0083] As shown in FIG2 , in the relevant display panel, for high-frequency display images and low-frequency display images with different refresh rates, the threshold voltage Vth of the driving transistor is different during the display process. Therefore, in the process of switching the display image from the high-frequency display image to the low-frequency display image, the threshold voltage Vth of the driving transistor will change, which will cause a negative bias in the driving transistor, and then cause the brightness of the low-frequency first frame display image to decrease, resulting in a pit on the brightness data graph as shown in FIG2 .

[0084] It should be noted that by adjusting the bias voltage, the source voltage of the driving transistor can be adjusted, thereby reducing the gate-source voltage of the driving transistor to weaken the negative bias of the driving transistor, thereby achieving the effect of suppressing the negative bias of the driving transistor, and reducing the brightness reduction of the low-frequency first frame display image, thereby increasing the display brightness of the low-frequency first frame display image, so as to repair the pits that appear on the brightness data graph shown in Figure 2.

[0085] It should be noted that by adjusting the reference voltage, the anode voltage of the light-emitting element can be adjusted. It should be noted that, although adjusting the bias voltage can weaken the negative bias of the driving transistor when the low-frequency first frame is displayed, there is still a brightness difference between the display brightness of the low-frequency first frame after bias voltage compensation and the steady-state brightness. Therefore, by adjusting the reference voltage, the drain voltage of the driving transistor and the reference voltage can be used together to power the light-emitting element, so as to further compensate for the brightness of the low-frequency first frame, so that the steady-state brightness of the low-frequency display picture can reach the target brightness required for the steady state, thereby improving the accuracy of the displayed picture and improving the display effect and display performance of the display panel.

[0086] The display panel provided in the embodiment of the present application can suppress the negative bias of the driving transistor in the pixel circuit by adjusting the bias voltage and reference voltage of the pixel circuit through the compensation signal, can improve the display brightness of the frame image driven by the compensation signal, and can compensate for the steady-state brightness of the display image, thereby improving the accuracy of the display brightness of the frame image after switching. Therefore, when the inserted frame f0 is switched to the first frame to be displayed f2, the flicker risk of the display image can be reduced, the brightness uniformity and stability of the display image can be improved, and the display effect and display performance of the display panel can be improved.

[0087] In some embodiments, when the display panel displays the inserted frame f0, the bias voltage of the pixel circuit is a first bias voltage, and when the display panel displays the first frame to be displayed f2, the reference voltage of the pixel circuit is a second reference voltage; wherein the first bias voltage is greater than the second bias voltage.

[0088] As shown in FIG. 3 and FIG. 6 to FIG. 8 , the first bias voltage is DVHA, and the second bias voltage is DVHC.

[0089] It should be noted that, in the process of switching from the inserted frame f0 to the first frame to be displayed f2, the display screen switches from the high-frequency inserted frame f0 to the low-frequency display screen, which will cause the brightness of the low-frequency first frame screen, the first frame to be displayed f2, to decrease. Therefore, by reducing the bias voltage, the source voltage of the driving transistor can be reduced, thereby reducing the gate-source voltage of the driving transistor, suppressing the negative bias caused by the change in the threshold voltage of the driving transistor, and further improving the display brightness of the first frame to be displayed f2, and reducing the brightness difference between the display brightness of the first frame to be displayed f2 and the steady-state brightness.

[0090] The display panel provided in the embodiment of the present application can suppress the negative bias of the driving transistor in the pixel circuit by setting the first bias voltage greater than the second bias voltage, and can further improve the display brightness of the frame image driven by the compensation signal, thereby reducing the flicker risk of the display image when switching from the inserted frame f0 to the first frame to be displayed f2, improving the brightness uniformity and stability of the display image, and improving the display effect and display performance of the display panel.

[0091] In some embodiments, when the display panel displays the inserted frame f0, the reference voltage of the pixel circuit is the first reference voltage, and when the display panel displays the first frame to be displayed f2, the bias voltage of the pixel circuit is the second bias voltage, and the first reference voltage is less than the second reference voltage.

[0092] As shown in FIG. 3 and FIG. 6 to FIG. 8 , the first reference voltage is VarA, and the second reference voltage is VarC.

