Display panel, driving method thereof, and display device

Abstract

The present application discloses a display panel, a driving method thereof, and a display device. The display panel includes that each pixel row includes a plurality of sub-pixels, each sub-pixel includes a pixel driving circuit and a light-emitting diode, the pixel driving circuit includes a driving module and a data writing module; the data writing module is configured to write a voltage corresponding to a data voltage to a control end of the driving module, and the driving module is configured to provide a driving current to the light-emitting diode according to the voltage of the control end to drive the light-emitting diode to emit light; the pixel rows include odd pixel rows and even pixel rows; a scanning driving circuit is configured to output first scanning signals with different pulse widths to the data writing modules of the sub-pixels of the odd pixel rows and the data writing modules of the sub-pixels of the even pixel rows respectively in a data writing stage. The embodiments of the present application improve the display effect of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technologies, and in particular, to a display panel, a driving method thereof, and a display device. Background Art

[0002] With the development of OLED (Organic Light-Emitting Diode) display technology, people have higher and higher requirements for OLED display panels. However, existing OLED display panels have problems with poor display effects.

[0003] Application Content

[0004] This application provides a display panel, a driving method thereof, and a display device to improve the display effect of the display panel.

[0005] According to one aspect of this application, a display panel is provided, including:

[0006] a scan driving circuit and a plurality of pixel rows;

[0007] Each of the pixel rows includes a plurality of sub-pixels, and each of the sub-pixels includes a pixel driving circuit and a light-emitting diode. The pixel driving circuit includes a driving module and a data writing module; a first end of the data writing module is electrically connected to a data line, a second end of the data writing module is electrically connected to a first end of the driving module, and a control end of the data writing module is electrically connected to the scan driving circuit; the data writing module is configured to write a voltage corresponding to a data voltage to a control end of the driving module, and the driving module is configured to provide a driving current to the light-emitting diode according to the voltage at the control end to drive the light-emitting diode to emit light;

[0008] The pixel rows include odd pixel rows and even pixel rows;

[0009] The scan driving circuit is configured to output a first odd-row scan signal and a first even-row scan signal to the data writing modules of the sub-pixels of the odd pixel rows and the data writing modules of the sub-pixels of the even pixel rows respectively during a data writing stage, and a pulse width of the first odd-row scan signal is different from a pulse width of the first even-row scan signal.

[0010] Optionally, the display panel further includes:

[0011] a driving chip configured to determine a display mode of the display panel and send a control signal to the scan driving circuit according to the display mode; wherein, minimum display brightnesses of different display modes are the same, and maximum display brightnesses of different display modes are different;

[0012] The scanning driving circuit is configured to output the first odd - row scanning signal to the data writing module of the sub - pixels of the odd - numbered pixel rows and output the first even - row scanning signal to the data writing module of the sub - pixels of the even - numbered pixel rows according to the control signal during the data writing phase. Among them, the ratio of the pulse width of the first odd - row scanning signal to the pulse width of the first even - row scanning signal corresponding to different display modes is different.

[0013] The pulse width of the first odd - row scanning signal and the pulse width of the first even - row scanning signal are determined according to the pulse width of the first odd - row scanning signal corresponding to multiple different preset gray levels and the pulse width of the first even - row scanning signal corresponding to the multiple different preset gray levels;

[0014] Optionally, the pulse width of the first odd - row scanning signal and the pulse width of the first even - row scanning signal are determined by an interpolation algorithm according to the pulse width of the first odd - row scanning signal corresponding to multiple different preset gray levels and the pulse width of the first even - row scanning signal corresponding to the multiple different preset gray levels.

[0015] Optionally, the pixel driving circuit further includes a compensation module and a first initialization module; the first ends of the compensation module and the first initialization module are both electrically connected to the control end of the driving module, and the second end of the compensation module is electrically connected to the second end of the driving module;

[0016] The control end of the compensation module is electrically connected to the scanning driving circuit, and the control end of the first initialization module is electrically connected to the scanning driving circuit;

[0017] The scanning driving circuit is further configured to output a second scanning signal to the compensation module during the data writing phase and output a third scanning signal to the first initialization module during the initialization phase;

[0018] The pulse widths of the second scanning signal for the odd - numbered pixel rows and the even - numbered pixel rows are equal, and the pulse widths of the third scanning signal for the odd - numbered pixel rows and the even - numbered pixel rows are equal.

[0019] Optionally, the pixel driving circuit further includes a second initialization module, and the second initialization module is configured to initialize the first pole of the light - emitting diode. The control end of the second initialization module is electrically connected to the scanning driving circuit;

[0020] The scanning driving circuit is further configured to output the first odd - row scanning signal and the first even - row scanning signal to the second initialization module of the sub - pixels of the odd - numbered pixel rows and the second initialization module of the sub - pixels of the even - numbered pixel rows respectively during the data writing phase.

