Driving method, device and brightness compensation method of display panel and display device

Abstract

The application discloses a display panel driving method, a display panel driving device, a display panel brightness compensation method and a display device. The display panel brightness compensation method comprises the following steps: determining the target cathode voltage corresponding to each brightness level in the voltage range of the display panel and the target anode initialization voltage according to the difference between the target cathode voltage and the theoretical cathode voltage corresponding to the preset brightness level; adjusting the target anode initialization voltage input in the write frame stage or the hold frame stage when driving the display panel to display each brightness level until the brightness difference between the write frame stage and the hold frame stage of the display panel is less than the preset brightness difference, so as to determine the difference between the target anode initialization voltages corresponding to each brightness level; and determining the configuration parameter mapping table matched with the voltage range of the display panel according to the difference between the target anode initialization voltages of each brightness level in the write frame stage and the hold frame stage. The technical scheme provided by the application improves the display effect of the display panel.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display, and in particular, to a driving method and device of a display panel, a brightness compensation method and a display device. BACKGROUND

[0002] With the development of display technology, people have higher and higher requirements on the display performance of display panels.

[0003] At present, the display effect of the display panel is poor, which cannot meet the high-quality display requirement. SUMMARY

[0004] Embodiments of the present application provide a driving method and device of a display panel, a brightness compensation method and a display device, so as to improve the display effect of the display panel.

[0005] According to an aspect of the present application, a brightness compensation method of a display panel is provided, comprising:

[0006] determining a target cathode voltage input to a cathode of a light-emitting device of the display panel under a preset brightness level;

[0007] determining a target cathode voltage corresponding to each brightness level in a voltage range of the display panel and a target anode initialization voltage according to a difference between the target cathode voltage and a theoretical cathode voltage corresponding to the preset brightness level;

[0008] inputting the target cathode voltage and the target anode initialization voltage corresponding to each brightness level to the light-emitting device of the display panel in sequence, so as to drive the display panel to display each brightness level in sequence; and during the display of each brightness level,

[0009] adjusting the target anode initialization voltage input in the write frame stage or in the hold frame stage until a difference between the brightness of the display panel in the write frame stage and the brightness in the hold frame stage is less than a preset brightness difference, and determining a difference between the target anode initialization voltage input to the anode of the light-emitting device in the write frame stage and the hold frame stage;

[0010] determining a configuration parameter mapping table matched with the voltage range of the display panel according to the difference between the target anode initialization voltage in the write frame stage and the hold frame stage of each brightness level.

[0011] Optionally, the determining of the target cathode voltage input to the cathode of the light-emitting device of the display panel under the preset brightness level comprises:

[0012] inputting the theoretical cathode voltage corresponding to the maximum brightness level to the cathode of the light-emitting device of the display panel and performing gamma adjustment to obtain a gamma voltage of each binding point gray scale; the preset brightness level is the maximum brightness level;

[0013] inputting a preset gray scale gamma voltage to a pixel driving circuit of the display panel, and sequentially inputting a theoretical cathode voltage corresponding to the maximum brightness level and n candidate voltages to cathodes of light emitting devices of the display panel; n is an integer greater than or equal to 1;

[0014] respectively collecting brightness values of the display panel when the theoretical cathode voltage and the n candidate voltages are inputted;

[0015] determining a target cathode voltage corresponding to the maximum brightness level of the display panel from the theoretical cathode voltage and the n candidate voltages according to the brightness values.

[0016] Optionally, the determining of the target cathode voltage corresponding to the maximum brightness level of the display panel from the theoretical cathode voltage and the n candidate voltages according to the brightness values comprises:

[0017] composing each two adjacent voltages and corresponding brightness values in the theoretical cathode voltage and the n candidate voltages into a calculation unit;

[0018] determining a brightness slope according to a ratio of a difference between two brightness values and a difference between two voltages in each calculation unit;

[0019] determining a target calculation unit according to a preset brightness slope condition and a brightness slope corresponding to each calculation unit;

[0020] determining a voltage with a smaller absolute value of the two voltages in the target calculation unit as the target cathode voltage corresponding to the maximum brightness level of the display panel.

[0021] Optionally, the determining of the target cathode voltage corresponding to each brightness level in the voltage range of the display panel and the target anode initialization voltage according to a difference between the target cathode voltage corresponding to the preset brightness level and the theoretical cathode voltage comprises:

[0022] determining the voltage range of the display panel according to a range to which the target cathode voltage corresponding to the maximum brightness level of the display panel belongs; wherein, the preset brightness level is the maximum brightness level of the display panel.

[0023] obtaining a voltage compensation value according to a difference between the theoretical cathode voltage and the target cathode voltage corresponding to the maximum brightness level of the display panel;

[0024] respectively determining the target cathode voltage corresponding to each brightness level other than the maximum brightness level of the display panel according to the voltage compensation value and the theoretical cathode voltage corresponding to each brightness level other than the maximum brightness level of the display panel; and

[0025] The target anode initialization voltage of each brightness level is determined according to the theoretical anode initialization voltage corresponding to each brightness level of the display panel and the voltage compensation value.

[0026] Optionally, the adjusting the target anode initialization voltage input in the write frame stage or the holding frame stage until the difference between the brightness in the write frame stage and the brightness in the holding frame stage is less than the preset brightness difference and determining the difference between the target anode initialization voltage input to the anode of the light emitting device in the write frame stage and the holding frame stage comprises:

[0027] In each brightness level, the refresh frequency of the display panel is switched, and after each time the refresh frequency is switched, the anode initialization voltage input to the anode of the light emitting device in the write frame stage is kept unchanged at the target anode initialization voltage, the target anode initialization voltage input to the anode of the light emitting device in the holding frame stage is adjusted until the difference between the brightness in the write frame stage and the brightness in the holding frame stage is less than the preset brightness difference, so as to determine the difference between the target anode initialization voltage in the write frame stage and the holding frame stage of the display panel corresponding to the current brightness level and the current refresh frequency;

[0028] The configuration parameter mapping table matched with the voltage gear of the display panel is determined according to the difference between the target anode initialization voltage in the write frame stage and the holding frame stage of each brightness level.

[0029] The configuration parameter mapping table matched with the voltage gear of the display panel is determined according to the difference between the target anode initialization voltage in the write frame stage and the holding frame stage corresponding to each refresh frequency of the display panel in each brightness level.

[0030] Optionally, the voltage slice adjustment method of the display panel further comprises: obtaining configuration parameter mapping tables corresponding to at least two different voltage gears; and determining a configuration parameter mapping table corresponding to at least one intermediate voltage slice adjustment gear based on an interpolation method and according to the configuration parameter mapping tables corresponding to the at least two different voltage gears.

