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

Abstract

The invention discloses a driving method and device of a display panel, a brightness compensation method and a display device.The brightness compensation method of the display panel comprises the steps that according to a difference value between a target cathode voltage and a theoretical cathode voltage corresponding to a preset brightness level, the preset brightness level is calculated; determining a target cathode voltage and a target anode initialization voltage corresponding to each brightness level in the voltage gear to which the display panel belongs; when driving the display panel to display each brightness level, adjusting the target anode initialization voltage input in the write-in frame stage or the holding frame stage until the brightness difference value of the display panel in the write-in frame stage and the holding frame stage is smaller than a preset brightness difference value, so as to determine the difference value of the target anode initialization voltage corresponding to each brightness level; and determining a configuration parameter mapping table matched with the voltage gear of the display panel according to the difference value of the target anode initialization voltage of each brightness level in the writing frame stage and the holding frame stage. According to the technical scheme provided by the invention, the display effect of the display panel is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel driving method and device, a brightness compensation method and a display device. Background Art

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

[0003] Currently, the display effect of display panels is relatively poor and cannot meet the demand for high-quality display. Summary of the invention

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

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

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

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

[0008] The target cathode voltage and the target anode initialization voltage corresponding to each brightness level are sequentially input to the light-emitting device of the display panel to drive the display panel to sequentially display each brightness level; and when displaying each brightness level,

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

[0010] According to the difference between the target anode initialization voltages of each brightness level in the writing frame stage and the holding frame stage, a configuration parameter mapping table matching the voltage level of the display panel is determined.

[0011] Optionally, determining a target cathode voltage input to a cathode of a light emitting device of a display panel at a preset brightness level includes:

[0012] Inputting a 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 the gamma voltage of the grayscale of each binding point; the preset brightness level is the maximum brightness level;

[0013] Inputting a gamma voltage of a preset grayscale 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 the cathode of the light-emitting device 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 n candidate voltages are input;

[0015] A target cathode voltage corresponding to the maximum brightness level of the display panel is determined from the theoretical cathode voltage and n candidate voltages according to the brightness value.

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

[0017] The theoretical cathode voltage and each two adjacent voltages of the n candidate voltages and the corresponding brightness values ​​form a calculation unit;

[0018] Determine a brightness slope according to a ratio of a difference between two brightness values ​​and a difference between two voltages in each of the calculation units;

[0019] Determining a target computing unit according to a preset brightness slope condition and a brightness slope corresponding to each of the computing units;

[0020] The voltage with the smaller absolute value 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.

[0021] Optionally, determining the target cathode voltage and the target anode initialization voltage corresponding to each brightness level in the voltage range 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 includes:

[0022] Determining the voltage level of the display panel according to the level 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 a theoretical cathode voltage corresponding to a maximum brightness level of the display panel and a target cathode voltage;

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

[0025] According to the theoretical anode initialization voltage corresponding to each brightness level of the display panel and the voltage compensation value, the target anode initialization voltage for each brightness level is determined respectively.

[0026] Optionally, when displaying each brightness level, adjusting the target anode initialization voltage input in the writing frame stage or in the holding frame stage until the difference between the brightness of the display panel in the writing 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 writing frame stage and the holding frame stage, including:

[0027] At 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 writing frame stage is kept constant at the target anode initialization voltage, and 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 writing 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 voltages in the writing frame stage and the holding frame stage corresponding to the display panel at the current brightness level and the current refresh frequency;

[0028] The step of determining a configuration parameter mapping table matching the voltage level of the display panel according to the difference between the target anode initialization voltages of the writing frame stage and the holding frame stage at each brightness level includes:

[0029] According to the difference between the target anode initialization voltages of the write frame phase and the hold frame phase corresponding to each refresh frequency of the display panel at each brightness level, a configuration parameter mapping table matching the voltage level of the display panel is determined.

[0030] Optionally, the voltage slice adjustment method of the display panel also includes: obtaining configuration parameter mapping tables corresponding to at least two different voltage levels; based on the interpolation method, according to the configuration parameter mapping tables corresponding to at least two different voltage levels, determining a configuration parameter mapping table corresponding to at least one intermediate voltage slice adjustment level.