[0021] Optionally, the driving module includes a driving transistor, the data writing module includes a first P-type transistor, and the second initialization module includes a second P-type transistor; the compensation module includes a first N-type transistor, and the first initialization module includes a second N-type transistor.

[0022] Optionally, the driving chip is configured to obtain the position of the brightness adjustment bar in the display panel and determine the display mode according to the position of the brightness adjustment bar.

[0023] According to another aspect of the present application, there is provided a display device including the display panel according to any embodiment of the present invention.

[0024] According to another aspect of the present application, there is provided a driving method for a display panel, where the display panel includes a scanning driving circuit and a plurality of pixel rows;

[0025] Each of the pixel rows includes a plurality of sub-pixels, and each of the sub-pixels includes a pixel driving circuit and a light-emitting diode. The pixel driving circuit includes a driving module and a data writing module; a first end of the data writing module is electrically connected to a data line, a second end of the data writing module is electrically connected to a first end of the driving module, and a control end of the data writing module is electrically connected to the scanning driving circuit; the data writing module is configured to write a voltage corresponding to a data voltage to a control end of the driving module, and the driving module is configured to provide a driving current to the light-emitting diode according to the voltage at the control end to drive the light-emitting diode to emit light;

[0026] The pixel rows include odd pixel rows and even pixel rows;

[0027] The driving method includes:

[0028] The scanning driving circuit outputs a first odd-row scanning signal and a first even-row scanning signal to the data writing modules of the sub-pixels of the odd pixel rows and the data writing modules of the sub-pixels of the even pixel rows respectively during a data writing stage, and a pulse width of the first odd-row scanning signal is different from a pulse width of the first even-row scanning signal.

[0029] Optionally, the method further includes:

[0030] The driving chip determines the display mode of the display panel and sends a control signal to the scanning driving circuit according to the display mode; wherein, minimum display brightnesses of different display modes are the same, and maximum display brightnesses of different display modes are different;

[0031] The scanning driving circuit outputs the first odd - row scanning signal to the data writing module of the sub - pixels of the odd - numbered pixel rows and outputs the first even - row scanning signal to the data writing module of the sub - pixels of the even - numbered pixel rows according to the control signal during the data writing stage. Among them, the ratio of the pulse width of the first odd - row scanning signal corresponding to different display modes to the pulse width of the first even - row scanning signal is different.

[0032] The scanning driving circuit of the embodiment of the present application outputs the first scanning signals with different pulse widths to the data writing module of the sub - pixels of the odd - numbered pixel rows and the data writing module of the sub - pixels of the even - numbered pixel rows respectively during the data writing stage, so that the pulse widths of the actual first scanning signals output to the data writing module of the sub - pixels of the odd - numbered pixel rows and the data writing module of the sub - pixels of the even - numbered pixel rows are similar or equal. As a result, the actual conduction durations of the data writing modules of the odd - numbered rows and the even - numbered rows during the data writing stage are similar or equal, which can reduce the difference in the voltages written by the data voltages of the odd - numbered pixel rows and the even - numbered pixel rows to the control end of the driving module through the data writing module during the data writing stage, improve the brightness change when the display panel displays the picture, that is, improve the flicker problem when the display panel displays the picture at a lower frequency, and enhance the display effect of the display panel.

[0033] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become easily understandable through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 is a schematic diagram of a display panel provided by an embodiment of the present application;

[0036] Figure 2 is a schematic diagram of a pixel driving circuit provided by an embodiment of the present application;

[0037] Figure 3 is a diagram of the change of FMA after changing the ratio c of the pulse width of ScanPa to the pulse width of ScanPb provided by an embodiment of the present application;

[0038] Figure 4 is a schematic diagram of another display panel provided by an embodiment of the present application;

[0039] Figure 5 It is a schematic diagram of another driving circuit provided by an embodiment of the present application;

[0040] Figure 6 It is a schematic diagram of a display device provided by an embodiment of the present application. Detailed implementation manners

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying 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 of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0042] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0043] As mentioned in the background art, there are problems with the display effect of the OLED display panel. The applicant found through research that the reason for this problem is that in order to reduce the power consumption of the OLED display panel, the LTPO (Low Temperature Polycrystalline Oxide) technology came into being. However, when applied to a relatively low frame refresh rate, the display panel is prone to flicker, resulting in a poor display effect of the display panel.