[0093] It should be noted that, in the process of switching from the inserted frame f0 to the first frame to be displayed f2, the display screen switches from the high-frequency inserted frame f0 to the low-frequency display screen, which will cause the brightness of the low-frequency first frame screen, the first frame to be displayed f2, to decrease. Therefore, by increasing the reference voltage, the anode voltage of the light-emitting element can be compensated to increase the light-emitting brightness of the light-emitting element, thereby increasing the display brightness of the display screen and reducing the brightness difference between the display brightness of the first frame to be displayed f2 and the steady-state brightness. In addition, when the brightness of the first frame to be displayed f2 is adjusted by the bias voltage and the reference voltage, the reference voltage can further compensate for the brightness adjustment effect of the bias voltage, so that the brightness difference between the display brightness of the first frame to be displayed f2 and the steady-state brightness of the display screen is further reduced, further improving the flickering problem of the display screen.

[0094] The display panel provided in the embodiment of the present application can compensate for the anode voltage of the light-emitting element by setting the first reference voltage to be less than the second reference voltage, and improve the display brightness of the display image by increasing the anode voltage of the light-emitting element. This can reduce the flicker risk of the display image when switching from the inserted frame f0 to the first frame to be displayed f2, improve the brightness uniformity and stability of the display image, and improve the display effect and display performance of the display panel.

[0095] As shown in FIG11 , in a second aspect of an embodiment of the present application, a display panel is provided, comprising a display driver chip 100 and a pixel circuit 200. The display driver chip 100 is used to provide a driving signal for the pixel circuit 200, wherein the display driver chip 100 is configured to: obtain a first refresh rate for displaying a current frame f1 and a second refresh rate for displaying a first frame to be displayed f2 of the display panel, wherein the display time of the current frame f1 precedes the display time of the first frame to be displayed f2; and when the first refresh rate and the second refresh rate are not equal, and the first refresh rate and the second refresh rate are both less than the preset low-frequency refresh rate, provide a driving signal for the pixel circuit 200, so that the pixel circuit 200 drives the display screen to display an inserted frame f0 according to the driving signal, and the display time of the inserted frame f0 is between the current frame f1 and the first frame to be displayed f2, and the refresh rate of the inserted frame f0 is greater than or equal to the preset high-frequency refresh rate.

[0096] Exemplarily, the display panel may include a plurality of pixel circuits 200, and the pixel circuits 200 are used to drive display pixels to light up. Among them, the pixel circuits 200 may include 8T1C pixel circuits.

[0097] In the display panel provided by the embodiment of the present application, when the first refresh rate of the current frame f1 and the second refresh rate of the first frame to be displayed f0 are not equal, and the first refresh rate and the second refresh rate are both less than the preset low-frequency refresh rate, the display driver chip 100 drives the pixel circuit 200 to insert an insertion frame f0 with a refresh rate greater than or equal to the preset high-frequency refresh rate between the current frame f1 and the first frame to be displayed f2, wherein the preset high-frequency refresh rate is greater than the low-frequency preset refresh rate. By inserting a high-frequency insertion frame f0 between two low-frequency frames that need to be cut, the refresh rate difference between the first frame to be displayed f2 and the insertion frame f0 of the previous frame can be increased, and further, the refresh rate difference between the first frame to be displayed f2 and the insertion frame f0 can be made close to the refresh rate difference corresponding to the preset compensation value of the low-frequency first frame of the preset display panel 1000. Therefore, when display images with different refresh rates are switched to each other and the same compensation signal is used for brightness compensation, it is possible to avoid using a high-frequency compensation signal to directly switch to a low-frequency compensation signal during the low-frequency switching process, reduce the risk of over-compensation during the brightness compensation process, avoid flickering in the first frame to be displayed after switching, improve the stability of the displayed image, and improve the display effect and display quality of the display panel 1000.

[0098] In some embodiments, the pixel circuit 200 includes: a driving transistor configured to generate a driving current; a switching transistor configured to transmit a data signal to the source of the driving transistor; a compensation transistor configured to diode-connect the driving transistor; a storage capacitor configured to store a data signal transmitted through the switching transistor and the diode-connected driving transistor; a first initialization transistor configured to provide an initialization voltage to the storage capacitor and the gate of the driving transistor in response to an initialization signal; a first light-emitting control transistor configured to transmit a power supply voltage to the source of the driving transistor in response to a light-emitting signal; a second light-emitting control transistor configured to connect the drain of the driving transistor to a light-emitting element in response to a light-emitting control signal; the light-emitting element is configured to emit light based on the driving current; wherein, at least one of the driving transistor, the switching transistor, the compensation transistor, the initialization transistor, the first light-emitting control transistor and the second light-emitting control transistor is implemented by an N-type metal oxide semiconductor transistor.