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

[0032] Acquire 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 described in any embodiment of the present invention;

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

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

[0035] The anode initialization voltage input to the anode of the display panel light-emitting device in the writing frame stage is controlled, and the difference of the anode initialization voltage input to the anode of the display panel light-emitting device in the holding frame stage is controlled to meet the target anode initialization voltage difference.

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

[0037] Acquire 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 display panel has multiple brightness levels and multiple refresh frequencies, and acquiring 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] According to the index composed of the current brightness level and the current refresh frequency, query and obtain the corresponding target anode initialization voltage difference from the configuration parameter mapping table; wherein the configuration parameter mapping table stores the target anode initialization voltage difference corresponding to different refresh frequencies at different brightness levels;

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

[0041] Preferably, before controlling the difference between the anode initialization voltage input to the anode of the display panel light-emitting device in the writing frame stage and the anode initialization voltage input to the anode of the display panel light-emitting device in the holding frame stage to meet the target anode initialization voltage difference, it also includes:

[0042] Determining, according to the current brightness level of the display panel, an anode initialization voltage input to the anode of the light-emitting device of the display panel during the frame writing phase;

[0043] 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 difference between the anode initialization voltage input to the anode of the display panel light emitting device in the write frame stage and the target initialization voltage.

[0044] According to another aspect of the present invention, there is provided a driving device for a display panel, comprising:

[0045] A display parameter determination unit, used to determine the current display parameters of the display panel; an acquisition unit, used to acquire a configuration parameter mapping table matching the 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 parameters; wherein different voltage levels correspond to different configuration parameter mapping tables; a control unit, used to control the difference between the anode initialization voltage input to the anode of the light-emitting device of the display panel during the writing frame stage and the anode initialization voltage input to the anode of the light-emitting device of the display panel during the maintaining frame stage to satisfy the target anode initialization voltage difference.

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

[0047] The technical solution provided by an embodiment of the present invention uses a configuration parameter mapping table that matches the voltage level of the display panel to adjust the difference between the initialization voltage input to the display panel in the writing frame stage and the anode initialization voltage input to the display panel in the holding frame stage, thereby reducing the brightness difference of the display panel in the writing frame stage and in the holding frame stage, and can improve the problem of static flicker of the display panel, thereby improving the display effect of the display panel.

[0048] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 is a flow chart of a method for driving a display panel provided by an embodiment of the present invention;

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

[0052] Figure 3 is a structural schematic diagram of a display device provided by an embodiment of the present invention;

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

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

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

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

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

[0058] Fig. 9 is a flow chart of a voltage adjustment method for a display panel provided by an embodiment of the present invention;

[0059] Fig.10 It is the cathode voltage-brightness relationship curve of three sample panels;

[0060] Fig.11 It is a structural block diagram of a driving device of a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0061] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0063] An embodiment of the present invention provides a method for driving a display panel. Figure 1 is a flow chart of a method for driving a display panel provided by an embodiment of the present invention, with reference to Figure 1 , the driving method of the display panel includes:

[0064] S110: Obtain a configuration parameter mapping table that matches the voltage level of the display panel.

[0065] The configuration parameter mapping table matching the voltage level of the display panel is determined based on the brightness compensation method of the display panel described in any embodiment below.

[0066] Specifically, due to differences in resolution, pixel circuit, signal transmission line resistance, etc. of different display panels, there are differences in the voltages adapted by different display panels, for example, there are differences in the size of the cathode voltage ELVSS, the initialization voltage, etc. According to the characteristics of the display panel, multiple voltage gears can be set, for example, voltage A gear, voltage B gear and voltage C gear are set. If the characteristics of the two display panels are not much different, or the characteristics of the two display panels are the same, the voltage gears of the two display panels are the same; if the characteristics of the two display panels are greatly different, the voltage gears of the two display panels are different, and the judgment conditions 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. Therefore, 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: Determine current display parameters of the display panel.

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

[0069] Specifically, the configuration parameter mapping table records at least the difference in the target anode initialization voltage of the display panel when writing the frame stage and maintaining the frame stage in different working scenarios, that is, the 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 the refresh rate and / or the brightness level of the display panel. In different working scenarios, at least one of the refresh 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, controlling the difference between the anode initialization voltage input to the anode of the display panel light-emitting device in the writing frame stage and the anode initialization voltage input to the anode of the display panel light-emitting device in the holding frame stage to meet the target anode initialization voltage difference.

