Display panel and driving method thereof

Abstract

The invention discloses a display panel and a driving method thereof, and belongs to the technical field of display. The driving method of the display panel comprises the following steps: dividing a display frame into at least two display subframes, wherein each display subframe comprises a data writing stage and a light emitting stage; in the data writing stage of each display sub-frame, writing data signals into a part of sub-pixels in the display panel; and in the light emitting stage of each display sub-frame, controlling each sub-pixel in the display panel to display according to the corresponding data signal. The embodiment of the invention can improve the splash screen phenomenon and improve the display effect of the display panel.

Description

TECHNICAL FIELD

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

[0002] At present, in a display panel, especially an active-matrix micro light emitting diode (AM Micro-LED) display panel, a pulse width modulation (PWM) driving method can be used to drive a sub-pixel to emit light. Specifically, each sub-pixel includes a pixel circuit and a light emitting device, and the pixel circuit provides a driving current for the light emitting device. In the PWM driving method, the driving time (or pulse width) of the driving current represents the gray scale of the display panel. Specifically, a sweep signal (for example, a triangular wave or a ramp wave) provided externally can be compared with a data signal, and the time for providing the driving current to the light emitting device can be controlled according to the comparison result, so as to control the light emitting time of the light emitting device.

[0003] In the related art, when the PWM driving method is used to drive the pixel circuit, the time for the pixel circuit to drive the light emitting device to emit light accounts for a small proportion in a frame time when the display panel displays a low gray scale brightness, and a flashing screen phenomenon is prone to occur, which affects the display effect of the display panel. SUMMARY

[0004] The present application provides a display panel and a driving method thereof to improve the flashing screen phenomenon and improve the display effect of the display panel.

[0005] In a first aspect, an embodiment of the present application provides a driving method of a display panel, including: dividing one display frame into at least two display sub-frames, the display sub-frames including a data writing phase and a light emitting phase;

[0006] In the data writing phase of each display sub-frame, data signal writing is performed on part of the sub-pixels in the display panel;

[0007] In the light emitting phase of each display sub-frame, each sub-pixel in the display panel is controlled to display according to the corresponding data signal.

[0008] Optionally, the display area of the display panel includes at least two display sub-areas; the number of display sub-frames in the same display frame is the same as the number of display sub-areas;

[0009] In the data writing phase of different display sub-frames in the same display frame, data signal writing is performed on the sub-pixels in different display sub-areas, respectively;

[0010] Preferably, each of the display sub-areas is arranged along a column direction of the display panel.

[0011] Optionally, the sub-pixel comprises a pulse width modulation circuit and a light emitting device, the pulse width modulation circuit is connected to the light emitting device.

[0012] In the data writing stage, a data signal is provided to the pulse width modulation circuit in each of the partial sub-pixels row by row.

[0013] In the light emitting stage, the potential of the sweep signal received by the pulse width modulation circuit in all the sub-pixels in the display panel is monotonously changed, so that each of the pulse width modulation circuits controls the light emitting time of the connected light emitting device according to the received data signal and the sweep signal.

[0014] Preferably, in the light emitting stage, the potential of the sweep signal is monotonously changed within the potential range of the data signal corresponding to the full gray scale.

[0015] Preferably, in different light emitting stages of the same display frame, the slopes of the sweep signals are the same.

[0016] Optionally, the sub-pixel further comprises a light emitting control module connected between the pulse width modulation circuit and the light emitting device.

[0017] The driving method of the display panel further comprises:

[0018] In each of the data writing stages, the light emitting control signal received by the light emitting control module in all the sub-pixels in the display panel is controlled to maintain the off potential of the light emitting control module.

[0019] In each of the light emitting stages, the light emitting control signal received by the light emitting control module in all the sub-pixels in the display panel is controlled to maintain the on potential of the light emitting control module.

[0020] Preferably, in the same display sub-frame, the duration for which the light emitting control signal maintains the off potential of the light emitting control module is greater than or equal to the duration of the data writing stage; and the duration for which the light emitting control signal maintains the on potential of the light emitting control module is greater than or equal to the duration of the light emitting stage.

[0021] Optionally, the pulse width modulation circuit comprises a writing module and a pulse width modulation module; the writing module is connected to the pulse width modulation module, and the pulse width modulation module is connected to the light emitting device.

[0022] The display panel further comprises a scan driving circuit connected to each of the writing modules.

[0023] The display panel further comprises an image data sending module connected to each of the writing modules;

[0024] The driving method of the display panel further comprises:

[0025] In the data writing stage, the image data sending module is controlled to provide data signals required by different rows of sub-pixels to each of the writing modules in the partial sub-pixels in time, and each output signal of the scanning driving circuit corresponding to the partial sub-pixels is controlled to make each of the writing modules in the partial sub-pixels act in turn to transmit the data signals to the pulse width modulation module;

[0026] In the light emitting stage, the image data sending module is controlled to provide the sweep signal to the writing modules in all the sub-pixels in the display panel at the same time, and each output signal of the scanning driving circuit is controlled to make the writing modules of each of the sub-pixels in the display panel transmit the sweep signal to the pulse width modulation module.

[0027] Optionally, each of the display sub-areas contains the same number of rows of sub-pixels;

[0028] In the same display frame, the time length of each of the data writing stages is the same;

[0029] Preferably, the number of the display sub-areas is 2-6;

[0030] Preferably, the number of the display sub-areas is 4.

[0031] In a second aspect, the embodiments of the present application further provide a display panel, comprising a control module and a plurality of sub-pixels; the control module is used to execute the driving method of the display panel provided by any of the embodiments of the present application.

[0032] Optionally, the sub-pixel comprises a pulse width modulation circuit and a light emitting device, the pulse width modulation circuit comprises a writing module and a pulse width modulation module; the pulse width modulation module is connected to the writing module and the light emitting device respectively; the control module comprises a scanning driving circuit and an image data sending module;

[0033] The scanning driving circuit comprises a first scanning driving module and a second scanning driving module; the image data sending module comprises a data signal generating unit and a sweep signal generating unit; the writing module comprises a data writing unit and a sweep writing unit;

[0034] The data writing unit and the sweep writing unit are connected to the pulse width modulation module in the sub-pixel where the writing module is located;

[0035] The first scan driving module is connected with the data writing units and is configured to control on-off states of the data writing units.

[0036] The data signal generating unit is connected with the data writing units and is configured to provide the data signals to the data writing units.

[0037] The second scan driving module is connected with the sweep writing units and is configured to control on-off states of the sweep writing units.

[0038] The sweep signal generating unit is connected with the sweep writing units and is configured to provide the sweep signals to the sweep writing units.

[0039] Preferably, the sub-pixel further comprises a light emitting control module connected between the pulse width modulation circuit and the light emitting device; the pulse width modulation circuit and the light emitting control module jointly control a light emitting time of the light emitting device.

[0040] Preferably, the sub-pixel further comprises a pulse amplitude modulation circuit connected between the pulse width modulation circuit and the light emitting control module and connected with a data voltage; the pulse amplitude modulation circuit is configured to control a driving current transmitted to the light emitting device in the light emitting phase according to the data voltage.