[0044] An embodiment of the present application provides a display panel, Figure 1 It is a schematic diagram of a display panel provided by an embodiment of the present application, Figure 2 It is a schematic diagram of a pixel driving circuit provided by an embodiment of the present application. Referring to Figure 1 and Figure 2 , the display panel includes:

[0045] A scan driving circuit 10 and a plurality of pixel rows 20;

[0046] Each pixel row 20 includes a plurality of sub-pixels 21. Each sub-pixel 21 includes a pixel driving circuit 210 and a light-emitting diode 220. The pixel driving circuit 210 includes a driving module 211 and a data writing module 212. The first end of the data writing module 212 is electrically connected to a data line, the second end of the data writing module 212 is electrically connected to the first end of the driving module 211, and the control end of the data writing module 212 is electrically connected to the scan driving circuit 10. The data writing module 212 is configured to write a voltage corresponding to the data voltage Data to the control end of the driving module 211. The driving module 211 is configured to provide a driving current to the light-emitting diode 220 according to the voltage at the control end, driving the light-emitting diode 220 to emit light.

[0047] The pixel rows 20 include odd pixel rows 20a and even pixel rows 20b.

[0048] The scan driving circuit 10 is configured to output a first odd row scan signal ScanPa and a first even row scan signal ScanPb to the data writing modules 212 of the sub-pixels 21 of the odd pixel rows 20a and the data writing modules 212 of the sub-pixels 21 of the even pixel rows 20b respectively during the data writing phase. The pulse width of the first odd row scan signal ScanPa is different from the pulse width of the first even row scan signal ScanPb.

[0049] Among them, the light-emitting diode 220 may include an anode, a cathode, and an organic light-emitting layer disposed between the anode and the cathode. The pixel driving circuit 210 is configured to drive the light-emitting diode 220 to emit light. The scan driving circuit 10 is configured to output a scan signal, that is, to output a gate driving signal of the pixel driving circuit. Specifically, the scan signal may include signals for driving the scan line and the light-emitting control line. The scan driving circuit 10 may include a plurality of shift registers. The scan driving circuit 10 may be electrically connected to the control end of the data writing module 212 through the scan line 11. Exemplarily, the data writing module 212 of the sub-pixels 21 in the same pixel row 20 is electrically connected to the scan driving circuit 10 through the same scan line 11. Each display driving cycle may include a data writing stage and a light-emitting stage. In the data writing stage, the scan driving circuit 10 outputs a first scan signal ScanP (the first odd-row scan signal ScanPa and the first even-row scan signal ScanPb are collectively referred to as the first scan signal ScanP. The first scan signal corresponding to the sub-pixels 21 in the odd pixel row 20a is the first odd-row scan signal ScanPa, and the first scan signal corresponding to the sub-pixels 21 in the even pixel row 20b is the first even-row scan signal ScanPb) to the data writing module 212, so that the data voltage Data on the data line is written to the control end of the driving module 211 after passing through the data writing module 212, the driving module 211, and the compensation module 213. In the light-emitting stage, the driving module 211 provides a driving current to the light-emitting diode 220 to drive the light-emitting diode 220 to emit light.

[0050] The applicant has found through research that: usually, the pulse widths of the first scan signal ScanP corresponding to the data writing modules 212 of all sub-pixels 21 are set to be equal. However, due to reasons such as manufacturing processes, setting the pulse widths of the first scan signal ScanP corresponding to the data writing modules 212 of all sub-pixels 21 to be equal will result in differences in the voltages corresponding to the data voltage Data written at the control ends of the driving modules 211 during the data writing stage, which will affect the display effect of the screen during the light emitting stage. By changing the pulse width of the first odd-row scan signal ScanPa output by the scan driving circuit 10 to the data writing module 212 of the sub-pixels 21 in the odd pixel rows 20a during the data writing stage, or by changing the pulse width of the first even-row scan signal ScanPb output by the scan driving circuit 10 to the data writing module 212 of the sub-pixels 21 in the even pixel rows 20b during the data writing stage, or by simultaneously changing the pulse width of the first odd-row scan signal ScanPa output by the scan driving circuit 10 to the data writing module 212 in the odd pixel rows 20a and the pulse width of the first even-row scan signal ScanPb output to the data writing module 212 in the even pixel rows 20b during the data writing stage, such that the pulse width of the first odd-row scan signal ScanPa in the odd pixel rows 20a is different from the pulse width of the first even-row scan signal ScanPb in the even pixel rows 20b, the display effect of the display panel can be adjusted.