[0071] Specifically, the time of one frame (one screen refresh cycle) includes a frame writing phase and a frame holding phase, wherein the frame holding phase can be understood as a vertical blanking phase. After a frame of display is finished, the display panel needs to prepare display data for the next frame of display. The vertical blanking phase duration can be used to prepare display data for the next frame of display. For example, Figure 2 is a schematic diagram of a frame length when the refresh rate of a display panel provided by an embodiment of the present invention is 120 Hz, with reference to Figure 2 When the display panel refreshes at the maximum refresh rate, for example, 120Hz, a refresh cycle (equivalent to a frame) includes a frame writing phase and a frame holding phase. The frame writing phase includes a data voltage vdata writing phase; and the frame holding phase does not include a data voltage vdata writing phase. In the frame writing phase, the data voltage vdata is sequentially written to the first pixel row to the last pixel row of the display panel.

[0072] After obtaining the target anode initialization voltage difference, the anode initialization voltage input to the anode of the light-emitting device of the display panel during the writing 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 during the holding frame stage is adjusted, so that the difference between the anode initialization voltage input to the display panel during the writing frame stage and the anode initialization voltage input to the display panel during the holding frame stage meets the target anode initialization voltage difference. In the case where the difference between the anode initialization voltage input to the anode of the light-emitting device of the display panel during the writing frame stage and the anode initialization voltage input to the anode of the light-emitting device of the display panel during the holding frame stage meets the target anode initialization voltage difference, the brightness difference between the display panel during the writing frame stage and the holding frame stage can be reduced, thereby improving the problem of static flicker of the display panel, and thus improving the display effect of the display panel.

[0073] The driving method of the display panel provided by the embodiment of the present invention uses a configuration parameter mapping table matching the voltage level of the display panel to adjust the difference between the initialization voltage input to the display panel in the frame writing stage and the initialization voltage input to the display panel in the frame holding stage, thereby reducing the brightness difference between the display panel in the frame writing stage and the frame holding stage, thereby improving the static flicker problem of the display panel and improving the display effect of the display panel. It prevents display panels belonging to different voltage levels from sharing the same configuration parameter mapping table, which results in the failure to meet the demand for improving static flicker of all display panels.

[0074] Based on the above embodiment, optionally, Figure 3 is a schematic diagram of a display device provided by an embodiment of the present invention, with reference to Figure 3The display device includes a display panel, and the display panel includes an array substrate and a light-emitting device layer arranged on the array substrate. The array substrate refers to a film structure that can provide a driving signal for the display device and play a role of buffering, protection or support, and includes a substrate and a pixel circuit layer arranged on the substrate. The pixel circuit layer includes a plurality of pixel circuit units arranged in an array, and also includes a plurality of data signal lines (D1 to Dr), a plurality of scanning signal lines (S1 to Sq) for controlling the writing of data voltages, and a plurality of light-emitting control signal lines (E1 to Eo). The display device also includes a data driver 300, a scanning driver 100, and a light-emitting control driver 200. The data driver 300 is respectively connected to a plurality of data signal lines (D1 to Dr), the scanning driver 100 is respectively connected to a plurality of scanning signal lines (S1 to Sq), and the light-emitting control pixel circuit 200 is respectively connected to a plurality of light-emitting control signal lines (E1 to Eo). The light-emitting device layer includes a plurality of light-emitting devices, and the pixel circuit unit and the correspondingly connected light-emitting devices 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 respectively connected to a scan signal line, a light-emitting control signal line, and a data signal line. The data signal line is configured to provide a data voltage vdata to the pixel circuit unit, the scan signal line is configured to provide a scan signal SP1 for controlling the 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, thereby realizing light-emitting control of the light-emitting device. Among them, 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, etc.