[0041] Optionally, the first scan driving module is multiplexed as the second scan driving module; and the data writing units are multiplexed as the sweep writing units.

[0042] The image data sending module further comprises a switching unit connected with the data signal generating unit, the sweep signal generating unit and the data writing units; the switching unit is configured to control the data signal generating unit and the sweep signal generating unit to be connected with the data writing units in time division; in each data writing phase, the switching unit controls the data signal generating unit to be connected with the data writing units; and in each light emitting phase, the switching unit controls the sweep signal generating unit to be connected with the data writing units.

[0043] Optionally, the display area of the display panel comprises at least two display sub-areas; and the number of the display sub-frames in the same display frame is the same as the number of the display sub-areas.

[0044] The first scan driving module comprises at least two scan driving units corresponding to the at least two display sub-areas; and the scan driving unit comprises a plurality of cascaded shift registers.

[0045] The display panel further comprises at least two starting signal lines, each of which is connected to a first-stage shift register in each of the scan driving units.

[0046] In the data writing stage of each of the display subframes in the same display frame, each of the scan driving units outputs the turn-on potential of the data writing unit to each row of sub-pixels in the display sub-area in which data signals need to be written in the data writing stage under the control of the corresponding starting signal line.

[0047] The display panel driving method provided by the embodiment of the present application divides one display frame into at least two display subframes, writes data signals of part of sub-pixels in the data writing stage of each display subframe, and controls all sub-pixels to display in the light-emitting stage of each display subframe. In this way, the data signal writing process of all sub-pixels can be divided into different data writing stages, so that the data signal output performance requirement of the control module is reduced; and the light-emitting time of the sub-pixels can be divided into the light-emitting stages of different display subframes, so that the flashing frequency of the display panel can be doubled on the basis of ensuring that the proportion of the light-emitting time of the sub-pixels in one frame time remains unchanged, which is beneficial to making the flashing frequency of the display panel exceed the range of human visual perception, thereby improving the flashing phenomenon, especially the flashing phenomenon at a low gray scale, and effectively improving the display effect of the display panel.

[0048] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0050] Figure 1 is a driving timing diagram of a PWM driving method in the related art;

[0051] Figure 2 is a flowchart of a display panel driving method provided by an embodiment of the present application;

[0052] Figure 3 is a driving timing diagram of a display panel provided by an embodiment of the present application;

[0053] Figure 4A partition mode of a display panel and a corresponding driving timing diagram are provided by an embodiment of the present application.

[0054] Figure 5 Another partition mode of a display panel and a corresponding driving timing diagram are provided by an embodiment of the present application.

[0055] Figure 6 Still another partition mode of a display panel and a corresponding driving timing diagram are provided by an embodiment of the present application.

[0056] Figure 7 A structure diagram of a sub-pixel is provided by an embodiment of the present application.

[0057] Figure 8 Another structure diagram of a sub-pixel is provided by an embodiment of the present application.

[0058] Figure 9 Still another structure diagram of a sub-pixel is provided by an embodiment of the present application.

[0059] Figure 10 A structure diagram of a write module is provided by an embodiment of the present application.

[0060] Figure 11 A structure diagram of a display panel is provided by an embodiment of the present application.

[0061] Figure 12 Another driving timing diagram of a display panel is provided by an embodiment of the present application.

[0062] Figure 13 Another structure diagram of a write module is provided by an embodiment of the present application.

[0063] Figure 14 Another structure diagram of a display panel is provided by an embodiment of the present application.

[0064] Figure 15 Still another structure diagram of a display panel is provided by an embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0066] It should be noted that the terms "first", "second", and the like in the description and in the claims of the application and in the above-described drawings are used only for distinguishing between similar objects and do not necessarily have to describe a specific order or sequence. It is to be understood that the data thus used can be interchanged, where appropriate, so that the embodiments of the application described herein can be carried out in other than the order shown or described herein. Furthermore, the terms "comprising" and "including" and any variations thereof are intended to cover a non-exclusive inclusion.

[0067] As described in the background, under the PWM driving method, the display panel is prone to have the flashing screen problem. The reasons for the problem will be briefly described below. Exemplarily, the sub-pixel of the display panel includes a pixel circuit and a light emitting device, and the pixel circuit includes an analog PWM driving part. The analog PWM driving part is connected to a data signal and a sweep signal. The analog PWM driving part is equivalent to providing a "voltage comparator" function, which controls the light emitting time of the light emitting device by comparing the potential size of the data signal and the sweep signal. For example, when the sweep signal is greater than the data signal, the light emitting device is controlled to emit light, and when the potential of the sweep signal decreases from high to low and is less than the potential of the data signal, the light emitting device is controlled to stop emitting light. Figure 1 is a driving timing diagram of a PWM driving method in the related art. Referring to Figure 1 The data signal Data_t provided to the display panel is represented by a dotted shaded part, and the sweep signal Sweep provided to the display panel is represented by a solid line.

[0068] Specifically, one display frame F of the display panel can include: a full-screen data writing stage T1 and a full-screen light emitting stage T2. In the full-screen data writing stage T1, the writing of the corresponding data signal Data_t is performed on all sub-pixels in the display panel, for example, the data writing is performed row by row. In the full-screen light emitting stage T2, all sub-pixels in the display panel are controlled to display, and the sweep signal Sweep starts to sweep in the full-screen light emitting stage T2, Figure 1The sweep signal Sweep is exemplarily shown as a ramp signal. In the stage where the sweep signal Sweep is greater than the data signal Data_t, the pixel circuit controls the light emitting device to emit light. Among them, different display gray scales correspond to different potential data signals Data_t, so as to control the light emitting time length of different sub-pixels based on the same sweep signal Sweep, thereby controlling the display gray scale that can be perceived by the human eye. Exemplarily, the shorter the time when the sweep signal Sweep is greater than the data signal Data_t, the shorter the light emitting time of the light emitting device of the corresponding sub-pixel in a frame, and the smaller the display gray scale. For example, the maximum display gray scale is 255, when displaying 255 gray scales, the light emitting time length TL255 of the light emitting device can occupy the entire screen light emitting stage T2; when displaying a low gray scale, for example, displaying 32 gray scales, the light emitting time length TL32 of the light emitting device can only occupy 32 / 255 of the entire screen light emitting stage T2, and the light emitting device is in a non-light emitting time for most of the time, which is easy to cause obvious screen flickering phenomenon.

[0069] To solve the above problems, the embodiment of the present application provides a display panel driving method, which can be realized based on a control module in the display panel. In the driving method, one display frame can be divided into at least two display sub-frames, and each display sub-frame includes a data writing stage and a light emitting stage. Figure 2 is a flow diagram of a display panel driving method provided by the embodiment of the present application. Referring to Figure 2 , the method includes the following steps:

[0070] S110, in the data writing stage of each display sub-frame, data signal writing is performed on part of the sub-pixels in the display panel.