[0051] The ratio of the pulse width of ScanPa to the pulse width of ScanPb is set to c. Multiple different c values can be set, and the display panel is driven to display a picture at different c values respectively. An optical device is used to collect the brightness value of the display picture of the display panel, and the picture brightness change value FMA corresponding to each c value is calculated, where the brightness change value FMA = (maximum brightness - minimum brightness) / minimum brightness. Exemplarily, the display panel can be driven to display a picture of a preset gray level, and an optical device such as CA410, CS2000 or CS4000 is used to collect the display brightness on one side of the light-emitting surface of the display panel. Multiple brightness points can be collected continuously for a preset duration, and the preset duration can be more than ten seconds or a longer duration. The average brightness of each frame of the picture within the preset duration is calculated according to the brightness of multiple brightness points. The maximum value among the average brightness of each frame of the picture is used as the maximum brightness, and the minimum value is used as the minimum brightness. FMA is calculated according to the maximum brightness and the minimum brightness. In addition, the brightness corresponding to pictures of multiple preset gray levels can be collected, and the FMA corresponding to each preset gray level is calculated. The c value in the case where the FMA value corresponding to each preset gray level is relatively small can be used as the final ratio of the pulse width of ScanPa to the pulse width of ScanPb, or the c value in the case where the FMA corresponding to several preset gray levels that have the greatest impact on the display effect of the display panel is relatively small can be used as the final ratio of the pulse width of ScanPa to the pulse width of ScanPb. The preset gray levels can include gray levels such as 255, 128, 64, 32, 16, 10, and 8. Figure 3 is a graph showing the change of FMA after changing the ratio c of the pulse width of ScanPa to the pulse width of ScanPb provided by an embodiment of the present application. Refer to Figure 3 , the vertical axis represents FMA, and the horizontal axis is the c value. Figure 3 shows the change of FMA when the c value changes from c1 to c2 when the display panel displays pictures of 255, 128, 64, 32, 16, 10, and 8 gray levels. Refer to Figure 3 , when the c value changes from c1 to c2, FMA can be significantly reduced.

[0052] During the data writing phase, the scanning driving circuit 10 of the embodiment of the present application outputs first scanning signals with different pulse widths to the data writing modules 212 of the sub-pixels 21 in the odd pixel rows 20a and the data writing modules 212 of the sub-pixels 21 in the even pixel rows 20b respectively, so that the pulse widths of the actual first scanning signals output to the data writing modules 212 of the sub-pixels 21 in the odd pixel rows 20a and the data writing modules 212 of the sub-pixels 21 in the even pixel rows 20b are similar or equal. Thus, the actual conduction durations of the data writing modules 212 in the odd rows and the even rows during the data writing phase are similar or equal, thereby reducing the difference in the voltages written from the data voltages Data of the odd pixel rows 20a and the even pixel rows 20b to the control terminals of the driving modules 211 through the data writing modules 212 during the data writing phase, improving the brightness change when the display panel displays an image, that is, improving the flicker problem when the display panel displays an image at a lower frequency, and enhancing the display effect of the display panel.

[0053] Figure 4 is a schematic diagram of another display panel provided by the embodiment of the present application. Refer to Figure 2 and Figure 4 , the display panel further includes:

[0054] A driving chip 30, which is configured to determine the display mode of the display panel and send a control signal to the scanning driving circuit 10 according to the display mode; wherein, the minimum display brightness of different display modes is the same, and the maximum display brightness of different display modes is different;

[0055] The scanning driving circuit 10 is configured to output a first odd-row scanning signal ScanPa to the data writing module 212 of the sub-pixel 21 in the odd pixel row 20a and output a first even-row scanning signal ScanPb to the data writing module 212 of the sub-pixel 21 in the even pixel row 20b according to the control signal during the data writing phase, wherein the ratio of the pulse width of the first odd-row scanning signal ScanPa corresponding to different display modes to the pulse width of the first even-row scanning signal ScanPb is different.

[0056] Among them, the display panel may include multiple display modes. The display brightness ranges corresponding to different display modes are different. The lowest display brightnesses of different display modes are the same, and can all be 0 nit. The maximum display brightnesses of different display modes are different. For example, the maximum display brightness can be 2 nit, 10 nit, 50 nit, 100 nit, or 500 nit, etc. The grayscale ranges of different display modes are the same. For example, they can all be 0 - 255 grayscale. Therefore, the brightness corresponding to the same grayscale is different under different display modes, and the data voltage Data corresponding to the same grayscale is different under different display modes. Since the data voltage Data transmitted to the data writing module 212 is different under different display modes, by setting the ratios of the pulse widths of the first odd row scan signal ScanPa and the first even row scan signal ScanPb corresponding to different display modes to be different, the pulse widths of the first odd row scan signal ScanPa and the first even row scan signal ScanPb respectively adapt to their corresponding display modes, so that the voltage differences of the data voltage Data of the odd pixel rows 20a and the even pixel rows 20b written to the control end of the driving module 211 by the data writing module 212 are relatively small under each display mode, so that the display brightness change values of the display panel are relatively small under each display mode, and the display effects are all good.

[0057] It should be noted that the control signal can be a clock signal transmitted to the scan driving circuit 10. For example, the clock signal transmitted to the scan driving circuit 10 includes a first clock signal SCK1 and a second clock signal SCK2. The pulse width of the first scan signal output by the scan driving circuit 10 can be changed by changing the pulse widths of the first clock signal SCK1 and the second clock signal SCK2. After determining the display mode of the display panel, the driving chip 30 can determine the first clock signal SCK1 and the second clock signal SCK2 corresponding to the display mode, and output the corresponding first clock signal SCK1 and the second clock signal SCK2 to the scan driving circuit 10, so that the scan driving circuit 10 outputs the first odd row scan signal ScanPa to the odd pixel rows 20a respectively, and outputs the first even row scan signal ScanPb to the even pixel rows 20b.