[0031] According to another aspect of the present application, a display panel driving method is provided, comprising:

[0032] Obtaining a configuration parameter mapping table of the voltage of the display panel; the configuration parameter mapping table of the display panel is determined based on the brightness compensation method of the display panel in any embodiment of the present application;

[0033] Determining the current display parameter of the display panel;

[0034] Obtaining a target anode initialization voltage difference from the configuration parameter mapping table according to the current display parameter;

[0035] controlling an anode initialization voltage input to an anode of a light emitting device of the display panel in a write frame phase, and controlling a difference of the anode initialization voltage input to the anode of the light emitting device of the display panel in a hold frame phase to satisfy the target anode initialization voltage difference.

[0036] Optionally, the current display parameter includes a current brightness level and / or a current refresh frequency of the display panel; and the obtaining of the target initialization voltage difference from the configuration parameter mapping table according to the current display parameter includes:

[0037] obtaining a target initialization voltage difference from the configuration parameter mapping table according to the current brightness level and / or the current refresh frequency;

[0038] Preferably, the number of brightness levels of the display panel is plural, and the number of refresh frequencies of the display panel is plural; and the obtaining of the target anode initialization voltage difference from the configuration parameter mapping table according to the current brightness level and / or the current refresh frequency includes:

[0039] querying and obtaining a corresponding target anode initialization voltage difference from the configuration parameter mapping table according to an index composed of the current brightness level and the current refresh frequency; and the configuration parameter mapping table stores target anode initialization voltage differences corresponding to different refresh frequencies under different brightness levels.

[0040] Preferably, the configuration parameter mapping table is stored in a driving device of the display panel.

[0041] Preferably, before the difference of the anode initialization voltage input to the anode of the light emitting device of the display panel in the write frame phase and the anode initialization voltage input to the anode of the light emitting device of the display panel in the hold frame phase satisfies the target anode initialization voltage difference, the method further includes:

[0042] determining the anode initialization voltage input to the anode of the light emitting device of the display panel in the write frame phase according to the current brightness level of the display panel;

[0043] determining the anode initialization voltage input to the anode of the light emitting device of the display panel in the hold frame phase according to the difference of the anode initialization voltage input to the anode of the light emitting device of the display panel in the write frame phase and the target initialization voltage difference.

[0044] According to another aspect of the present application, a driving device of a display panel is provided, including:

[0045] The display parameter determination unit is configured to determine a current display parameter of the display panel; the acquisition unit is configured to acquire a configuration parameter mapping table matched with a voltage level of the display panel, and acquire a target anode initialization voltage difference from the configuration parameter mapping table according to the current display parameter; different configuration parameter mapping tables correspond to different voltage levels; and the control unit is configured to control a difference between an anode initialization voltage input to an anode of a light emitting device of the display panel in a write frame stage and an anode initialization voltage input to the anode of the light emitting device of the display panel in a hold frame stage to satisfy the target anode initialization voltage difference.

[0046] According to another aspect of the present application, a display device is provided, comprising a display panel and a display panel driving device according to any of the embodiments of the present application, wherein the display panel driving device stores a configuration parameter mapping table determined based on the brightness compensation method of the display panel according to any of the embodiments of the present application.

[0047] The technical solution provided by the embodiments of the present application adjusts the initialization voltage input to the display panel in the write frame stage and the difference between the anode initialization voltage input to the display panel in the hold frame stage by using the configuration parameter mapping table matched with the voltage level of the display panel, reduces the brightness difference between the write frame stage and the hold frame stage of the display panel, improves the problem of static flashing of the display panel, and thus improves 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 through 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 embodiments will be briefly introduced as follows. 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 effort.

[0050] Figure 1 is a flowchart of a display panel driving method provided by the embodiments of the present application;

[0051] Figure 2 is a schematic diagram of a frame length when the refresh frequency of a display panel is 120Hz provided by the embodiments of the present application;

[0052] Figure 3 is a structural schematic diagram of a display device provided by the embodiments of the present application;

[0053] Figure 4is a circuit diagram of a pixel circuit provided by an embodiment of the present application;

[0054] Figure 5 is a flow chart of another driving method of a display panel provided by an embodiment of the present application;

[0055] Figure 6 is a contrast diagram of a frame length when the refresh frequency of a display panel is 120Hz and 60Hz provided by an embodiment of the present application;

[0056] Figure 7 is a contrast diagram of the difference of anode initialization voltage input in the writing frame stage and the holding frame stage when the refresh frequency of a display panel is 120Hz and 60Hz provided by an embodiment of the present application;

[0057] Figure 8 is a flow chart of another driving method of a display panel provided by an embodiment of the present application;

[0058] Figure 9 is a flow chart of a voltage slice method of a display panel provided by an embodiment of the present application;

[0059] Figure 10 is a cathode voltage-brightness relationship curve diagram of three sample panels;

[0060] Figure 11 is a structure block diagram of a driving device of a display panel provided by an embodiment of the present application. DETAILED DESCRIPTION

[0061] 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, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person of ordinary skill in the art without making creative efforts should belong to the protection scope of the present application.

[0062] It should be noted that the terms "first", "second", and the like in the description and claims of the application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in other than the order illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a list of steps or units does not necessarily limit those steps or units to the clearly listed ones, but can include other steps or units not clearly listed or inherent to such processes, methods, products or devices.

[0063] The embodiment of the application provides a driving method of a display panel, Figure 1 is a flow chart of the driving method of the display panel provided by the embodiment of the application, referring to Figure 1 The driving method of the display panel comprises the following steps.

[0064] S110, acquiring a configuration parameter mapping table matched with a voltage gear of the display panel.

[0065] The configuration parameter mapping table matched with the voltage gear of the display panel is determined based on the brightness compensation method of the display panel described in any of the following embodiments.

[0066] Specifically, due to the differences in resolution, pixel circuit, signal transmission line resistance value and the like of different display panels, the voltages adapted to different display panels are different, for example, the sizes of cathode voltage ELVSS and initialization voltage are different. According to the characteristics of the display panel, a plurality of voltage gears can be set, for example, voltage gear A, voltage gear B and voltage gear C. If the characteristics of two display panels are not much different, or the characteristics of two display panels are the same, the voltage gears of the two display panels are the same. If the characteristics of two display panels are quite different, the voltage gears of the two display panels are different. The judgment condition of the characteristic difference can be set according to the actual situation. The voltage gears of different display panels can be the same, and the voltage gears of different display panels can also be different. However, the configuration parameter mapping tables corresponding to different voltage gears are different, so the configuration parameter mapping tables corresponding to different display panels can be the same, and the configuration parameter mapping tables corresponding to different display panels can also be different.

[0067] S120, determining a current display parameter of the display panel.

[0068] S130, acquiring a target anode initialization voltage difference value from the configuration parameter mapping table according to the current display parameter.