[0071] Among them, the sub-pixels on which data signal writing is performed in all display sub-frames in one display frame cover all sub-pixels in the display panel, so that data refreshing of all sub-pixels can be realized in time in one display frame, and the display effect is ensured. Exemplarily, the sub-pixels on which data signal writing is performed in different display sub-frames of the same display frame can be repeated or not repeated at all, which can be set according to actual needs. Among them, the less the sub-pixels on which data signal writing is required in each data writing stage, the lower the output capacity requirement of the control module. Exemplarily, the number of times of data signal writing of each sub-pixel in the same display frame can be set to be the same, so as to ensure the consistency of display of each sub-pixel. For example, the sub-pixels on which data signal writing is performed in different display sub-frames of the same display frame can be set to not be repeated at all, and each sub-pixel performs data signal writing once in the same display frame, so as to minimize the number of sub-pixels on which data signal writing is required in each data writing stage, shorten the time of each data writing stage, improve the proportion of the light emitting stage in the frame time, or in other words, improve the duty cycle of the light emitting stage, so as to improve the screen flickering phenomenon.

[0072] S120, in the light-emitting phase of each display sub-frame, control each sub-pixel in the display panel to display according to the corresponding data signal.

[0073] In the light-emitting phase of each display sub-frame, all sub-pixels are controlled to display, that is, full-screen display. In this way, by dividing one display frame into multiple display sub-frames, multiple data writing phases and multiple light-emitting phases appear alternately in one display frame, and the data writing phase is in the non-light-emitting phase. The embodiment of the present application is equivalent to dispersing the light-emitting time of each sub-pixel in a frame into the light-emitting phases of multiple display sub-frames, which can multiply the flash screen frequency of the display panel in one frame time, which is beneficial to make the actual flash screen frequency of the display panel exceed the perception range of the human eye, thereby improving the flash screen phenomenon.

[0074] Exemplarily, Figure 3 is a driving timing diagram of a display panel provided by an embodiment of the present application, referring to Figure 3 , still filled with dot-shaped shadows to represent the data signal Data_t, and with solid lines to represent the sweep signal Sweep, exemplarily, one display frame F includes four display sub-frames, FZ1, FZ2, FZ3 and FZ4, which include four data writing phases, Td1, Td2, Td3 and Td4, in turn, and four light-emitting phases, Ts1, Ts2, Ts3 and Ts4, in turn. Then, if the maximum display gray scale is 255, when displaying 255 gray scale, the light-emitting time of the sub-pixel can occupy the entire length of the four light-emitting phases; if displaying n gray scale, 0 < n < 255, the light-emitting time of the sub-pixel in each light-emitting phase can occupy n / 255 of the light-emitting phase, which is equivalent to distributing the continuous light-emitting time in the full-screen light-emitting phase T2 in the related art to multiple (4 in this case) light-emitting phases, which is equivalent to multiplying the flash screen frequency of the display panel by multiple (4 in this case), so as to prevent the flash screen from being perceived by the human eye. For example, when the refresh frequency of the display panel is 60Hz, the flash screen frequency is equivalent to being increased to 240Hz, which exceeds the perception range of the human eye, which can effectively improve the flash screen phenomenon of the display panel. Especially when displaying low gray scale, the proportion of the light-emitting time of the sub-pixel to the frame time is unchanged, and the flash screen frequency is multiplied to effectively improve the flash screen phenomenon; and the light-emitting duration in each light-emitting phase is reduced, which can reduce the degree of change in light-emitting brightness caused by factors such as leakage in the pixel circuit, characteristic drift of the transistor, and characteristic drift of the light-emitting device.

[0075] It can be understood that, by splitting one display frame into multiple display sub-frames, the embodiment of the present application splits the full-screen data writing stage T1 in the related art into multiple data writing stages, and each data writing stage performs data signal writing for part of the sub-pixels. Although the time points of data signal update for different sub-pixels in the same display frame can be different, for example, in different data writing stages, the time interval between two adjacent data updates of each sub-pixel is the same, which is one frame time. Therefore, the starting point of the light-emitting time of each sub-pixel under the same data signal can be different, but the light-emitting time length under the same data signal can be allocated to the same number of light-emitting stages, and the driving method of the embodiment of the present application can normally realize data refresh and display of each sub-pixel. Specifically, continuing to refer to Figure 3 , if a sub-pixel updates the data signal in the data writing stage Td1 of the first display sub-frame FZ1 of the current display frame, the next time of updating the data signal is in the first data writing stage of the next display frame, and the interval between the two data signal updates is four light-emitting stages of the current display frame; if a sub-pixel updates the data signal in the data writing stage Td2 of the second display sub-frame FZ2 of the current display frame, the next time of updating the data signal is in the second data writing stage of the next display frame, and the interval between the two data signal updates is three light-emitting stages of the current display frame and the first light-emitting stage of the next display frame; and so on. It can be understood that, the first time of data signal writing of a sub-pixel in a display frame can be regarded as data signal update, and if the sub-pixel performs multiple data signal writings in a display frame, the potential of the data signal written to the sub-pixel in the second and subsequent data signal writing processes is the same as that in the first time.

[0076] In the driving method of the display panel provided by the embodiment of the present application, one display frame is divided into at least two display sub-frames, in the same display frame, data signal writing is performed for part of the sub-pixels in the data writing stage of each display sub-frame, and all the sub-pixels are controlled to display in the light-emitting stage of each display sub-frame. In this way, the data signal writing process of all the sub-pixels can be divided into different data writing stages, the data signal output performance requirement of the control module is reduced; and the light-emitting time of the sub-pixels can be divided into the light-emitting stages of different display sub-frames, on the basis of ensuring that the proportion of the light-emitting time length of the sub-pixels in one frame time is unchanged, the flash screen frequency of the display panel can be doubled, which is beneficial to making the flash screen frequency of the display panel exceed the range of human eye perception, thereby improving the flash screen phenomenon, especially the flash screen phenomenon under low gray scale, and effectively improving the display effect of the display panel.

[0077] On the basis of each of the above embodiments, optionally, the time length of the light emitting stage of different display sub-frames in the same display frame is the same, so as to divide the light emitting time length of each sub-pixel into each light emitting stage, so as to ensure the display effect. Further, the time length of the data writing stage of different display sub-frames in the same display frame can also be set to be the same, so that the time length of the non-light emitting stage in different display sub-frames is also the same, that is, one display frame is divided into a plurality of display sub-frames, each display sub-frame includes equal non-light emitting stage and equal light emitting stage, so that the screen flashing phenomenon of the display panel can be further improved. For example, the number of sub-pixels for data signal writing in each data writing stage can be set to be the same.

[0078] On the basis of each of the above embodiments, optionally, the display area of the display panel can include at least two display sub-areas, and the number of display sub-frames in the same display frame is the same as the number of display sub-areas. Correspondingly, in the data writing stage of different display sub-frames in the same display frame, data signals can be written to sub-pixels in different display sub-areas respectively, that is, data signals are written to each sub-pixel in one display sub-area in each data writing stage. This is conducive to the design of the driving order and driving strategy of each sub-pixel in the display panel. There are various partition modes of the display panel, and some of them will be exemplarily described below, but they are not limitations of the present application.