[0058] Optionally, the driving chip 30 is used to obtain the position of the brightness adjustment bar in the display panel and determine the display mode according to the position of the brightness adjustment bar.

[0059] Specifically, a brightness adjustment bar is usually set in the display panel. Adjusting the position of the brightness adjustment bar can change the display mode. For example, in an environment with relatively low ambient brightness such as indoors, the position of the brightness adjustment bar can be adjusted so that the display panel displays the picture in a display mode with a relatively low maximum brightness. In an environment with relatively high ambient brightness such as outdoors, the position of the brightness adjustment bar can be adjusted so that the display panel displays the picture in a display mode with a relatively high maximum brightness. The driving chip 30 can determine the display mode of the display panel by obtaining the position of the brightness adjustment bar of the display panel, so that the display mode of the display panel can be determined quickly and accurately.

[0060] Optionally,

[0061] The pulse width of the first odd-row scan signal ScanPa and the pulse width of the first even-row scan signal ScanPb are determined according to the pulse width of the first odd-row scan signal ScanPa corresponding to multiple different preset gray levels and the pulse width of the first even-row scan signal ScanPb corresponding to multiple different preset gray levels.

[0062] Specifically, for each display mode, the reference brightness corresponding to the display mode can be determined first. The reference brightness of each display mode is the brightness corresponding to each preset gray level. The preset gray levels can include 255 gray levels, 128 gray levels, 64 gray levels, 32 gray levels, 16 gray levels, 10 gray levels, 8 gray levels, etc. The pulse width of ScanPa and the pulse width of ScanPb are adjusted respectively for each reference brightness, that is, the pulse width of ScanPa and the pulse width of ScanPb are adjusted respectively for each preset gray level of each display mode, and the display brightness under the reference brightness is collected through an optical device. A set of pulse widths of ScanPa and pulse widths of ScanPb are obtained for each reference brightness, so that the FMA under the reference brightness is within the preset range, and no brightness change can be observed when the human eye views the display picture of the reference brightness. Thus, the pulse widths of ScanPa and the pulse widths of ScanPb corresponding to multiple different reference brightnesses (i.e., multiple different preset gray levels) can be obtained for each display mode. The pulse widths of ScanPa and the pulse widths of ScanPb corresponding to the display mode can be determined through the pulse widths of ScanPa and the pulse widths of ScanPb corresponding to multiple different reference brightnesses.

[0063] The specific determination method can be to select a set of pulse widths from the pulse widths of ScanPa and the pulse widths of ScanPb corresponding to multiple different reference brightnesses. For example, the pulse widths corresponding to the reference brightness with relatively high requirements for the display picture can be selected. If the user has relatively high requirements for the FMA of the display picture corresponding to 128 gray levels, the pulse widths corresponding to 128 gray levels can be selected as the final pulse widths.

[0064] In addition, other determination methods can also be adopted. Optionally, the pulse widths of the first odd - row scanning signal ScanPa and the first even - row scanning signal ScanPb are determined by an interpolation algorithm according to the pulse widths of the first odd - row scanning signal ScanPa corresponding to multiple different preset gray levels and the pulse widths of the first even - row scanning signal ScanPb corresponding to multiple different preset gray levels.

[0065] Specifically, according to the user's requirements for the display screen, in each display mode, interpolation is performed on the pulse widths corresponding to any number of preset gray levels to obtain a set of pulse widths, and the pulse widths obtained by interpolation are used as the final pulse widths adopted by the display panel, so that the FMA of the brightness range with the highest frequency or the brightness range required by the user when the display panel displays the screen is minimized. For example, if the user has a relatively high requirement for the FMA of the display screen in the gray - level range of 128 - 255, interpolation can be performed on the pulse width corresponding to the 128th gray level and the pulse width corresponding to the 255th gray level to obtain a set of pulse widths. The set of pulse widths determined by the above method is used as the final pulse widths, that is, each gray level in this display mode adopts the final pulse widths, so that the FMA of the display panel is less than the first set value when displaying in the gray - level range of 128 - 255, and the FMA when displaying with other gray levels is less than the second set value, and the first set value is less than the second set value. In this way, the display effect of the display panel when displaying a higher - gray - level screen meets the higher requirements of the user, and the brightness change when displaying a lower - gray - level screen is also smaller.