[0069] Specifically, the configuration parameter mapping table records at least a target anode initialization voltage difference of the display panel in different working scenarios, i.e., a target anode initialization voltage difference. Different configuration parameter mapping tables can be understood as at least one working scenario, and the target anode initialization voltage difference recorded in different configuration parameter mapping tables is different. The display parameters of the display panel are different in different working scenarios. The display parameters include a refresh screen rate and / or a brightness level of the display panel. In different working scenarios, at least one of the refresh screen rate of the display panel and the brightness level of the display panel is different. Therefore, the current display parameters include the current brightness level of the display panel, or the current refresh frequency, or the current brightness level and the current refresh frequency. After determining the current display parameters of the display panel, the target anode initialization voltage difference can be obtained from the configuration parameter mapping table according to the current display parameters.

[0070] S140, the difference between the anode initialization voltage input to the anode of the light emitting device of the display panel in the write frame stage and the anode initialization voltage input to the anode of the light emitting device of the display panel in the hold frame stage meets the target anode initialization voltage difference.

[0071] Specifically, the time of one frame (one picture refresh period) includes a write frame stage and a hold frame stage, wherein the hold frame stage can be understood as a vertical blanking stage. After the display panel displays a picture in one frame, display data needs to be prepared for the display of the next frame, and the duration of the vertical blanking stage can be used to prepare display data for the display of the next frame. Exemplarily, Figure 2 is a schematic diagram of the time of one frame when the refresh frequency of the display panel is 120Hz, with reference to Figure 2 When the picture refresh frequency of the display panel is the maximum refresh frequency, for example, 120Hz, one picture refresh period (equivalent to one frame) includes a write frame stage and a hold frame stage. The write frame stage includes a data voltage vdata write stage; and the hold frame stage has no data voltage vdata write stage. In the write frame stage, data voltage vdata is written to the first pixel row to the last pixel row of the display panel in sequence.

[0072] After the target anode initialization voltage difference is obtained, the anode initialization voltage input to the anode of the light emitting device of the display panel in the write frame stage is adjusted according to the target anode initialization voltage difference, or the anode initialization voltage input to the anode of the light emitting device of the display panel in the hold frame stage is adjusted, so that the difference between the anode initialization voltage input to the display panel in the write frame stage and the anode initialization voltage input to the display panel in the hold frame stage meets the target anode initialization voltage difference. In the case that the difference between the anode initialization voltage input to the anode of the light emitting device of the display panel in the write frame stage and the anode initialization voltage input to the anode of the light emitting device of the display panel in the hold frame stage meets the target anode initialization voltage difference, the luminance difference of the display panel in the write frame stage and in the hold frame stage can be reduced, thereby improving the problem of static flicker of the display panel, and thus the display effect of the display panel is improved.

[0073] The driving method of the display panel provided by the embodiment of the present application adjusts the difference between the initialization voltage input to the display panel in the write frame stage and the initialization voltage input to the display panel in the hold frame stage by using the configuration parameter mapping table matched with the voltage level of the display panel, reduces the luminance difference of the display panel in the write frame stage and in the hold frame stage, thereby improving the problem of static flicker of the display panel, and improving the display effect of the display panel. The same configuration parameter mapping table is prevented from being shared by display panels of different voltage levels, so that the demand for improving the static flicker of all display panels cannot be met.

[0074] On the basis of the above-mentioned embodiment, optionally, Figure 3 is a structural schematic diagram of a display device provided by the embodiment of the present application, for reference Figure 3The display device includes a display panel, and the display panel includes an array substrate and a light emitting device layer disposed on the array substrate. The array substrate refers to a film layer structure capable of providing a driving signal for the display device and playing a role of buffering, protection or support, and includes a substrate and a pixel circuit layer disposed on the substrate. The pixel circuit layer includes a plurality of pixel circuit units arranged in an array, and further includes a plurality of data signal lines (D1 to Dr), a plurality of scanning signal lines (S1 to Sq) for controlling writing of a data voltage, and a plurality of light emitting control signal lines (E1 to Eo). The display device further includes a data driver 300, a scanning driver 100 and a light emitting control driver 200. The data driver 300 is connected to the plurality of data signal lines (D1 to Dr) respectively, the scanning driver 100 is connected to the plurality of scanning signal lines (S1 to Sq) respectively, and the light emitting control pixel circuit 200 is connected to the plurality of light emitting control signal lines (E1 to Eo) respectively. The light emitting device layer includes a plurality of light emitting devices, and the pixel circuit unit and the corresponding connected light emitting device constitute a sub-pixel. A plurality of sub-pixels Pxij are arranged in an array, and i and j are non-zero natural numbers. The pixel circuit unit is connected to the scanning signal line, the light emitting control signal line and the data signal line respectively. The data signal line is configured to provide a data voltage vdata to the pixel circuit unit, the scanning signal line is configured to provide a scanning signal SP1 for controlling writing of the data voltage to the pixel circuit unit, and the light emitting control signal line is configured to provide a light emitting control signal EM to the pixel circuit unit, so as to realize light emitting control of the light emitting device. The pixel circuit unit includes a pixel circuit, and the pixel circuit can be a “7T1C” pixel circuit, an “8T1C” pixel circuit, a “9T1C” pixel circuit, a “10T1C” pixel circuit or the like.

[0075] Exemplarily, Figure 4 is a circuit diagram of a pixel circuit provided by an embodiment of the present application, Figure 3 The pixel circuit is an “8T1C” pixel circuit. For reference Figure 4 The pixel circuit includes a first initialization transistor T7, a first electrode of the first initialization transistor T7 is electrically connected to an anode of the light emitting device D, a second electrode of the first initialization transistor T7 is used for receiving an anode initialization voltage Vrefn2, a gate electrode of the first initialization transistor T7 is used for receiving a first gate signal SP2, the first gate signal SP2 is used for controlling a conduction state of the first initialization transistor T7, and the anode initialization voltage Vrefn2 is input to the anode of the light emitting device D when the first initialization transistor T7 is turned on.

[0076] The pixel circuit further comprises a driving transistor T1 and a second initialization transistor T8. The driving transistor T1 is configured to output a driving current to the light emitting device D. The second initialization transistor T8 is electrically connected to the first electrode of the driving transistor T1 (in the example shown in the figure, the second initialization transistor T8 is electrically connected to the source S of the driving transistor T1, and the second initialization transistor T8 is electrically connected to the drain D of the driving transistor T1), so as to transmit the first electrode initialization voltage VrefP to the first electrode of the driving transistor T1, and initialize the first electrode of the driving transistor T1. The gate of the second initialization transistor T8 is connected to the first gate signal SP2, which can be the same control signal as the first initialization transistor T7.

[0077] The pixel circuit further comprises a data writing transistor T2 and a compensation transistor T3. The data writing transistor T2 is electrically connected to the first electrode of the driving transistor T1. The compensation transistor T3 is connected between the gate and the second electrode of the driving transistor T1. The gate of the data writing transistor T2 is connected to the scanning signal SP1. The data writing transistor T2 is configured to transmit the data voltage vdata to the first electrode of the driving transistor T1 in a data writing stage.