[0079] Figure 4 is a partition mode of a display panel and a corresponding driving timing diagram provided by an embodiment of the present application. Referring to Figure 4 In an embodiment, optionally, each display sub-area is arranged along the column direction of the display panel. Figure 4 In the embodiment, the display panel includes two display sub-areas A11 and A12, and a display frame F includes two display sub-frames FZ. In the first display sub-frame, data signals can be written to sub-pixels in the display sub-area A11, and in the second display sub-frame, data signals can be written to sub-pixels in the display sub-area A12, or the data signal writing can be performed in reverse order.

[0080] Figure 5 is another partition mode of a display panel and a corresponding driving timing diagram provided by an embodiment of the present application. Referring to Figure 5 In another embodiment, optionally, each display sub-area is arranged along the row direction of the display panel. Figure 5 In the embodiment, the display panel includes two display sub-areas A21 and A22, and a display frame F includes two display sub-frames FZ. In the first display sub-frame, data signals can be written to sub-pixels in the display sub-area A21, and in the second display sub-frame, data signals can be written to sub-pixels in the display sub-area A22, or the data signal writing can be performed in reverse order.

[0081] Figure 6 is another partition mode of a display panel and a corresponding driving timing diagram provided by an embodiment of the present application. Referring to Figure 6 In another embodiment, the display sub-areas are arranged in an array in the display panel. Figure 6 In the embodiment, the display panel includes four display sub-areas, A31, A32, A33 and A34, and a display frame F includes four display sub-frames FZ. In the first display sub-frame, data signals are written to the sub-pixels in the display sub-area A31, in the second display sub-frame, data signals are written to the sub-pixels in the display sub-area A32, in the third display sub-frame, data signals are written to the sub-pixels in the display sub-area A33, and in the fourth display sub-frame, data signals are written to the sub-pixels in the display sub-area A34, or the data signal writing is performed in a random order or in a reverse order.

[0082] Alternatively, the display sub-areas in the display panel can be irregularly shaped. Further alternatively, the same display sub-area can include multiple rows of sub-pixels arranged at intervals and / or multiple columns of sub-pixels arranged at intervals. The specific partition mode can be set according to actual requirements.

[0083] On the basis of the above embodiments, the display panel can include a plurality of first scan lines, each of which is connected to a row of sub-pixels. The first scan lines transmit first scan signals for controlling whether data signals are written to the sub-pixels. The first scan signals are provided in the form of on-pulses in the plurality of first scan lines row by row, so as to control the data signals to be written to the sub-pixels row by row. Then, the number of rows of sub-pixels included in each display sub-area can be set to be the same, so that the time required for data writing in each display sub-area is the same, and the time length of each data writing stage in the same display frame is the same, which is beneficial to improving the consistency of the driving process of each display sub-frame and improving the screen flickering phenomenon.

[0084] Preferably, the display sub-areas are arranged along the column direction of the display panel, so that the time required for each display sub-area to complete the data signal writing of each sub-pixel is the shortest, the one-frame time is fully utilized, the proportion of the light-emitting stage in the frame time is maximized, the non-light-emitting time period of the whole screen is reduced, and the screen flickering phenomenon is improved. For example, the display panel includes k display sub-areas arranged along the column direction, and the display area of the display panel is divided into k parts, where k>1. Then, the time length of each data writing stage Td can be set to be 1 / k of the whole-screen data writing stage T1 in the related art.

[0085] On the basis of the above embodiments, the number of display sub-areas can be 2-6, for example, 4.

[0086] The above embodiments exemplarily provide the overall idea of the driving method of the display panel, and the driving method of the display panel will be described in detail in combination with the structure of the sub-pixel.

[0087] Figure 7 is a structural schematic diagram of a sub-pixel provided by an embodiment of the present application. Referring to Figure 7 In an embodiment, the sub-pixel comprises a pulse width modulation circuit 10 and a light emitting device L, and the pulse width modulation circuit 10 is connected to the light emitting device L. For example, the pulse width modulation circuit 10 is connected to a data signal Data_t, a sweep signal Sweep and a first power supply signal VDD respectively, and is connected to an anode of the light emitting device L, and a cathode of the light emitting device L is connected to a second power supply signal VSS. The first power supply signal VDD and the second power supply signal VSS have different potentials, for example, the first power supply signal VDD is a high potential and the second power supply signal VSS is a low potential. The pulse width modulation circuit 10 is used to control whether the light emitting device L is in communication with the first power supply signal VDD according to the data signal Data_t and the sweep signal Sweep, so as to control whether the light emitting device emits light.

[0088] Correspondingly, the driving method of the display panel comprises:

[0089] In the data writing stage, the data signal Data_t is provided to the pulse width modulation circuit 10 in each sub-pixel in the partial sub-pixels row by row. For example, the partial sub-pixels are all the sub-pixels in one display sub-area.

[0090] In the light emitting stage, the potential of the sweep signal Sweep received by the pulse width modulation circuit 10 in all the sub-pixels in the display panel is controlled to monotonically change, so that each pulse width modulation circuit 10 controls the light emitting time of the connected light emitting device L according to the received data signal Data_t and the sweep signal Sweep.

[0091] Referring to Figures 3-6 , the sweep signal Sweep can be a ramp signal in the light emitting stage Ts. For example, the pulse width modulation circuit 10 can realize the function of potential comparison, for example, when the potential of the sweep signal Sweep is greater than the potential of the data signal Data_t, the light emitting device L is controlled to emit light. The potential of the sweep signal Sweep can gradually decrease in the light emitting stage Ts. It can be understood that the waveform of the sweep signal Sweep as a whole can be set according to actual needs, for example, the waveform as a whole is a ramp signal, or a triangular wave signal, or a waveform in the form of a broken line, etc., as long as the potential of the sweep signal Sweep monotonically changes in the light emitting stage Ts. The sweep signal Sweep can be a global signal, that is, all the sub-pixels in the display panel can access the same sweep signal Sweep, so as to realize full screen display and facilitate simplification of the control logic.

[0092] In the above embodiments, optionally, in the light-emitting stage Ts, the potential of the sweep signal Sweep can be set to monotonously change within the potential range of the data signal corresponding to the full gray scale, so as to realize the display of each gray scale. The potential range of the data signal corresponding to the full gray scale can refer to the range between the two horizontal dotted lines in FIG. 6, i.e., the potential range between the data signals Data_t corresponding to the highest gray scale and the lowest gray scale. In other words, the stage in which the potential of the sweep signal Sweep monotonously changes within the potential range of the data signal corresponding to the full gray scale can be defined as the light-emitting stage Ts. Figure 3

[0093] Therefore, the embodiment of the present application is equivalent to splitting the data writing timing of the full screen into multiple times of writing, realizing the partition scanning of the full screen, and providing a light-emitting stage Ts after the end of each data writing stage Td, so as to realize the simultaneous display of the full screen. The sweep signal Sweep is provided in each light-emitting stage Td, and the sweep signal Sweep provides a complete period in each display subframe. Before the start of the light-emitting stage Ts and after the end of the light-emitting stage Ts, the potential of the sweep signal Sweep is located outside the potential range of the data signal corresponding to the full gray scale.