[0099] As shown in FIG12 , the pixel circuit 200 may be an 8T1C pixel circuit, specifically comprising: a first transistor M1, a second transistor M2, a third transistor M3, a fourth transistor M4, a fifth transistor M5, a sixth transistor M6, a seventh transistor M7, an eighth transistor M8, a light-emitting element OLED, and a storage capacitor Cst. Among them, the driving transistor is the third transistor M3, the switch transistor is the second transistor M2, the compensation transistor is the fourth transistor M4, the first initialization transistor is the fifth transistor M5, the first light-emitting control transistor is the first transistor M1, and the second light-emitting control transistor is the sixth transistor M6.

[0100] Exemplarily, all transistors in the pixel circuit 200 may be implemented by N-type metal oxide semiconductor transistors, or may be implemented by P-type metal oxide semiconductor transistors, which is not specifically limited here.

[0101] As shown in FIG12 , one end of the storage capacitor Cst is connected to the first power supply voltage PVDD, and the other end of the storage capacitor Cst is connected between the gate end of the third transistor M3 and the second end of the fifth transistor M5. The anode of the light-emitting element OLED is electrically connected to the second end of the sixth transistor M6, and the cathode of the light-emitting element OLED is connected to the second power supply voltage PVEE. The first end of the first transistor M1 is connected to the first power supply voltage PVDD, the gate end of the first transistor M1 is connected to the lighting signal Emit, and the second end of the first transistor M1 is electrically connected to the first end of the third transistor M3. The first end of the second transistor M2 is connected to the data signal Vdata, the gate end of the second transistor M2 is connected to the scan signal SP, and the second end of the second transistor M2 is connected between the second end of the first transistor M1 and the first end of the third transistor M3. The gate end of the third transistor M3 is electrically connected to the second end of the fifth transistor M5, and the second end of the third transistor M3 is electrically connected to the first end of the sixth transistor M6. The first end of the fourth transistor M4 is electrically connected to the other end of the storage capacitor Cst, the gate end of the fourth transistor M4 is connected to the scan signal S2N, and the second end of the fourth transistor M4 is connected between the second end of the third transistor M3 and the sixth transistor M6. The first end of the fifth transistor M5 is connected to the first reference signal Vref1, the gate end of the fifth transistor M5 is connected to the scan signal S1N, and the second end of the fifth transistor M5 is connected between the other end of the storage capacitor Cst and the first end of the fourth transistor M4. The first end of the sixth transistor M6 is electrically connected to the second end of the third transistor M3, the gate end of the sixth transistor M6 is connected to the lighting signal Emit, and the second end of the sixth transistor M6 is connected to the anode of the light-emitting element OLED. The first end of the seventh transistor M7 is connected to the second reference signal Vref2, the gate end of the seventh transistor M7 is connected to the scan signal SP*, and the second end of the seventh transistor M7 is connected between the second end of the sixth transistor M6 and the anode of the light-emitting element OLED. The first end of the eighth transistor M8 is connected to the bias voltage signal DVH, the gate end of the eighth transistor M8 is connected to the scan signal SP*, and the second end of the eighth transistor M8 is connected between the second end of the first transistor M1 and the first end of the third transistor M3.

[0102] In the driving process of the pixel circuit 200 shown in FIG12 , the scan signal S1N is used to control the conduction and cutoff of the fifth transistor M5. When the fifth transistor M5 is turned on, the fifth transistor M5 is used to write the first reference signal Vref1 to the gate terminal of the third transistor M3 to reset the first node N1. The scan signal S2N is used to control the conduction and cutoff of the fourth transistor M4. When the fourth transistor M4 is turned on, the fourth transistor M4 is used to perform threshold voltage compensation on the third transistor M3. The scan signal SP is used to control the conduction and cutoff of the second transistor M2. When the second transistor M2 is turned on, the data signal Vdata is written to the first end of the third transistor M3. The scan signal SP is used to control the conduction and cutoff of the seventh transistor M7 and the eighth transistor M8. When the seventh transistor M7 is turned on, the second reference signal Vref2 is written to the anode of the light-emitting element OLED to reset the anode voltage of the light-emitting element OLED. When the eighth transistor M8 is turned on, the bias voltage signal DVH is written to the eighth transistor M8 to bias the second node N2. The lighting signal Emit is used to control the on and off of the first transistor M1 and the sixth transistor M6. When the first transistor M1 and the sixth transistor M6 are turned on, the first power supply voltage PVDD is written to the anode of the light emitting element OLED to realize light emission of the light emitting element OLED.