[0066] This embodiment comprehensively considers the display effects under multiple different gray levels. According to the display requirements of the display panel, the final pulse widths of the first odd - row scanning signal ScanPa and the first even - row scanning signal ScanPb of the display panel are determined by the pulse widths of the first odd - row scanning signal ScanPa corresponding to multiple different gray levels and the pulse widths of the first odd - row scanning signal ScanPb, which can better meet the display requirements of the display panel and ensure that the display panel has a good display effect.

[0067] Optionally, continue to refer to Figure 2 and Figure 4 , the pixel driving circuit 210 further includes a compensation module 213 and a first initialization module 214; the first ends of both the compensation module 213 and the first initialization module 214 are electrically connected to the control end of the driving module 211, and the second end of the compensation module 213 is electrically connected to the second end of the driving module 211;

[0068] The control end of the compensation module 213 is electrically connected to the scanning driving circuit 10, and the control end of the first initialization module 214 is electrically connected to the scanning driving circuit 10;

[0069] The scan driving circuit 10 is further configured to output a second scan signal ScanN2 to the compensation module 213 during the data writing phase, and output a third scan signal ScanN1 to the first initialization module 214 during the initialization phase;

[0070] The pulse widths of the second scan signal ScanN2 for the odd pixel rows 20a and the even pixel rows 20b are equal, and the pulse widths of the third scan signal ScanN1 for the odd pixel rows 20a and the even pixel rows 20b are equal.

[0071] Among them, the compensation module 213 is used to perform threshold compensation on the driving module 211. The second terminal of the first initialization module 214 is used to receive the initialization signal Vref, and the first initialization module 214 is used to initialize the potential of the control terminal of the driving module 211. The applicant found through research that the pulse widths of the second scan signal ScanN2 and the third scan signal ScanN1 have little effect on reducing the brightness change value FAM of the display screen. By setting the pulse widths of the second scan signal ScanN2 for the odd pixel rows 20a and the even pixel rows 20b to be equal, and the pulse widths of the third scan signal ScanN1 for the odd pixel rows 20a and the even pixel rows 20b to be equal, the manufacturing difficulty of the scan driving circuit 10 can be reduced.

[0072] Optionally, the pixel driving circuit 10 further includes a second initialization module 215. The second initialization module 215 is used to initialize the first pole of the light emitting diode 220. The control terminal of the second initialization module 215 is electrically connected to the scan driving circuit 10;

[0073] The scan driving circuit 10 is further configured to output a first odd row scan signal ScanPa and a first even row scan signal ScanPb to the second initialization module of the sub-pixels of the odd pixel rows and the second initialization module 215 of the sub-pixels of the even pixel rows respectively during the data writing phase.

[0074] Among them, the first pole of the light emitting diode 220 may be the anode of the light emitting diode 220. The second initialization module 215 can be controlled by the same scan signal as the data writing module 212. During the data writing phase, the second initialization module 215 can be turned on simultaneously, so that the Vref signal is transmitted to the first pole of the light emitting diode 220 to realize the potential initialization of the first pole.

[0075] In addition, the pixel driving circuit 10 may further include a storage module 218, a first light emission control module 216, and a second light emission control module 217. The first end of the first light emission control module 216 and the first end of the storage module 218 are used to receive a first power signal VDD. The second end of the storage module 218 is electrically connected to the control end of the driving module 211. The storage module 218 is used to store the voltage of the control end of the driving module 211. The second pole of the light emitting diode 220 is connected to a second power signal VSS. During the light emitting stage, under the control of the light emission control signal Emit, the first light emission control module 216 and the second light emission control module 217 are turned on, and the driving module 211 outputs a driving current to the light emitting diode 220 to drive the light emitting diode 220 to emit light.

[0076] Figure 5 is a schematic diagram of another driving circuit provided by an embodiment of the present application. Refer to Figure 5 , the driving module 211 includes a driving transistor M1, the data writing module 212 includes a first P-type transistor M2, and the second initialization module 215 includes a second P-type transistor M5; the compensation module 213 includes a first N-type transistor M3, and the first initialization module 214 includes a second N-type transistor M4.

[0077] Specifically, the first scan signal ScanP may be a low-level pulse signal, and the pulse width of the first scan signal ScanP is the low-level pulse duration of the first scan signal ScanP. The second scan signal ScanN2 and the third scan signal ScanN1 may be high-level pulse signals, and the pulse widths of the second scan signal ScanN2 and the third scan signal ScanN1 are the high-level pulse durations of the second scan signal ScanN2 and the third scan signal ScanN1. The effective signal of the low-level pulse signal is the low-level pulse signal, and the effective signal of the high-level pulse signal is the high-level pulse signal. The effective signal is a signal that can turn on the corresponding module.

[0078] In addition, refer to Figure 5 , the first light emission control module 216 includes a first transistor M6, the second light emission control module 217 includes a second transistor M7, and the storage module 218 includes a capacitor C11.