[0094] In the above embodiments, optionally, in different light-emitting stages Ts of the same display frame F, the slopes of the sweep signals Sweep can be set to be the same, so as to ensure the consistency of the driving process in each display subframe FZ, ensure the display effect and improve the screen flicker. The slopes of the sweep signals Sweep in different display frames F can be the same or different, for example, the slope of the sweep signal Sweep can be adjusted according to the demand of the brightness of the full screen.

[0095] Figure 8 FIG. 7 is another structure diagram of a sub-pixel provided by the embodiment of the present application. Referring to FIG. 7, Figure 8 On the basis of the above embodiments, optionally, the pulse width modulation circuit 10 can include a modulation circuit 11 and a first transistor M1. The modulation circuit 11 is connected to the data signal Data_t and the sweep signal Sweep respectively, and connected to the gate of the first transistor M1. The first electrode of the first transistor M1 is connected to the first power supply signal VDD, and the second electrode of the first transistor M1 is connected to the anode of the light-emitting device L. The modulation circuit 11 can realize the function of potential comparison, for example, when the potential of the sweep signal Sweep is greater than the potential of the data signal Data_t, the first transistor M1 is controlled to be turned on, so as to control the light-emitting device L to emit light.

[0096] ​Further, the sub-pixel can further comprise a light emitting control module 20 connected between the pulse width modulation circuit 10 and the light emitting device L; the light emitting control module 20 and the pulse width modulation circuit 10 jointly control the light emitting time of the light emitting device L. Specifically, the light emitting control module 20 can comprise a second transistor M2 connected between the second electrode of the first transistor M1 and the anode of the light emitting device L, and the gate of the second transistor T2 is connected to the light emitting control signal EM. Referring to Figures 3-6 Taking the case that the second transistor M2 is a P-type transistor and the on-potential of the light emitting control module 20 is a low potential, in any display sub-frame FZ, the time when the light emitting control signal EM jumps from the off-potential of the light emitting control module 20 to the on-potential of the light emitting control module 20 can be taken as the starting time of the light emitting stage Ts. The light emitting control signal EM can be a global signal, which cooperates with the sweep signal Sweep to accurately control the light emitting time of the light emitting device L. The cooperation relationship between the light emitting control signal EM and the sweep signal Sweep can be that the starting time of the light emitting stage Ts corresponds to the time when the control sweep signal Sweep enters the potential range of the data signal corresponding to the full gray scale from outside the range. In the data writing stage Td, the light emitting control signal EM keeps the off-potential of the light emitting control module 20 to avoid the light emitting device L from mis-lighting.

[0097] Correspondingly, the driving method of the display panel comprises:

[0098] In each data writing stage Td, the light emitting control signal EM received by the light emitting control module 20 in all sub-pixels in the display panel keeps the off-potential of the light emitting control module 20, and the data signal writing of each sub-pixel in the corresponding display sub-area is performed.

[0099] In each light emitting stage Ts, the light emitting control signal EM received by the light emitting control module 20 in all sub-pixels in the display panel keeps the on-potential of the light emitting control module 20, and the sweep signal Sweep with monotonically changing potential is provided to all sub-pixels.

[0100] In the same display sub-frame FZ, the time length of the light emitting control signal EM keeping the off-potential of the light emitting control module 20 can be greater than or equal to the time length of the data writing stage Td, preferably greater, to provide a preparation stage of the sweep signal Sweep, so as to facilitate the cooperation between the light emitting control signal EM and the sweep signal Sweep. The time length of the light emitting control signal EM keeping the on-potential of the light emitting control module 20 can be greater than or equal to the time length of the light emitting stage Ts, preferably greater, to provide a reset stage of the sweep signal Sweep, so as to provide the sweep signal Sweep in the next display sub-frame FZ.

[0101] Exemplarily, in each display sub-frame FZ, a transition edge of a trigger signal can be provided in the stage between the data writing stage Td and the light emitting stage Ts, and the potential of the sweep signal Sweep starts to monotonously change from the transition edge of the trigger signal, so as to control the state of the sweep signal Sweep in each display sub-frame FZ. The trigger signal can be set according to the actual circuit structure of the sub-pixel, which will not be described in detail here.

[0102] Figure 9 is another structure diagram of a sub-pixel provided by an embodiment of the present application. Referring to Figure 9 On the basis of the above-mentioned embodiments, optionally, the sub-pixel can further comprise: a pulse amplitude modulation circuit 30 connected between the pulse width modulation circuit 10 and the light emitting control module 20 and connected to the data voltage Data_I; the pulse amplitude modulation circuit 30 is used to control the driving current transmitted to the light emitting device L in the light emitting stage according to the data voltage Data_I, so as to realize the cooperative driving of PWM and PAM (Pulse Amplitude Modulation). Specifically, the pulse amplitude modulation circuit 30 can comprise a pulse amplitude modulation unit 31 and a third transistor M3; the pulse amplitude modulation unit 31 is connected to the data voltage Data_I and connected to the gate of the third transistor M3, and the third transistor M3 is connected between the first transistor M1 and the second transistor M2.

[0103] Continuing to refer to Figure 9 On the basis of the above-mentioned embodiments, optionally, the pulse width modulation circuit 10 can comprise: a writing module 110 and a pulse width modulation module 120; the writing module 110 is connected to the pulse width modulation module 120, and the pulse width modulation module 120 is connected to the light emitting device L. Specifically, the writing module 110 is used to control the time when the data signal Data_t and the sweep signal Sweep are transmitted to the pulse width modulation module 120. The pulse width modulation module 120 can comprise a pulse width modulation unit 121 and a first transistor M1, the pulse width modulation unit 121 is connected to the writing module 110 and the first transistor M1 respectively, and the pulse width modulation unit 121 is used to compare the sizes of the data signal Data_t and the sweep signal Sweep and control the conduction state of the first transistor M1 accordingly. The writing module 110 and the pulse width modulation unit 121 together constitute the modulation circuit 11 in Figure 8 .

[0104] On the basis of the above-mentioned embodiments, optionally, the control module of the display panel can comprise a scan driving circuit and an image data sending module, which cooperate to control the driving timing of each sub-pixel. The image data sending module can be arranged in the driving IC of the display panel. The working state of the scan driving circuit can be controlled by the driving IC, for example, a scan timing control module can be arranged in the driving IC to control the scan driving circuit.