[0078] The pixel circuit further comprises a storage capacitor Cst configured to store the gate voltage of the driving transistor T1, and a third initialization transistor T4. The third initialization transistor T4 is electrically connected to the gate G of the driving transistor T1 through the compensation transistor T3, and is configured to initialize the gate potential of the driving transistor T1. The gate of the third initialization transistor T4 is controlled by the scanning signal SN2 and the scanning signal SN1 respectively through the gate of the compensation transistor T3.

[0079] The pixel circuit further comprises a first light emitting control transistor T5 and a second light emitting control transistor T6. The first light emitting control transistor T5 is connected between the first power supply and the first electrode of the driving transistor T1, and the first power supply is configured to input the voltage ELVDD to the first electrode of the driving transistor T1. The second light emitting control transistor T6 is connected between the second electrode of the driving transistor T1 and the anode of the light emitting device D. The cathode of the light emitting device is connected to the second power supply, and the second power supply is configured to input the cathode voltage ELVSS to the cathode of the light emitting device. The gate of the first light emitting control transistor T5 and the gate of the second light emitting control transistor T6 receive the same light emitting control signal EM.

[0080] On the basis of the above-mentioned embodiments, optionally, the current display parameter comprises a current brightness level and / or a current refresh frequency of the display panel; and the step S130 of obtaining the target initialization voltage difference from the configuration parameter mapping table according to the current display parameter comprises: obtaining the target initialization voltage difference from the configuration parameter mapping table according to the current brightness level and / or the current refresh frequency.

[0081] When the number of brightness levels of the display panel is multiple, and the number of refresh frequencies of the display panel is multiple, the target initialization voltage difference value can be obtained from the configuration parameter mapping table according to the current brightness level and the current refresh frequency. Figure 5 is a flowchart of another driving method of a display panel provided by an embodiment of the present application, referring to Figure 5 , the driving method of the display panel comprises:

[0082] S210, obtaining a configuration parameter mapping table matched with the voltage level of the display panel; wherein the configuration parameter mapping tables corresponding to different voltage levels are different.

[0083] S220, determining the current brightness level and the current refresh frequency of the display panel.

[0084] S230, querying and obtaining the corresponding target anode initialization voltage difference value from the configuration parameter mapping table according to the index composed of the current brightness level and the current refresh frequency.

[0085] S240, controlling the difference between the anode initialization voltage input to the anode of the light emitting device of the display panel in the write frame stage and the anode initialization voltage input to the anode of the light emitting device of the display panel in the holding frame stage to meet the target anode initialization voltage difference value.

[0086] Specifically, from the minimum brightness of the display panel to the maximum brightness of the display panel can be divided into m brightness sections, the number of brightness levels of the display panel is m, and m is an integer greater than or equal to 2. Exemplarily, the brightness levels can be provided with a first brightness level, a second brightness level, and a third brightness level; wherein the minimum brightness of the second brightness level is greater than or equal to the maximum brightness of the first brightness level, and the minimum brightness of the third brightness level is greater than or equal to the maximum brightness of the second brightness level. Under different brightness levels, the cathode voltage ELVSS input to the cathode of the light emitting device D in the same display panel is different; for two display panels of different voltage levels, the cathode voltage ELVSS input to the same brightness level of the two display panels is different.

[0087] Under different brightness levels, the anode initialization voltage Vrefn2 (including the anode initialization voltage input in the write frame stage and / or the anode initialization voltage input in the holding frame stage) input to the anode of the light emitting device D in the same display panel is different; for two display panels of different voltage levels, the anode initialization voltage Vrefn2 (including the anode initialization voltage Vrefn2 input in the write frame stage and / or the anode initialization voltage Vrefn2 input in the holding frame stage) input to the same brightness level of the two display panels is different.

[0088] In addition, for the same display panel, the anode initialization voltage Vrefn2 input to the display panel in the holding frame stage can be the same or different for different refresh frequencies of the same brightness level. The anode initialization voltage Vrefn2 input to the display panel in the writing frame stage and the anode initialization voltage Vrefn2 input to the display panel in the holding frame stage can be different for different brightness levels of the same refresh frequency.

[0089] Figure 6 is a contrast chart of the time length of a frame of a display panel when the refresh frequency is 120Hz and 60Hz, with reference to Figure 6 , when the picture refresh frequency of the display panel is the maximum refresh frequency, for example, 120Hz, a picture refresh cycle (equivalent to a frame) includes a writing frame stage and a holding frame stage. The writing frame stage can include a data voltage vdata writing stage; the holding frame stage has no data voltage vdata writing stage. When the picture refresh frequency of the display panel is less than the maximum refresh frequency, for example, 60Hz, a picture refresh cycle (equivalent to a frame) can include a writing frame stage and a holding frame stage. The writing frame stage includes a data writing stage; the holding frame has no data voltage vdata writing stage. The time length of the writing frame stage at 60Hz is equal to the time length of the writing frame stage at 120Hz; the time length of the holding frame stage at 60Hz is greater than the time length of the holding frame stage at 120Hz, and the time length of the holding frame stage at 60Hz is the sum of the time length of a frame at 120Hz and the time length of the holding frame stage at 120Hz.

[0090] For the display panel in the voltage A grade, 120Hz refresh and 60Hz refresh are respectively performed at the same brightness level. Figure 7 is a contrast chart of the difference between the anode initialization voltage input in the writing frame stage and the anode initialization voltage input in the holding frame stage of a display panel when the refresh frequency is 120Hz and 60Hz, with reference to Figure 7 , when 120Hz refresh is performed, the difference between the anode initialization voltage Vrefn2 input to the display panel in the writing frame stage and the anode initialization voltage Vrefn2 input to the display panel in the holding frame stage is OffsetB1; when 120Hz refresh is performed, the difference between the anode initialization voltage Vrefn2 input to the display panel in the writing frame stage and the anode initialization voltage Vrefn2 input to the display panel in the holding frame stage is OffsetB2; OffsetB1 is not equal to OffsetB2.

[0091] The technical scheme provided by the embodiment of the present application can set different target anode initialization voltage difference values according to different refresh frequencies and different brightness levels of the display panel, and can further reduce the brightness difference value of the display panel in the writing frame stage and the holding frame stage, and realize fine adjustment and improvement of the static flicker problem of the display panel. It should be noted that for two display panels in different voltage grades, the target anode initialization voltage difference values corresponding to the two display panels can be different or the same under the same brightness level and the same refresh frequency, but at least one combination of brightness level and refresh frequency corresponds to different target anode initialization voltage difference values.