[0079] It should be noted that Figure 5 only exemplarily shows a pixel driving circuit, which is not a limitation to the present application. The solution of the embodiment of the present application can also be applied to other pixel driving circuits.

[0080] An embodiment of the present application also provides a display device, Figure 6 is a schematic diagram of a display device provided by an embodiment of the present application. Refer to Figure 6, the display device 100 includes the display panel 200 described in any embodiment of the present application. The display device 100 can be an electronic device such as a mobile phone or a tablet.

[0081] An embodiment of the present application also provides a driving method for a display panel. Refer to Figure 1 and Figure 2 , the display panel includes a scan driving circuit 10 and a plurality of pixel rows 20; each pixel row 20 includes a plurality of sub-pixels 21, and each sub-pixel 21 includes a pixel driving circuit 210 and a light-emitting diode 220. The pixel driving circuit 210 includes a driving module 211 and a data writing module 212; a first end of the data writing module 212 is electrically connected to a data line, a second end of the data writing module 212 is electrically connected to a first end of the driving module 211, and a control end of the data writing module 212 is electrically connected to the scan driving circuit 10; the data writing module 212 is configured to write a voltage corresponding to a data voltage Data to a control end of the driving module 211, and the driving module 211 is configured to provide a driving current to the light-emitting diode 220 according to the voltage at the control end to drive the light-emitting diode 220 to emit light; the pixel row 20 includes an odd pixel row 20a and an even pixel row 20b;

[0082] The driving method includes:

[0083] During a data writing stage, the scan driving circuit outputs a first odd row scan signal and a first even row scan signal to the data writing modules of the sub-pixels of the odd pixel row and the data writing modules of the sub-pixels of the even pixel row respectively. Optionally, the driving method further includes:

[0084] The driving chip determines the display mode of the display panel and sends a control signal to the scan driving circuit according to the display mode; wherein, the minimum display brightness of different display modes is the same, and the maximum display brightness of different display modes is different;

[0085] During the data writing stage, the scan driving circuit outputs a first odd row scan signal to the data writing module of the sub-pixel of the odd pixel row and outputs a first even row scan signal to the data writing module of the sub-pixel of the even pixel row according to the control signal, wherein the ratio of the pulse width of the first odd row scan signal and the pulse width of the first even row scan signal corresponding to different display modes is different.

[0086] Optionally, the driving chip determines the display mode of the display panel including:

[0087] The driving chip obtains the position of the brightness adjustment bar in the display panel and determines the display mode according to the position of the brightness adjustment bar.

[0088] Optionally, the pulse width of the first odd-row scanning signal and the pulse width of the first even-row scanning signal are determined according to the pulse width of the first odd-row scanning signal corresponding to multiple different preset gray levels and the pulse width of the first even-row scanning signal corresponding to multiple different preset gray levels.

[0089] Optionally, the pulse width of the first odd-row scanning signal and the pulse width of the first even-row scanning signal are determined by an interpolation algorithm according to the pulse width of the first odd-row scanning signal corresponding to multiple different preset gray levels and the pulse width of the first even-row scanning signal corresponding to multiple different preset gray levels. Optionally, the driving method further includes:

[0090] The scan driving circuit outputs a second scan signal to the compensation module during the data writing stage and outputs a third scan signal to the first initialization module during the initialization stage;

[0091] Wherein, the pulse widths of the second scan signals of the odd pixel rows and the even pixel rows are equal, and the pulse widths of the third scan signals of the odd pixel rows and the even pixel rows are equal.

[0092] Optionally, the driving method further includes: the scan driving circuit outputs the first odd-row scanning signal and the first even-row scanning signal to the second initialization module of the sub-pixels of the odd pixel rows and the second initialization module of the sub-pixels of the even pixel rows respectively during the data writing stage.

[0093] It should be understood that the various forms of the flow shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this application can be achieved, and no limitation is imposed herein.

[0094] The above specific embodiments do not constitute a limitation on the protection scope of this 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 modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, Including: A scan driving circuit and a plurality of pixel rows; Each of the pixel rows includes a plurality of sub-pixels, and each of the sub-pixels includes a pixel driving circuit and a light-emitting diode. The pixel driving circuit includes a driving module and a data writing module. The first end of the data writing module is electrically connected to a data line, the second end of the data writing module is electrically connected to the first end of the driving module, and the control end of the data writing module is electrically connected to the scan driving circuit. The data writing module is configured to write a voltage corresponding to a data voltage to the control end of the driving module, and the driving module is configured to provide a driving current to the light-emitting diode according to the voltage at the control end to drive the light-emitting diode to emit light; The pixel rows include odd pixel rows and even pixel rows; The scan driving circuit is configured to output a first odd-row scan signal and a first even-row scan signal to the data writing modules of the sub-pixels of the odd pixel rows and the data writing modules of the sub-pixels of the even pixel rows respectively during a data writing stage, and the pulse width of the first odd-row scan signal is different from the pulse width of the first even-row scan signal.