[0105] Specifically, the scan driving circuit can be connected to each writing module 110, for example, through each scan line to connect the writing module 110 of each row of sub-pixels. The image data sending module can be connected to each writing module 110, for example, through each data line to connect the writing module 110 of each column of sub-pixels. Then, the driving method of the display panel further comprises:

[0106] In the data writing stage, the image data sending module is controlled to provide the data signal Data_t required by each writing module 110 in part of the sub-pixels in time, and the scan driving circuit is controlled to correspond to the output signal of each writing module 110 in part of the sub-pixels, so that each writing module 110 in part of the sub-pixels is controlled to act in turn to transmit the data signal Data_t to the pulse width modulation module 120.

[0107] Exemplarily, in the data writing stage, the scan driving circuit can control the writing module 110 of each sub-pixel in the corresponding display sub-area to be opened in turn, and the image data sending module can provide the data signal Data_t to each sub-pixel in the corresponding display sub-area in turn, so that the pulse width modulation module 120 of each sub-pixel in the display sub-area receives the data signal Data_t in turn. Wherein, the image data sending module can transmit the data signal Data_t corresponding to a row of sub-pixels to the corresponding data line before the scan driving circuit controls the writing module 110 of the row of sub-pixels to be opened, so that the data signal Data_t is transmitted to the pulse width modulation module 120 when the writing module 110 is opened.

[0108] In the light emitting stage, the image data sending module is controlled to provide the sweep signal Sweep to the writing module 110 of all sub-pixels in the display panel at the same time, and the scan driving circuit is controlled to control the output signal of each writing module 110 in the display panel, so that each writing module 110 of each sub-pixel in the display panel transmits the sweep signal Sweep to the pulse width modulation module 120.

[0109] Exemplarily, in the light emitting stage, the scan driving circuit can control the writing module 110 of all sub-pixels to be opened, and the image data sending module can continuously provide the sweep signal Sweep in the light emitting stage, so that each sub-pixel receives the same sweep signal Sweep in the light emitting stage.

[0110] On the basis of the above-mentioned embodiments, optionally, the structure of the writing module 110 has multiple, and the specific structure of the corresponding control module has multiple, which will be described below.

[0111] Figure 10 is a structure schematic diagram of a writing module provided by an embodiment of the application. Referring to Figure 10 Exemplarily, the writing module 110 can include a data writing unit 111 and a sweep writing unit 112, and the writing process of two types of signals is controlled by setting two writing units. The data writing unit 111 is used for controlling whether the data signal Data_t is transmitted to the pulse width modulation module 120 according to the first scan signal S1, and the sweep writing unit 112 is used for controlling whether the sweep signal Sweep is transmitted to the pulse width modulation module 120 according to the second scan signal S2. Specifically, the data writing unit 111 can include a fourth transistor M4, the gate of the fourth transistor M4 is connected to the first scan signal S1, the first electrode is connected to the data signal Data_t, and the second electrode is connected to the pulse width modulation module 120; the sweep writing unit 112 can include a fifth transistor M5, the gate of the fifth transistor M5 is connected to the second scan signal S2, the first electrode is connected to the sweep signal Sweep, and the second electrode is connected to the pulse width modulation module 120.

[0112] Then, in the data writing stage, the scan driving circuit can be controlled to output the on-potential of the data writing unit 111 to each sub-pixel 40 in the corresponding display sub-area row by row, and the image data sending module is controlled to provide the data signal Data_t required by different rows of sub-pixels 40 in the corresponding display sub-area in time, so that the pulse width modulation module 120 in each sub-pixel 40 in the display sub-area receives the required data signal Data_t row by row. In the light-emitting stage, the scan driving circuit can be controlled to maintain the on-potential of the sweep writing unit 112 provided by the second scan signal S2 of each sweep writing unit 112, and the image data sending module is controlled to simultaneously provide the sweep signal Sweep required by each sub-pixel 40, so that the pulse width modulation module 120 in all sub-pixels 40 receives the sweep signal Sweep.

[0113] Figure 11 is a structure schematic diagram of a display panel provided by an embodiment of the application. In combination with Figure 10 and Figure 11In an embodiment, the control module of the display panel can optionally include a driving IC 600 and a scan driving circuit, the driving IC 600 can be configured with an image data sending module 610 and a scan timing control module 620; the image data sending module 610 is configured to control the generation and transmission of the data signal Data_t and the sweep signal Sweep, and the scan timing control module 620 is configured to control the working process of the scan driving circuit to control the generation and transmission of the scan signals. The scan timing control module 620 can also directly provide a global light-emitting control signal EM.

[0114] Specifically, the scan driving circuit can include a first scan driving module 500 and a second scan driving module. The image data sending module 610 can include a data signal generating unit 611 and a sweep signal generating unit 612. The first scan driving module 500 is connected to the data writing units 111 in each row of the sub-pixels 40 through a plurality of first scan lines LS1 to provide a first scan signal S1 and control the on-off state of each data writing unit 111. The data signal generating unit 611 is connected to the data writing units 111 in each column of the sub-pixels 40 through a plurality of first data lines LD1 to provide a data signal Data_t. The second scan driving module is connected to the sweep writing units 112 in each row of the sub-pixels 40 through a plurality of second scan lines LS2 to provide a second scan signal S2 and control the on-off state of each sweep writing unit 112. The sweep signal generating unit 612 is connected to the sweep writing units 112 in each column of the sub-pixels 40 through a plurality of second data lines LD2 to provide a sweep signal Sweep.

[0115] For example, the display area AA of the display panel includes at least two display sub-areas; the first scan driving module 500 can include at least two scan driving units 50 corresponding to the at least two display sub-areas; each scan driving unit 50 includes a plurality of cascaded shift registers 51. The display panel further includes at least two start signal lines LIN, each connected to the first-stage shift register 51 in each scan driving unit 50. The start signal line LIN provides a start signal to the first-stage shift register 51, and each stage of shift registers 51 in the same scan driving unit 50 can realize pulse-by-pulse shift output of the start signal to control the data writing units 111 in each row of the sub-pixels 40 to be turned on row by row. In the data writing stage of each display sub-frame of the same display frame, each scan driving unit 50 outputs the on-potential (or on-pulse) of the data writing unit 111 row by row to each row of the sub-pixels 40 in the display sub-area that needs to write the data signal in the data writing stage under the control of the start signal transmitted by the corresponding start signal line LIN. For example Figure 11As shown, in a first display subframe in a display frame, the first scan driving unit 50 can be controlled to act to output the turn-on pulse of the first scan signal S1 to each row of the sub-pixels 40 in the first display sub-area A1 row by row; in a second display subframe in a display frame, the second scan driving unit 50 can be controlled to act to output the turn-on pulse of the first scan signal S1 to each row of the sub-pixels 40 in the second display sub-area A2 row by row. Each of the start signal lines LIN can be connected to the scan timing control module 620, and each of the start signals can be provided by the scan timing control module 620.