[0092] Figure 8 is a flowchart of another display panel driving method provided by the embodiment of the present application, referring to Figure 8 , the display panel driving method comprises:

[0093] S310, a configuration parameter mapping table matched with the voltage grade of the display panel is acquired; different voltage grades correspond to different configuration parameter mapping tables.

[0094] S320, the current brightness level and the current refresh frequency of the display panel are determined.

[0095] S330, the target anode initialization voltage difference value corresponding to the index composed of the current brightness level and the current refresh frequency is queried and acquired from the configuration parameter mapping table.

[0096] S340, the anode initialization voltage input to the display panel in the writing frame stage is determined according to the current brightness level of the display panel.

[0097] S350, the anode initialization voltage input to the anode of the light emitting device of the display panel in the holding frame stage is determined according to the anode initialization voltage difference value between the anode initialization voltage input to the anode of the light emitting device of the display panel in the writing frame stage and the target anode initialization voltage.

[0098] S360, the difference between the anode initialization voltage input to the anode of the light emitting device of the display panel in the writing frame stage and the anode initialization voltage input to the anode of the light emitting device of the display panel in the holding frame stage is controlled to meet the target anode initialization voltage difference value.

[0099] Specifically, before the difference between the initialization voltage input to the display panel in the write frame stage and the initialization voltage input to the display panel in the hold frame stage meets the target initialization voltage difference, the method further comprises: determining the initialization voltage input to the display panel in the write frame stage according to the current brightness level of the display panel; and determining the anode initialization voltage input to the display panel in the hold frame stage according to the difference between the anode initialization voltage input to the display panel in the write frame stage and the target initialization voltage difference. The anode initialization voltage is Vrefn2, and the target anode initialization voltage difference is OffsetB.

[0100] In the embodiment of the application, the anode initialization voltage Vrefn2 input to the display panel in the write frame stage is a known quantity, and the anode initialization voltage Vrefn2 input to the display panel in the hold frame stage is an unknown quantity. According to the anode initialization voltage Vrefn2 input to the display panel in the write frame stage and the corresponding target anode initialization voltage difference OffsetB obtained from the configuration parameter mapping table, the anode initialization voltage Vrefn2 input to the display panel in the hold frame stage at the current brightness level and the current refresh frequency can be determined.

[0101] In summary, the application provides a method for improving static flicker caused by cathode voltage ELVSS slice adjustment of a display panel. Different configuration parameter mapping tables (OffsetBLUT tables) are respectively assigned to ELVSS gears (voltage A gear, voltage B gear, voltage C gear, and so on; the number of voltage gears is greater than or equal to 2), which can further finely adjust and improve the static flicker of the display panel after ELVSS slice adjustment.

[0102] The embodiment of the application further provides a brightness compensation method of a display panel, which is used for determining the voltage gear of the display panel and the corresponding configuration parameter mapping table. Figure 9 FIG. 1 is a flowchart of a brightness compensation method of a display panel provided by an embodiment of the application, referring to Figure 9 The brightness compensation method of the display panel comprises the following steps.

[0103] S410, determining a target cathode voltage input to the cathode of the light emitting device of the display panel at a preset brightness level.

[0104] S420, determining the target cathode voltage and the target anode initialization voltage corresponding to each brightness level in the voltage gear to which the display panel belongs according to the difference between the target cathode voltage corresponding to the preset brightness level and the theoretical cathode voltage.

[0105] S430, inputting the target cathode voltage corresponding to each luminance level and the target anode initialization voltage to the light emitting device of the display panel in sequence to drive the display panel to display each luminance level in sequence; and adjusting the target anode initialization voltage input in the writing frame stage or in the holding frame stage until the luminance difference between the writing frame stage and the holding frame stage of the display panel is less than the preset luminance difference, to determine the difference between the target anode initialization voltage input to the anode of the light emitting device in the writing frame stage and the holding frame stage.

[0106] S440, determining the configuration parameter mapping table matched with the voltage gear of the display panel according to the difference between the target anode initialization voltage of each luminance level in the writing frame stage and the holding frame stage.

[0107] The luminance compensation method of the display panel provided by the embodiment of the application determines the configuration parameter mapping table matched with the voltage gear of the display panel, adjusts the difference between the anode initialization voltage input to the anode of the light emitting device of the display panel in the writing frame stage and the anode initialization voltage input to the anode of the light emitting device of the display panel in the holding frame stage according to the parameters recorded in the configuration parameter mapping table when driving the display panel, reduces the luminance difference between the writing frame stage and the holding frame stage of the display panel, improves the static flicker problem of the display panel, and improves the display effect of the display panel. The same configuration parameter mapping table is prevented from being shared by display panels of different voltage gears, which cannot meet the demand for improving the static flicker of all display panels.

[0108] Optionally, the preset luminance level can be the maximum luminance level of the display panel. The target cathode voltage input to the cathode of the light emitting device of the display panel under the preset luminance level in step S410 comprises:

[0109] S4110, inputting the theoretical cathode voltage corresponding to the maximum luminance level to the cathode of the light emitting device of the display panel and performing gamma adjustment to obtain the gamma voltage of each gray scale of the binding point; and the preset luminance level is the maximum luminance level.

[0110] S4120, inputting the gamma voltage of the preset gray scale to the pixel driving circuit of the display panel, and inputting the theoretical cathode voltage corresponding to the maximum luminance level and n candidate voltages to the cathode of the light emitting device of the display panel in sequence; n is an integer greater than or equal to 1.

[0111] S4130, respectively collecting the luminance values of the display panel when the theoretical cathode voltage and the n candidate voltages are input.

[0112] S4140, determining the target cathode voltage corresponding to the maximum luminance level of the display panel from the theoretical cathode voltage and the n candidate voltages according to the luminance values.

[0113] Specifically, the optimal cathode voltage ELVSS of different display panels can be different. Before gamma debugging, the gamma voltage of the maximum brightness level (nor1 Band) can be pre-debugged, and the specific process can include: inputting the theoretical cathode voltage corresponding to the maximum brightness level into the display panel and performing gamma adjustment to obtain the gamma voltage of each gray scale point; wherein the theoretical cathode voltage is input into the cathode of the light-emitting device in the display panel. After pre-debugging the gamma voltage of the maximum brightness level, n candidate voltages are selected downward from the theoretical cathode voltage according to a preset amplitude. The preset amplitude is greater than or equal to the minimum adjustment step of the power management integrated chip (PMIC). For example, n is 2, and two candidate voltages are selected. The theoretical cathode voltage is ELVSSA, the first candidate voltage is ELVSSB, and the second candidate voltage is ELVSSC. The theoretical cathode voltage ELVSSA is greater than the first candidate voltage ELVSSB, and the first candidate voltage ELVSSB is greater than the second candidate voltage ELVSSC. The gamma voltage of the preset gray scale is input into the display panel, and the theoretical cathode voltage ELVSSA, the first candidate voltage ELVSSB and the second candidate voltage ELVSSC are sequentially input into the cathode of the light-emitting device in the display panel. The preset gray scale can be 255 gray scales. The brightness values of the display panel when inputting the theoretical cathode voltage ELVSSA, the first candidate voltage ELVSSB and the second candidate voltage ELVSSC are collected respectively. After determining the theoretical cathode voltage ELVSSA and each candidate voltage (such as the first candidate voltage ELVSSB and the second candidate voltage ELVSSC), the target cathode voltage corresponding to the maximum brightness level of the display panel is determined from the theoretical cathode voltage ELVSSA and n candidate voltages according to the brightness values.