[0075] For example, Figure 4 is a circuit diagram of a pixel circuit provided by an embodiment of the present invention, Figure 3 The pixel circuit is an "8T1C" pixel circuit. Figure 4 The pixel circuit includes a first initialization transistor T7; a first electrode of the first initialization transistor T7 is electrically connected to the anode of the light-emitting device D; a second electrode of the first initialization transistor T7 is used to receive an anode initialization voltage Vrefn2; a gate of the first initialization transistor T7 is used to receive a first gate signal SP2; the first gate signal SP2 is used to control the conduction state of the first initialization transistor T7, and inputs the anode initialization voltage Vrefn2 to the anode of the light-emitting device D when it is turned on.

[0076] The pixel circuit also includes a driving transistor T1 and a second initialization transistor T8. The driving transistor T1 is used 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 (the second initialization transistor T8 is exemplarily drawn in the figure as being electrically connected to the first electrode of the driving transistor T1, and the first electrode of the driving transistor T1 is the source electrode S, and the second electrode is the drain electrode D) to transmit the first electrode initialization voltage VrefP to the first electrode of the driving transistor T1 to 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, and can share the same control signal with the first initialization transistor T7.

[0077] The pixel circuit further includes 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 can be connected to the scanning signal SP1. The data writing transistor T2 can be used to transmit the data voltage vdata to the first electrode of the driving transistor T1 during the data writing phase.

[0078] The pixel circuit may further include a storage capacitor Cst for storing a gate voltage of the driving transistor T1; and a third initialization transistor T4, which is electrically connected to the gate G of the driving transistor T1 through the compensation transistor T3 and is used to initialize the gate potential of the driving transistor T1. 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 may further include a first light emission control transistor T5 and a second light emission control transistor T6. The first light emission control transistor T5 is connected between a first power supply and a first electrode of the driving transistor T1, and the first power supply is used to input a voltage ELVDD to the first electrode of the driving transistor T1. The second light emission control transistor T6 is connected between a second electrode of the driving transistor T1 and an anode of the light emitting device D; the cathode of the light emitting device is connected to the second power supply, and is used to input a cathode voltage ELVSS to the cathode of the light emitting device. The gate of the first light emission control transistor T5 and the gate of the second light emission control transistor T6 receive the same light emission control signal EM.

[0080] Based on the above embodiment, optionally, the current display parameters include the current brightness level and / or the current refresh frequency of the display panel; then obtaining the target initialization voltage difference from the configuration parameter mapping table according to the current display parameters in step S130 includes: 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 display panel has multiple brightness levels and multiple refresh rates, the target initialization voltage difference may be obtained from the configuration parameter mapping table according to the current brightness level and the current refresh rate. Figure 5 is a flowchart of another display panel driving method provided by an embodiment of the present invention, referring to Figure 5 , the driving method of the display panel includes:

[0082] S210, obtaining a configuration parameter mapping table that matches the voltage level of the display panel; wherein different voltage levels correspond to different configuration parameter mapping tables.

[0083] S220: Determine a current brightness level and a current refresh rate of the display panel.

[0084] S230 , query and obtain the corresponding target anode initialization voltage difference 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 display panel light-emitting device in the writing frame stage and the anode initialization voltage input to the anode of the display panel light-emitting device in the holding frame stage to meet the target anode initialization voltage difference.

[0086] Specifically, from the minimum brightness of the display panel to the maximum brightness of the display panel, there can be m brightness segments, and the number of brightness levels of the display panel is m, where m is an integer greater than or equal to 2. Exemplarily, the brightness levels can be set to 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. At 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 with different voltage levels, the cathode voltage ELVSS input to the two display panels at the same brightness level is different.

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

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

[0089] Figure 6 is a comparison diagram of the frame length when the refresh frequency of a display panel provided by an embodiment of the present invention is 120 Hz and 60 Hz, with reference to Figure 6 When the screen refresh frequency of the display panel is the maximum refresh frequency, such as 120Hz, a screen refresh cycle (equivalent to one frame) includes a frame writing stage and a frame holding stage. The frame writing stage may include a data voltage vdata writing stage; and a frame holding stage without a data voltage vdata writing stage. When the screen refresh frequency of the display panel is less than the maximum refresh frequency, such as 60Hz, a screen refresh cycle (equivalent to one frame) may include a frame writing stage and a frame holding stage. The frame writing stage includes a data writing stage; and a frame holding stage without a data voltage vdata writing stage. The duration of the frame writing stage at 60Hz is equal to the duration of the frame writing stage at 120Hz; the duration of the frame holding stage at 60Hz is greater than the duration of the frame holding stage at 120Hz, and the duration of the frame holding stage at 60Hz is the sum of the duration of one frame at 120Hz and the duration of the frame holding stage at 120Hz.