[0116] The second scan driving module can include a control signal line LS3 connected to the scan timing control module 620 and each of the second scan lines LS2. Since the sweep signal Sweep is a global signal and each of the sweep writing units 112 can be turned on at the same time, the second scan signal S2 can also be a global signal, which can be directly generated by the scan timing control module 620 and transmitted to each of the second scan lines LS2. Alternatively, the second scan driving module can further include at least one switching unit, each of which is connected to at least one second scan line LS2, and the control end and the input end of each switching unit are connected to the scan timing control module 620. The scan timing control module 620 can control each of the switching units to be turned on at the same time, and transmit the second scan signal S2 to each of the second scan lines LS2. Alternatively, the second scan driving module can include a plurality of shift register units connected in cascade, each of which is connected to a second scan line. The start signal received by the first shift register unit in the second scan driving module can be a signal with a long turn-on pulse width, and the pulse width needs to at least ensure that the overlap time of the turn-on pulses of the second scan signals output by each of the shift register units covers the duration of one light-emitting phase. The specific structure of the second scan driving module can be set according to actual needs, which is not limited here.

[0117] Figure 11 For example, each display sub-area includes three rows of sub-pixels 40, and the corresponding driving timing can be referred to Figure 12 , wherein the first scan signals from top to bottom are sequentially denoted as the first-level first scan signal S11 to the sixth-level first scan signal S16. In combination with Figure 11 and Figure 12 , the driving process of the display panel in a display frame F includes:

[0118] In the data writing stage Td1 of the first display sub-frame FZ1: the first scan driving unit 50 is activated to provide the on-pulse (here, low potential pulse) in the first-level first scan signal S11 to the third-level first scan signal S13 row by row. The data signal generating unit 611 provides the data signal Data_t required by the three rows of sub-pixels 40 in the first display sub-area A1 in time according to the timing of the first scan signal. In this stage, the second scan signal S2 keeps the off-potential (here, high potential), and the sweep signal generating unit 612 can not output the sweep signal Sweep.

[0119] In the light emitting stage Ts1 of the first display sub-frame FZ1: neither of the two scan driving units 50 is activated, and each level of the first scan signal keeps the off-potential (here, high potential), and the data signal generating unit 611 can not output the data signal Data_t. The second scan signal S2 keeps the on-potential (here, low potential), and the sweep signal generating unit 612 continuously outputs the sweep signal Sweep.

[0120] In the data writing stage Td2 of the second display sub-frame FZ2: the second scan driving unit 50 is activated to provide the on-pulse in the fourth-level first scan signal S14 to the third-level sixth scan signal S16 row by row. The data signal generating unit 611 provides the data signal Data_t required by the three rows of sub-pixels 40 in the second display sub-area A2 in time according to the timing of the first scan signal. In this stage, the second scan signal S2 keeps the off-potential, and the sweep signal generating unit 612 can not output the sweep signal Sweep.

[0121] The driving timing in the light emitting stage Ts2 of the second display sub-frame FZ2 is the same as that in the light emitting stage Ts1 of the first display sub-frame FZ1, and will not be described again.

[0122] Figure 13 is another structure diagram of the writing module provided by the embodiment of the present application. Referring to Figure 13 On the basis of the above-mentioned embodiments, the data writing unit 111 can be optionally multiplexed as the sweep writing unit 112. Correspondingly, referring to Figure 14 and Figure 15 , Figure 14 mainly shows the overall structure of the display panel, Figure 15 mainly shows the key structure of one sub-pixel 40 and the specific connection relationship between the components in the control module; under the condition that the data writing unit 111 is multiplexed as the sweep writing unit 112, the first scan driving module 500 can be multiplexed as the second scan driving module, the first data line LD1 can be multiplexed as the second data line LD2, the first scan line LS1 can be multiplexed as the second scan line LS2, and the control signal line LS3 can be omitted. Referring to Figure 12As can be known from the driving timing, in one display frame, the data writing unit 111 and the sweep writing unit 112 in the same sub-pixel 40 are always turned on at different times, so there is a condition that the data writing unit 111 can be multiplexed as the sweep writing unit 112. By multiplexing the two writing units, the structural complexity of the display panel can be effectively reduced, and the wiring of the display panel can be simplified. On this basis, the image data sending module 610 needs to be additionally provided with a switching unit 613. The switching unit 613 is connected to the data signal generating unit 611, the sweep signal generating unit 612, and each data writing unit 111. The switching unit 613 is used to control the data signal generating unit 611 and the sweep signal generating unit 612 to be in communication with each data writing unit 111 at different times. Specifically, in each data writing stage, the switching unit 613 controls the data signal generating unit 611 to be in communication with each data writing unit 111, and in each light emitting stage, the switching unit 613 controls the sweep signal generating unit 612 to be in communication with each data writing unit 111.

[0123] The embodiment of the present application also provides a display panel, which comprises a control module and a plurality of sub-pixels. The control module is used to execute the driving method of the display panel provided by any of the embodiments of the present application, and has the corresponding beneficial effects.

[0124] On the basis of the above-mentioned embodiments, optionally, the sub-pixel comprises a pulse width modulation circuit and a light emitting device, the pulse width modulation circuit comprises a writing module and a pulse width modulation module; the pulse width modulation module is connected to the writing module and the light emitting device; the control module comprises a scan driving circuit and an image data sending module.

[0125] The scan driving circuit comprises a first scan driving module and a second scan driving module; the image data sending module comprises a data signal generating unit and a sweep signal generating unit; the writing module comprises a data writing unit and a sweep writing unit. The data writing unit and the sweep writing unit are both connected to the pulse width modulation module in the sub-pixel where the writing module is located; the first scan driving module is connected to each data writing unit and is used to control the turn-on state of each data writing unit; the data signal generating unit is connected to each data writing unit and is used to provide a data signal to each data writing unit; the second scan driving module is connected to each sweep writing unit and is used to control the turn-on state of each sweep writing unit; and the sweep signal generating unit is connected to each sweep writing unit and is used to provide a sweep signal to each sweep writing unit.

[0126] On the basis of the above-mentioned embodiments, optionally, the first scan driving module can be multiplexed as the second scan driving module, and the data writing unit can be multiplexed as the sweep writing unit, so as to simplify the wiring of the display panel. Correspondingly, the image data sending module further comprises a switching unit, which is connected with the data signal generating unit, the sweep signal generating unit and each data writing unit respectively; the switching unit is configured to control the data signal generating unit and the sweep signal generating unit to be in communication with each data writing unit in time division; wherein, in each data writing stage, the switching unit controls the data signal generating unit to be in communication with each data writing unit, and in each light emitting stage, the switching unit controls the sweep signal generating unit to be in communication with each data writing unit.

[0127] On the basis of the above-mentioned embodiments, optionally, the display area of the display panel comprises at least two display sub-areas; the number of display sub-frames in the same display frame is the same as the number of display sub-areas. The first scan driving module comprises at least two scan driving units corresponding to the at least two display sub-areas, so as to split the scan driving time sequence into multiple scans, facilitating the partitioned writing of the data signal; the scan driving unit comprises a plurality of cascaded shift registers. The display panel further comprises at least two start signal lines, each of which is connected with a first stage shift register in each scan driving unit. Then, in the data writing stage of each display sub-frame in the same display frame, each scan driving unit outputs the on potential of the data writing unit to each row of sub-pixels in the display sub-area which needs to write the data signal in the data writing stage under the control of the corresponding start signal line.