[0114] Optionally, step S4140 determines the target cathode voltage corresponding to the maximum brightness level of the display panel from the theoretical cathode voltage and n candidate voltages according to the brightness values, including:

[0115] Each adjacent two voltages in the theoretical cathode voltage and n candidate voltages and the corresponding brightness values form a calculation unit; a brightness slope is determined according to the ratio of the difference between the two brightness values in each calculation unit to the difference between the two voltages; a target calculation unit is determined according to a preset brightness slope condition and the brightness slope corresponding to each calculation unit; the absolute value of the smaller voltage of the two voltages in the target calculation unit is determined as the target cathode voltage corresponding to the maximum brightness level of the display panel.

[0116] Specifically, the preset brightness slope condition can be determined based on the relationship curves between cathode voltage and brightness of one or more sample panels. This can include: obtaining the cathode voltage-brightness relationship curves of one or more sample panels; determining the maximum brightness slope threshold based on the brightness slope of the boundary point (inflection point of brightness abrupt change) of the brightness saturation range of each cathode voltage-brightness relationship curve; and thus determining the preset brightness slope condition. For example, refer to... Figure 10 The cathode voltage-brightness relationship curves of three sample panels were obtained, namely cathode voltage-brightness relationship curve b1, cathode voltage-brightness relationship curve b2, and cathode voltage-brightness relationship curve b3. The brightness saturation interval a can be understood as the cathode voltage interval where the brightness changes with the cathode voltage at a relatively low rate. The cathode voltage values ​​corresponding to the boundary points of the brightness saturation interval a of different cathode voltage-brightness relationship curves are not much different, or even equal. Figure 10 The three cathode voltage-brightness relationship curves b3 shown have the same brightness saturation interval a. Based on the maximum value of the brightness slope among the boundary points (inflection points of brightness abrupt change) of the brightness saturation intervals of the three cathode voltage-brightness relationship curves, the maximum brightness slope threshold is determined, thereby determining the preset brightness slope condition; wherein the brightness slope can be determined based on the slope of the tangent line passing through the brightness abrupt change inflection point.

[0117] Among the theoretical cathode voltage ELVSSA, the first candidate voltage ELVSSB, and the second candidate voltage ELVSSC, the theoretical cathode voltage ELVSSA, the first candidate voltage ELVSSB, and their respective brightness values ​​can form a calculation unit, designated as the first calculation unit; the first candidate voltage ELVSSB, the second candidate voltage ELVSSC, and their respective brightness values ​​can form another calculation unit, designated as the second calculation unit. Two brightness slopes can then be obtained: the first brightness slope calculated using data from the first calculation unit, and the second brightness slope calculated using data from the second calculation unit. If both the first and second brightness slopes are less than or equal to the maximum brightness slope threshold, the voltage with the smallest absolute value among the theoretical cathode voltage ELVSSA, the first candidate voltage ELVSSB, and the second candidate voltage ELVSSC is selected as the target cathode voltage corresponding to the maximum brightness level of the display panel. Cathode voltages are typically negative, with the theoretical cathode voltage ELVSSA being greater than the first candidate voltage ELVSSB, and the first candidate voltage ELVSSB being greater than the second candidate voltage ELVSSC. The theoretical cathode voltage ELVSSA has the smallest absolute value, while the second candidate voltage ELVSSC has the largest absolute value. Therefore, the theoretical cathode voltage ELVSSA is selected as the target cathode voltage corresponding to the maximum brightness level of the display panel.

[0118] If only the second luminance slope is less than or equal to the maximum luminance slope threshold, the first candidate voltage ELVSSB is selected as the target cathode voltage corresponding to the maximum luminance level of the display panel; if both the first luminance slope and the second luminance slope are greater than the maximum luminance slope threshold, the second candidate voltage ELVSSC is selected as the target cathode voltage corresponding to the maximum luminance level of the display panel. Selecting the voltage with the smallest absolute value in the specification as the target cathode voltage corresponding to the maximum luminance level can reduce power consumption while ensuring that fluctuations in the cathode voltage do not cause large fluctuations in luminance, facilitating control of the luminance of the display panel.

[0119] The gear corresponding to ELVSSA is voltage gear A, the first candidate voltage corresponds to the gear of ELVSSB, which is voltage gear B, and the second candidate voltage corresponds to the gear of ELVSSC, which is voltage gear C. If the target cathode voltage is ELVSSA, it is determined that the voltage gear of the display panel is voltage gear A; if the target cathode voltage is ELVSSB, it is determined that the voltage gear of the display panel is voltage gear B; if the target cathode voltage is ELVSSC, it is determined that the voltage gear of the display panel is voltage gear C. After determining the voltage gear of the display panel, the target cathode voltage corresponding to each luminance level in the voltage gear of the display panel and the target anode initialization voltage are determined according to the difference between the target cathode voltage corresponding to the maximum luminance level and the theoretical cathode voltage, and then the configuration parameter mapping table matching the voltage gear is determined.

[0120] Optionally, in step S420, the target cathode voltage corresponding to each luminance level in the voltage gear of the display panel and the target anode initialization voltage are determined according to the difference between the target cathode voltage corresponding to the preset luminance level and the theoretical cathode voltage, comprising:

[0121] S4210, determining the voltage gear of the display panel according to the gear to which the target cathode voltage corresponding to the maximum luminance level of the display panel belongs; wherein the preset luminance level is the maximum luminance level of the display panel.

[0122] S4220, obtaining a voltage compensation value according to the difference between the theoretical cathode voltage corresponding to the maximum luminance level of the display panel and the target cathode voltage.

[0123] S4230, determining the target cathode voltage corresponding to each luminance level other than the maximum luminance level according to the theoretical cathode voltage corresponding to each luminance level other than the maximum luminance level and the voltage compensation value, respectively; and determining the target anode initialization voltage of each luminance level according to the theoretical anode initialization voltage corresponding to each luminance level of the display panel and the voltage compensation value, respectively.