[0090] For the display panel in voltage range A, refresh rates of 120 Hz and 60 Hz are respectively performed at the same brightness level. Figure 7 1 is a comparison diagram of the difference between the anode initialization voltage input in the writing frame stage and the holding frame stage when the refresh frequency of a display panel provided by an embodiment of the present invention is 120 Hz and 60 Hz, with reference to Figure 7 , when refreshing at 120Hz, the difference between the anode initialization voltage Vrefn2 input to the display panel during the frame writing stage and the anode initialization voltage Vrefn2 input to the display panel during the frame holding stage is controlled to be OffsetB1; when refreshing at 120Hz, the difference between the anode initialization voltage Vrefn2 input to the display panel during the frame writing stage and the anode initialization voltage Vrefn2 input to the display panel during the frame holding stage is controlled to be OffsetB2; OffsetB1 is not equal to OffsetB2.

[0091] The technical solution provided by the embodiment of the present invention sets different target anode initialization voltage differences according to the different refresh frequencies and brightness levels of the display panel, which can further reduce the brightness difference of the display panel in the frame writing stage and the frame holding stage, and achieve 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 ranges, at the same brightness level and the same refresh frequency, the target anode initialization voltage difference corresponding to the two display panels can be different or the same, but there is at least one combination of brightness level and refresh frequency corresponding to a different target anode initialization voltage difference.

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

[0093] S310, obtaining a configuration parameter mapping table that matches the voltage level of the display panel; wherein different voltage levels correspond to different configuration parameter mapping tables.

[0094] S320: Determine a current brightness level and a current refresh rate of the display panel.

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

[0096] S340 , determining an anode initialization voltage input to the display panel during a frame writing phase according to a current brightness level of the display panel.

[0097] S350, determining the anode initialization voltage input to the anode of the light-emitting device of the display panel in the hold frame stage according to 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 target anode initialization voltage.

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

[0099] Specifically, before the difference between the initialization voltage input to the display panel in the writing frame stage and the initialization voltage input to the display panel in the holding frame stage satisfies the target initialization voltage difference, the method further includes: determining the initialization voltage input to the display panel in the writing 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 holding frame stage according to the difference between the anode initialization voltage input to the display panel in the writing frame stage and the target initialization voltage. The anode initialization voltage is Vrefn2, and the target anode initialization voltage difference is OffsetB.

[0100] In the embodiment of the present invention, the anode initialization voltage Vrefn2 input to the display panel in the writing frame stage is a known quantity, and the anode initialization voltage Vrefn2 input to the display panel in the holding frame stage is an unknown quantity. According to the anode initialization voltage Vrefn2 input to the display panel in the writing 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 holding frame stage at the current brightness level and the current refresh frequency can be determined.

[0101] In summary, the present invention proposes a method for improving the static flicker caused by the cathode voltage ELVSS of the display panel after adjustment. Different configuration parameter mapping tables (OffsetBLUT table) are assigned to the ELVSS gears (voltage A gear, voltage B gear, voltage C gear...; the number of voltage gears ≥ 2), which can further finely adjust and improve the static flicker of the display panel after the ELVSS gear is adjusted.

[0102] An embodiment of the present invention further provides a brightness compensation method for a display panel, which is used to determine a voltage level of the display panel and a corresponding configuration parameter mapping table. Fig. 9 is a flow chart of a brightness compensation method for a display panel provided by an embodiment of the present invention, with reference to Fig. 9 , the brightness compensation method of the display panel includes:

[0103] S410, determining a target cathode voltage input to a cathode of a light emitting device of a 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 range 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, sequentially inputting a target cathode voltage and a target anode initialization voltage corresponding to each brightness level into the light-emitting device of the display panel to drive the display panel to sequentially display each brightness level; and when displaying each brightness level, adjusting the target anode initialization voltage input in the writing frame stage or in the holding frame stage until the difference between the brightness of the display panel in the writing 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 input to the anode of the light-emitting device in the writing frame stage and the holding frame stage.