[0103] It should be noted that in the pixel circuit 200 shown in FIG12, in the bias adjustment stage, the fourth transistor M4 and the eighth transistor M8 are turned on, the bias voltage signal DVH is transmitted to the third transistor M3 through the eighth transistor M8, and is transmitted to the gate terminal of the third transistor M3 through the fourth transistor M4, so that the first node N1, the second node N2 and the third node N3 can be biased. In the initialization stage, the fifth transistor M5 is turned on, and then the fourth transistor M4 is turned on, the first reference signal Vref1 is adjusted to the gate terminal of the third transistor M3 through the fifth transistor M5, and the third node N3 is adjusted through the fifth transistor M5 and the fourth transistor M4. In the data writing stage, the second transistor M2 and the fourth transistor M4 are turned on, and the data signal Vdata is written to the gate terminal of the third transistor M3 through the second transistor M2 and the fourth transistor M4, and the eighth transistor M8 can bias the second node N2.

[0104] The display panel provided in the embodiment of the present application can reduce the leakage current of the pixel circuit 200 and the display power consumption of the display panel by configuring at least one transistor in the pixel circuit 200 as an N-type metal oxide semiconductor transistor, further improve the leakage problem of the display panel during low-frequency display, improve the accuracy and stability of the displayed image, and improve the display effect and display quality of the display panel.

[0105] In some embodiments, the first initialization transistor and the compensation transistor are implemented by N-type metal oxide semiconductor transistors.

[0106] Exemplarily, the remaining transistors in the pixel circuit 200 may be implemented by P-type metal oxide semiconductor transistors.

[0107] The display panel provided in the embodiment of the present application configures the first initialization transistor and the compensation transistor in the pixel circuit 200 as N-type metal oxide semiconductor transistors, so that the first initialization transistor and the compensation transistor are turned on under the control of a high-level signal, thereby further improving the display effect and display quality of the display panel.

[0108] As shown in FIG. 13 , a third aspect of an embodiment of the present application provides a display device, comprising: a display panel 1000 as described in any one of the first aspects above.

[0109] The display device provided in the embodiment of the present application, when the first refresh rate of the current frame f1 and the second refresh rate of the first frame to be displayed f0 are not equal, and the first refresh rate and the second refresh rate are both less than the preset low-frequency refresh rate, inserts an insert frame f0 with a refresh rate greater than or equal to the preset high-frequency refresh rate between the current frame f1 and the first frame to be displayed f2, wherein the preset high-frequency refresh rate is greater than the low-frequency preset refresh rate. By inserting a high-frequency insert frame f0 between two low-frequency frames that need to be cut, the refresh rate difference between the first frame to be displayed f2 and the insert frame f0 of the previous frame can be increased, and further, the refresh rate difference between the first frame to be displayed f2 and the insert frame f0 can be made close to the refresh rate difference corresponding to the preset compensation value of the low-frequency first frame of the preset display panel 1000. Therefore, when display images with different refresh rates are switched to each other and the same compensation signal is used for brightness compensation, it is possible to avoid using a high-frequency compensation signal to directly switch to a low-frequency compensation signal during the low-frequency switching process, reduce the risk of over-compensation during the brightness compensation process, avoid flickering in the first frame to be displayed after switching, improve the stability of the displayed image, and improve the display effect and display quality of the display panel 1000.

[0110] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0111] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features of the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: The picture display process of the display panel includes a current frame and a first frame to be displayed, wherein the display time of the current frame is earlier than the display time of the first frame to be displayed, the refresh rate of the current frame is a first refresh rate, and the refresh rate of the first frame to be displayed is a second refresh rate; In the case where the first refresh rate and the second refresh rate are not equal, and both the first refresh rate and the second refresh rate are less than the preset low-frequency refresh rate, the picture display process of the display panel further includes inserting a frame, the display time of the inserted frame is between the current frame and the first frame to be displayed, and the refresh rate of the inserted frame is greater than or equal to the preset high-frequency refresh rate; The high-frequency preset refresh rate is greater than the low-frequency preset refresh rate.