[0128] It should be noted that in the embodiments of the driving method of the display panel, different display panel structures are specifically described, and these structures can be considered as the structures of the display panel provided in the embodiments of the present application. For the details not described, please refer to the above-mentioned embodiments, and the repeated contents will not be described here.

[0129] It should be understood that the steps shown above can be reordered, added or deleted. For example, the steps described in the present application can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0130] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A driving method of a display panel, characterized by, The display panel comprises: a display frame is divided into at least two display subframes, and each display subframe comprises a data writing stage and a light emitting stage; in the data writing stage of each display subframe, data signals are written into part of the subpixels in the display panel; in the light emitting stage of each display subframe, each subpixel in the display panel displays according to the corresponding data signal.

2. The driving method of a display panel according to claim 1, wherein The display area of the display panel comprises: at least two display subareas; the number of display subframes in the same display frame is the same as the number of display subareas; in the data writing stage of different display subframes in the same display frame, data signals are written into subpixels in different display subareas, respectively; Preferably, each display subarea is arranged along the column direction of the display panel.

3. The driving method of the display panel according to claim 1 or 2, wherein The subpixel comprises: a pulse width modulation circuit and a light emitting device, and the pulse width modulation circuit is connected to the light emitting device; in the data writing stage, data signals are provided to the pulse width modulation circuit in each subpixel in the part of subpixels row by row; in the light emitting stage, the potential of the sweep signal received by the pulse width modulation circuit in all the subpixels in the display panel is monotonously changed, so that each pulse width modulation circuit controls the light emitting time of the connected light emitting device according to the received data signal and the sweep signal; Preferably, in the light emitting stage, the potential of the sweep signal monotonously changes within the potential range of the data signal corresponding to the full gray scale; Preferably, in different light emitting stages of the same display frame, the slopes of the sweep signals are the same.

4. The driving method of a display panel according to claim 3, wherein The subpixel further comprises: a light emitting control module connected between the pulse width modulation circuit and the light emitting device; The driving method of the display panel further comprises: in each data writing stage, the light emitting control signal received by the light emitting control module in all the subpixels in the display panel keeps the off potential of the light emitting control module; in each light emitting stage, the light emitting control signal received by the light emitting control module in all the subpixels in the display panel keeps the on potential of the light emitting control module; Preferably, in the same display subframe, the duration for which the light emitting control signal keeps the off potential of the light emitting control module is greater than or equal to the duration of the data writing stage; and the duration for which the light emitting control signal keeps the on potential of the light emitting control module is greater than or equal to the duration of the light emitting stage.

5. The driving method of a display panel according to claim 3, wherein The pulse width modulation circuit comprises: a writing module and a pulse width modulation module; the writing module is connected to the pulse width modulation module, and the pulse width modulation module is connected to the light emitting device; The display panel further comprises: a scanning driving circuit connected to each writing module; The display panel further comprises: an image data sending module connected to each writing module; The driving method of the display panel further comprises: In the data writing stage, the image data sending module is controlled to provide data signals required by different rows of sub-pixels to each of the writing modules in the part of sub-pixels in time, and the scanning driving circuit is controlled to correspond to each output signal of the part of sub-pixels, so that each of the writing modules in the part of sub-pixels acts in turn to transmit the data signals to the pulse width modulation module; In the light emitting stage, the image data sending module is controlled to provide the sweep signal to the writing modules in all the sub-pixels in the display panel at the same time, and the scanning driving circuit is controlled to correspond to each output signal of the writing modules in each of the sub-pixels in the display panel, so that the writing modules in each of the sub-pixels in the display panel transmit the sweep signal to the pulse width modulation module.

6. The driving method of a display panel according to claim 2, wherein The number of rows of sub-pixels included in each of the display sub-areas is the same; In the same display frame, the time length of each of the data writing stages is the same; Preferably, the number of the display sub-areas is 2-6. Preferably, the number of the display sub-areas is 4.

7. A display panel, characterized by comprising: Comprise: A control module and a plurality of sub-pixels; the control module is used to execute the driving method of the display panel in any one of claims 1-6.

8. The display panel of claim 7, wherein, The sub-pixel comprises: a pulse width modulation circuit and a light emitting device, the pulse width modulation circuit comprises a writing module and a pulse width modulation module; the pulse width modulation module is connected with the writing module and the light emitting device respectively; the control module comprises: a scanning driving circuit and an image data sending module; The scanning driving circuit comprises: a first scanning driving module and a second scanning driving module; the image data sending module comprises: a data signal generating unit and a sweep signal generating unit; the writing module comprises: a data writing unit and a sweep writing unit; The data writing unit and the sweep writing unit are connected with the pulse width modulation module in the sub-pixel where the writing module is located; The first scanning driving module is connected with each of the data writing units, and is used to control the conduction state of each of the data writing units; The data signal generating unit is connected with each of the data writing units, and is used to provide the data signal to each of the data writing units; The second scanning driving module is connected with each of the sweep writing units, and is used to control the conduction state of each of the sweep writing units; The sweep signal generating unit is connected with each of the sweep writing units, and is used to provide the sweep signal to each of the sweep writing units; Preferably, the sub-pixel further comprises: a light emitting control module connected between the pulse width modulation circuit and the light emitting device; the pulse width modulation circuit and the light emitting control module jointly control the light emitting time of the light emitting device; Preferably, the sub-pixel further comprises: a pulse amplitude modulation circuit connected between the pulse width modulation circuit and the light emitting control module and accessed with a data voltage; the pulse amplitude modulation circuit is used to control the driving current transmitted to the light emitting device in the light emitting stage according to the data voltage.

9. The display panel of claim 8, wherein, The first scanning driving module is multiplexed as the second scanning driving module; the data writing unit is multiplexed as the sweep writing unit; The image data sending module further comprises a switching unit connected to the data signal generating unit, the sweep signal generating unit and each data writing unit; the switching unit is used for controlling the data signal generating unit and the sweep signal generating unit to communicate with each data writing unit in time; wherein in each data writing stage, the switching unit controls the data signal generating unit to communicate with each data writing unit, and in each light emitting stage, the switching unit controls the sweep signal generating unit to communicate with each data writing unit.

10. The display panel of claim 8 or 9, wherein, The display area of the display panel comprises at least two display sub-areas; the number of display sub-frames in the same display frame is the same as the number of display sub-areas; The first scan driving module comprises at least two scan driving units corresponding to the at least two display sub-areas; the scan driving unit comprises a plurality of cascaded shift registers; The display panel further comprises at least two start signal lines connected to the first stage shift registers in each scan driving unit; In the data writing stage of each display sub-frame in the same display frame, each scan driving unit outputs the on potential of the data writing unit to each row of sub-pixels in the display sub-area which needs to write data signal in the data writing stage under the control of the corresponding start signal line.

Images