2. The display panel according to claim 1, wherein Further including: A driving chip, which is configured to determine a display mode of the display panel and send a control signal to the scan driving circuit according to the display mode; wherein, the minimum display brightness of different display modes is the same, and the maximum display brightness of different display modes is different; The scan driving circuit is configured to output the first odd-row scan signal to the data writing module of the sub-pixels of the odd pixel rows and output the first even-row scan signal to the data writing module of the sub-pixels of the even pixel rows during a data writing stage according to the control signal, wherein, the ratio of the pulse width of the first odd-row scan signal corresponding to different display modes to the pulse width of the first even-row scan signal is different.

3. The display panel according to claim 1, wherein: The pulse width of the first odd-row scan signal and the pulse width of the first even-row scan signal are determined according to the pulse width of the first odd-row scan signal corresponding to a plurality of different preset gray levels and the pulse width of the first even-row scan signal corresponding to the plurality of different preset gray levels.

4. The display panel according to claim 3, wherein: The pulse width of the first odd-row scan signal and the pulse width of the first even-row scan signal are determined by an interpolation algorithm according to the pulse width of the first odd-row scan signal corresponding to a plurality of different preset gray levels and the pulse width of the first even-row scan signal corresponding to the plurality of different preset gray levels.

5. The display panel according to claim 1, wherein: The pixel driving circuit further includes a compensation module and a first initialization module; the first end of the compensation module and the first end of the first initialization module are both electrically connected to the control end of the driving module, and the second end of the compensation module is electrically connected to the second end of the driving module; The control terminal of the compensation module is electrically connected to the scan driving circuit, and the control terminal of the first initialization module is electrically connected to the scan driving circuit; The scan driving circuit is further configured to output a second scan signal to the compensation module during the data writing stage, and output a third scan signal to the first initialization module during the initialization stage; The pulse widths of the second scan signals of the odd pixel rows and the even pixel rows are equal, and the pulse widths of the third scan signals of the odd pixel rows and the even pixel rows are equal.

6. The display panel according to claim 5, wherein: The pixel driving circuit further includes a second initialization module, and the second initialization module is configured to initialize a first pole of the light-emitting diode. The control terminal of the second initialization module is electrically connected to the scan driving circuit; The scan driving circuit is further configured to output the first odd row scan signal and the first even row scan signal to the second initialization modules of the sub-pixels of the odd pixel rows and the sub-pixels of the even pixel rows respectively during the data writing stage.

7. The display panel according to claim 6, wherein: The driving module includes a driving transistor, the data writing module includes a first P-type transistor, and the second initialization module includes a second P-type transistor; the compensation module includes a first N-type transistor, and the first initialization module includes a second N-type transistor.

8. The display panel according to claim 2, wherein: The driving chip is configured to obtain the position of the brightness adjustment bar in the display panel and determine the display mode according to the position of the brightness adjustment bar.

9. A display device, characterized in that, Including the display panel according to any one of claims 1-8.

10. A driving method for a display panel, characterized in that, The display panel includes a scan driving circuit and a plurality of pixel rows; Each of the pixel rows includes a plurality of sub-pixels, and each of the sub-pixels includes a pixel driving circuit and a light-emitting diode. The pixel driving circuit includes a driving module and a data writing module; a first end of the data writing module is electrically connected to a data line, a second end of the data writing module is electrically connected to a first end of the driving module, and a control terminal of the data writing module is electrically connected to the scan driving circuit; the data writing module is configured to apply a voltage corresponding to the written data voltage to the control terminal of the driving module, and the driving module is configured to provide a driving current to the light-emitting diode according to the voltage at the control terminal to drive the light-emitting diode to emit light; The pixel rows include odd pixel rows and even pixel rows; The driving method includes: The scan driving circuit outputs a first odd row scan signal and a first even row scan signal to the data writing modules of the sub-pixels of the odd pixel rows and the data writing modules of the sub-pixels of the even pixel rows respectively during the data writing stage, and the pulse width of the first odd row scan signal is different from the pulse width of the first even row scan signal.

11. The method according to claim 10, characterized in that, Further including: The driving chip determines the display mode of the display panel and sends a control signal to the scan driving circuit according to the display mode; wherein, the minimum display brightness of different display modes is the same, and the maximum display brightness of different display modes is different; The scan driving circuit outputs the first odd-row scan signal to the data writing module of the sub-pixels of the odd pixel rows and outputs the first even-row scan signal to the data writing module of the sub-pixels of the even pixel rows during the data writing stage according to the control signal, wherein the ratio of the pulse width of the first odd-row scan signal corresponding to different display modes to the pulse width of the first even-row scan signal is different.

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