[0124] Optionally, in step S430, when displaying each brightness level, the target anode initialization voltage input in the write frame stage or in the hold frame stage is adjusted until the difference between the brightness of the display panel in the write frame stage and the brightness in the hold frame stage is less than a preset brightness difference, and the difference between the target anode initialization voltage input to the anode of the light emitting device in the write frame stage and the hold frame stage is determined, including:

[0125] In each brightness level, the refresh frequency of the display panel is switched, and after each switch of the refresh frequency, the anode initialization voltage input to the anode of the light emitting device in the write frame stage is kept unchanged as the target anode initialization voltage, the target anode initialization voltage input to the anode of the light emitting device in the hold frame stage is adjusted until the difference between the brightness in the write frame stage and the brightness in the hold frame stage is less than a preset brightness difference, so as to determine the difference between the target anode initialization voltage in the write frame stage and the hold frame stage of the display panel at the current brightness level and the current refresh frequency.

[0126] In step S440, according to the difference between the target anode initialization voltage in the write frame stage and the hold frame stage of each brightness level, a configuration parameter mapping table matched with the voltage gear of the display panel is determined, including:

[0127] According to the difference between the target anode initialization voltage in the write frame stage and the hold frame stage corresponding to each refresh frequency of the display panel at each brightness level, a configuration parameter mapping table matched with the voltage gear of the display panel is determined.

[0128] Specifically, after the voltage gear of the display panel is determined, a voltage compensation value Offset is obtained according to the difference between the theoretical cathode voltage and the target cathode voltage corresponding to the maximum brightness level of the display panel; and the theoretical cathode voltage and the theoretical anode initialization voltage of all brightness levels are compensated according to the voltage compensation value Offset, so as to obtain the target cathode voltage and the target anode initialization voltage of each brightness level in the voltage gear. The obtained target anode initialization voltage is used for input to the anode of the light emitting device in the write frame stage. On this basis, gamma debugging is performed.

[0129] In the debugging process, for each refresh frequency of each brightness level (the corresponding target cathode voltage is input to the display panel, and the corresponding target anode initialization voltage is input to the anode of the light emitting device in the write frame stage), the anode initialization voltage input to the anode of the light emitting device in the hold frame stage is finely adjusted until the difference between the brightness of the display panel in the write frame stage and the brightness in the hold frame stage is less than a preset brightness difference, the difference between the anode initialization voltage input in the write frame stage and the anode initialization voltage input in the hold frame stage is calculated, and the target anode initialization voltage difference corresponding to the current brightness level and the current refresh frequency is determined.

[0130] The difference of the anode initialization voltage corresponding to each refresh frequency of each brightness level is recorded, so that the target anode initialization voltage difference corresponding to each refresh frequency of each brightness level is obtained; and the configuration parameter mapping table is obtained according to all the target anode initialization voltage differences. The configuration parameter mapping table can be stored in the driving device of the display panel. For example, if the gear of the display panel is determined to be voltage gear A, the obtained configuration parameter mapping table is the configuration parameter mapping table matched with voltage gear A.

[0131] The above steps are repeated to perform the voltage method on multiple display panels until the configuration parameter mapping tables of all voltage gears are obtained.

[0132] Optionally, the voltage method further comprises: obtaining configuration parameter mapping tables corresponding to at least two voltage gears; and determining the configuration parameter mapping table corresponding to at least one intermediate voltage gear based on an interpolation method and according to the configuration parameter mapping tables corresponding to the at least two voltage gears. Specifically, the number of configuration parameter mapping tables is variable with the number of voltage gears. When the number of voltage gears is too large, the configuration parameter mapping tables corresponding to at least two voltage gears can be obtained, the configuration parameter mapping table corresponding to at least one intermediate voltage gear is determined based on an interpolation method and according to the configuration parameter mapping tables corresponding to the at least two voltage gears, so that the process of obtaining the configuration parameter mapping tables of all voltage gears can be simplified. Setting more voltage gears and configuration parameter mapping tables matched with the voltage gears can further accurately improve the problem of static flashing of the display panel.

[0133] The embodiment of the present application further provides a driving device of a display panel, Figure 11 is a structural block diagram of the driving device of the display panel provided by the embodiment of the present application, referring to Figure 11 The driving device of the display panel comprises: a display parameter determination unit 10, configured to determine a current display parameter of the display panel; an obtaining unit 20, configured to obtain a configuration parameter mapping table matched with a voltage gear of the display panel, and obtain a target anode initialization voltage difference from the configuration parameter mapping table according to the current display parameter; wherein the configuration parameter mapping tables corresponding to different voltage gears are different; and a control unit 30, configured to control the difference between the anode initialization voltage input to the anode of the light emitting device of the display panel in a write frame stage and the anode initialization voltage input to the display panel in a hold frame stage to meet the target anode initialization voltage difference. Further, the driving device of the display panel further comprises a storage unit, configured to store the configuration parameter mapping table matched with the voltage gear of the display panel.

[0134] The driving device of the display panel provided by the embodiment of the present application can execute the driving method of the display panel provided by any embodiment of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0135] The embodiment of the present application further provides a display device, comprising a display panel and the driving device of the display panel according to any of the embodiments of the present application, wherein the driving device of the display panel stores a configuration parameter mapping table determined based on the brightness compensation method according to any of the embodiments of the present application. Therefore, the display device also has the beneficial effects described in any of the embodiments. In the embodiment, the display device can be a mobile phone, or any electronic product with a display function, including but not limited to the following categories: a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a smart bracelet, smart glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interactive terminal, and the like, and the display panel in the products is not specially limited in the embodiment of the present application.

[0136] It should be noted that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the appended claims.