2. The display panel according to claim 1, characterized in that: The intervening frame includes one.

3. The display panel according to claim 1, characterized in that: The insertion frame includes a plurality of frames.

4. The display panel according to claim 3, characterized in that: The refresh rates of at least two of the inserted frames are equal.

5. The display panel according to claim 3, characterized in that: The insertion frame is periodically inserted between the current frame and the first frame to be displayed.

6. The display panel according to claim 1, characterized in that: The refresh rate of the inserted frame is greater than or equal to 90 Hz.

7. The display panel according to claim 3, characterized in that: The number of the inserted frames is negatively correlated with the refresh rate of the inserted frames.

8. The display panel according to claim 1, characterized in that: A frequency difference between the first refresh rate and the second refresh rate is a first frequency difference, wherein the first frequency difference is less than or equal to a preset frequency difference threshold.

9. The display panel according to claim 1, characterized in that: Also includes: Display driver chip, wherein the display driver chip is configured as: When the refresh rate of the inserted frame is not equal to the second refresh rate of the first frame to be displayed, a compensation signal is provided to the pixel circuit so that the pixel circuit drives a display screen to display the first frame to be displayed according to the compensation signal.

10. The display panel according to claim 9, characterized in that: The compensation signal is determined according to a standard high-frequency refresh rate and a standard low-frequency refresh rate, wherein the standard high-frequency refresh rate is greater than or equal to a preset high-frequency refresh rate, and the standard low-frequency refresh rate is less than the preset low-frequency refresh rate; Among them, the first frequency difference is smaller than the second frequency difference, the first frequency difference is the frequency difference between the first refresh rate and the second refresh rate, and the second frequency difference is the frequency difference between the standard high frequency refresh rate and the standard low frequency refresh rate.

11. The display panel according to claim 10, characterized in that: The refresh rate of the inserted frame is equal to the standard high frequency refresh rate.

12. The display panel according to claim 9, characterized in that: The compensation signal is used to adjust at least one of a bias voltage and a reference voltage of the pixel circuit.

13. The display panel according to claim 12, characterized in that: When the display panel displays the inserted frame, the bias voltage of the pixel circuit is a first bias voltage, and the reference voltage of the pixel circuit is a first reference voltage; when the display panel displays the first frame to be displayed, the bias voltage of the pixel circuit is a second bias voltage, and the reference voltage of the pixel circuit is a second reference voltage; Wherein, the first bias voltage is greater than the second bias voltage; and / or, The first reference voltage is lower than the second reference voltage.

14. A display panel, characterized in that: Including display driver chip and pixel circuit; The display driver chip is used to provide a driving signal for the pixel circuit, wherein the display driver chip is configured as follows: Obtaining a first refresh rate for displaying a current frame and a second refresh rate for displaying a first frame to be displayed by the display panel, wherein a display time of the current frame is earlier than a display time of the first frame to be displayed; When the first refresh rate and the second refresh rate are not equal, and both are lower than the preset low-frequency refresh rate, a driving signal is provided to the pixel circuit so that the pixel circuit drives the display screen to display an inserted frame according to the driving signal, and the display time of the inserted frame is between the current frame and the first frame to be displayed, and the refresh rate of the inserted frame is greater than or equal to the preset high-frequency refresh rate.

15. The display panel according to claim 1 or 14, characterized in that: It includes a pixel circuit and a display driver chip, and the pixel circuit includes: a drive transistor configured to generate a drive current; a switching transistor configured to transmit a data signal to a source of the driving transistor; a compensation transistor configured to diode-connect the drive transistor; a storage capacitor configured to store a data signal transmitted by the driving transistor connected through the switching transistor and the diode; a first initialization transistor configured to provide an initialization voltage to the storage capacitor and a gate of the driving transistor in response to an initialization signal; a first light emission control transistor configured to transmit a power supply voltage to a source of the driving transistor in response to a light emission signal; a second light emission control transistor configured to connect the drain of the driving transistor to the light emitting element in response to a light emission control signal; The light emitting element is configured to emit light based on the driving current; Wherein, at least one of the driving transistor, the switching transistor, the compensation transistor, the first initialization transistor, the first light emission control transistor and the second light emission control transistor is implemented by an N-type metal oxide semiconductor transistor.

16. The display panel according to claim 15, characterized in that: The first initialization transistor and the compensation transistor are implemented by N-type metal oxide semiconductor transistors.

17. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 14.

Images