Claims

1. A method for luminance compensation of a display panel, characterized in that, The method comprises the steps of: determining a target cathode voltage input to a cathode of a light emitting device of a display panel at a preset brightness level; determining target cathode voltages corresponding to each brightness level in a voltage range of the display panel and target anode initialization voltages according to a difference between the target cathode voltage corresponding to the preset brightness level and a theoretical cathode voltage; inputting the target cathode voltages corresponding to each brightness level and the target anode initialization voltages to the light emitting device of the display panel in sequence to drive the display panel to display each brightness level in sequence; and during the display of each brightness level, adjusting the target anode initialization voltage input in a write frame stage or a hold frame stage until a difference between the brightness of the display panel in the write frame stage and the brightness of the display panel in the hold frame stage is less than a preset brightness difference, and determining a difference between the target anode initialization voltage input to the anode of the light emitting device in the write frame stage and the target anode initialization voltage input to the anode of the light emitting device in the hold frame stage; determining a configuration parameter mapping table matched with the voltage range of the display panel according to the difference between the target anode initialization voltages of each brightness level in the write frame stage and the hold frame stage; The method comprises the steps of: inputting a theoretical cathode voltage corresponding to a maximum brightness level to the cathode of the light emitting device of the display panel and performing gamma adjustment to obtain gamma voltages of each gray scale of the binding point; the preset brightness level is the maximum brightness level; selecting n candidate voltages from the theoretical cathode voltage according to a preset amplitude; the preset amplitude is greater than or equal to a minimum adjustment step of a power management integrated chip; inputting the gamma voltage of a preset gray scale to a pixel driving circuit of the display panel, and inputting the theoretical cathode voltage corresponding to the maximum brightness level and the n candidate voltages to the cathode of the light emitting device of the display panel in sequence; n is an integer greater than or equal to 1; collecting brightness values of the display panel when the theoretical cathode voltage and the n candidate voltages are input respectively; determining a target cathode voltage corresponding to the maximum brightness level of the display panel from the theoretical cathode voltage and the n candidate voltages according to the brightness values; The method comprises the steps of: grouping each adjacent two voltages and corresponding brightness values in the theoretical cathode voltage and the n candidate voltages into a calculation unit; determining a brightness slope according to a ratio of a difference between two brightness values and a difference between two voltages in each calculation unit; determining a target calculation unit according to a preset brightness slope condition and a brightness slope corresponding to each calculation unit; determining a voltage with a smaller absolute value in the two voltages in the target calculation unit as the target cathode voltage corresponding to the maximum brightness level of the display panel. 2.The brightness compensation method of the display panel according to claim 1, characterized in that, The method comprises the steps of: determining the voltage gear of the display panel according to the gear to which the target cathode voltage corresponding to the maximum brightness level of the display panel belongs; wherein the preset brightness level is the maximum brightness level of the display panel; obtaining a voltage compensation value according to the difference between the target cathode voltage and the theoretical cathode voltage corresponding to the maximum brightness level of the display panel; determining the target cathode voltage corresponding to each brightness level other than the maximum brightness level according to the voltage compensation value and the theoretical cathode voltage corresponding to each brightness level other than the maximum brightness level of the display panel, respectively; and determining the target anode initialization voltage of each brightness level according to the voltage compensation value and the theoretical anode initialization voltage corresponding to each brightness level of the display panel, respectively.

3. The brightness compensation method of a display panel according to claim 2, wherein, The adjusting the target anode initialization voltage input in the write frame stage or in the holding frame stage until the difference between the brightness in the write frame stage and the brightness in the holding frame stage is less than a preset brightness difference, and determining the difference between the target anode initialization voltage input to the anode of the light emitting device in the write frame stage and the target anode initialization voltage input to the anode of the light emitting device in the holding frame stage, when displaying each brightness level, comprises: switching the refresh frequency of the display panel under each brightness level, and keeping the anode initialization voltage input to the anode of the light emitting device in the write frame stage unchanged as the target anode initialization voltage after each switching of the refresh frequency, adjusting the target anode initialization voltage input to the anode of the light emitting device in the holding frame stage until the difference between the brightness in the write frame stage and the brightness in the holding frame stage is less than a preset brightness difference, so as to determine the difference between the target anode initialization voltage in the write frame stage and the target anode initialization voltage in the holding frame stage corresponding to the current brightness level and the current refresh frequency of the display panel; determining the configuration parameter mapping table matched with the voltage gear of the display panel according to the difference between the target anode initialization voltage in the write frame stage and the target anode initialization voltage in the holding frame stage of each brightness level. determining the configuration parameter mapping table matched with the voltage gear of the display panel according to the difference between the target anode initialization voltage in the write frame stage and the target anode initialization voltage in the holding frame stage corresponding to each refresh frequency of the display panel under each brightness level.

4. The brightness compensation method of a display panel according to claim 1, wherein, Further comprising: obtaining the configuration parameter mapping table corresponding to at least two different voltage gears; determining the configuration parameter mapping table corresponding to at least one intermediate voltage gear based on the interpolation method and the configuration parameter mapping tables corresponding to at least two different voltage gears.

5. A driving method of a display panel, characterized by, comprising: obtaining the configuration parameter mapping table of the voltage of the display panel; the configuration parameter mapping table of the display panel is determined based on the brightness compensation method of the display panel in any one of claims 1-4; determining the current display parameter of the display panel; obtaining the target anode initialization voltage difference from the configuration parameter mapping table according to the current display parameter; controlling the difference between the anode initialization voltage input to the anode of the light emitting device of the display panel in the write frame stage and the anode initialization voltage input to the anode of the light emitting device of the display panel in the holding frame stage to satisfy the target anode initialization voltage difference.

6. The driving method of a display panel according to claim 5, wherein The current display parameter comprises the current brightness level and / or the current refresh frequency of the display panel. The target initialization voltage difference value is obtained from the configuration parameter mapping table according to the current display parameter, and the obtaining includes: The target initialization voltage difference value is obtained from the configuration parameter mapping table according to the current brightness level and / or the current refresh frequency.

7. The driving method of the display panel according to claim 6, wherein The number of brightness levels of the display panel is multiple, and the number of refresh frequencies of the display panel is multiple, the target anode initialization voltage difference value is obtained from the configuration parameter mapping table according to the current brightness level and / or the current refresh frequency, and the obtaining includes: The corresponding target anode initialization voltage difference value is queried and obtained from the configuration parameter mapping table according to an index composed of the current brightness level and the current refresh frequency, and the configuration parameter mapping table stores target anode initialization voltage difference values corresponding to different refresh frequencies under different brightness levels.

8. The driving method of the display panel according to claim 6, wherein The configuration parameter mapping table is stored in the driving device of the display panel.

9. The driving method of the display panel according to claim 6, wherein Before the difference between the anode initialization voltage input to the anode of the display panel light emitting device in the write frame stage and the anode initialization voltage input to the anode of the display panel light emitting device in the hold frame stage meets the target anode initialization voltage difference value, the method further includes: The anode initialization voltage input to the anode of the display panel light emitting device in the write frame stage is determined according to the current brightness level of the display panel; The anode initialization voltage input to the anode of the display panel light emitting device in the hold frame stage is determined according to the target initialization voltage difference value and the anode initialization voltage input to the anode of the display panel light emitting device in the write frame stage.

10. A driving apparatus of a display panel, applying the driving method of the display panel according to any one of claims 5 to 9, characterized by, The method includes: A display parameter determination unit is configured to determine a current display parameter of the display panel; An obtaining unit is configured to obtain a configuration parameter mapping table matched with a voltage gear of the display panel, and obtain a target anode initialization voltage difference value from the configuration parameter mapping table according to the current display parameter; different configuration parameter mapping tables correspond to different voltage gears; A control unit is configured to control the difference between the anode initialization voltage input to the anode of the display panel light emitting device in the write frame stage and the anode initialization voltage input to the anode of the display panel light emitting device in the hold frame stage to meet the target anode initialization voltage difference value.

11. A display device comprising: The display panel and the driving device of the display panel in claim 10 are included, and the driving device of the display panel stores a configuration parameter mapping table determined based on the brightness compensation method of the display panel in any one of claims 1 to 4.

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