[0106] S440 , determining a configuration parameter mapping table that matches the voltage level of the display panel according to the difference between the target anode initialization voltages of each brightness level in the writing frame stage and the holding frame stage.

[0107] The brightness compensation method of the display panel provided by the embodiment of the present invention determines a configuration parameter mapping table that matches the voltage level of the display panel, so as to adjust the difference between the anode initialization voltage input to the anode of the light-emitting device in the display panel during the writing frame stage and the anode initialization voltage input to the anode of the light-emitting device in the display panel during the holding frame stage according to the parameters recorded in the configuration parameter mapping table when driving the display panel, thereby reducing the brightness difference between the display panel during the writing frame stage and the holding frame stage, thereby improving the static flicker problem of the display panel and improving the display effect of the display panel. It prevents display panels belonging to different voltage levels from sharing the same configuration parameter mapping table, which results in the inability to meet the demand for improving static flicker of all display panels.

[0108] Optionally, the preset brightness level may be the maximum brightness level of the display panel. Determining the target cathode voltage input to the cathode of the light emitting device of the display panel at the preset brightness level in step S410 includes:

[0109] S4110, 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 a gamma voltage of a grayscale of each binding point; the preset brightness level is the maximum brightness level.

[0110] S4120, input a preset grayscale gamma voltage to the pixel driving circuit of the display panel, and sequentially input a theoretical cathode voltage corresponding to the maximum brightness level and n candidate voltages to the cathode of the light-emitting device of the display panel; n is an integer greater than or equal to 1.

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

[0112] S4140. Determine, according to the brightness value, a target cathode voltage corresponding to the maximum brightness level of the display panel from among the theoretical cathode voltage and n candidate voltages.

[0113] Specifically, the selection of the optimal cathode voltage ELVSS for different display panels may be different. Before gamma debugging, the gamma voltage of the maximum brightness level (nor1 Band) can be pre-debugged. The specific process may include: inputting the theoretical cathode voltage corresponding to the maximum brightness level to the display panel and performing gamma adjustment to obtain the gamma voltage of each binding point grayscale; wherein the theoretical cathode voltage is input to the cathode of the light-emitting device in the display panel. After pre-debugging the gamma voltage of the maximum brightness level, on the basis of the theoretical cathode voltage, n candidate voltages are selected downward according to the preset amplitude. Wherein 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. Input the gamma voltage of the preset grayscale to the display panel, and input the theoretical cathode voltage ELVSSA, the first candidate voltage ELVSSB and the second candidate voltage ELVSSC to the cathode of the light-emitting device in the display panel in sequence. The preset grayscale can be 255 grayscales. The brightness values ​​of the display panel when the theoretical cathode voltage ELVSSA, the first candidate voltage ELVSSB and the second candidate voltage ELVSSC are input are collected respectively. After determining the theoretical cathode voltage ELVSSA and each candidate voltage (for example, 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 the n candidate voltages according to each brightness value.

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

[0115] The theoretical cathode voltage and each two adjacent voltages among 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 voltage with the smaller absolute value 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 curve between cathode voltage and brightness of one or more sample panels. Specifically, it may include: obtaining the cathode voltage-brightness relationship curve of one or more sample panels, and determining the maximum brightness slope threshold according to the brightness slope of the boundary point (brightness mutation inflection point) of the brightness saturation interval of each cathode voltage-brightness relationship curve, thereby determining the preset brightness slope condition. For example, refer to Fig.10 , the cathode voltage-brightness relationship curves of the 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 lower amplitude. 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; Fig.10 The brightness saturation interval a of the three cathode voltage-brightness relationship curves b3 shown is the same. The maximum brightness slope threshold is determined according to the maximum value of the brightness slopes at the boundary points (inflection points of brightness mutation) of the brightness saturation intervals of the three cathode voltage-brightness relationship curves, thereby determining the preset brightness slope condition; wherein the brightness slope can be determined according to the slope of the tangent passing the brightness mutation 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, which is the first calculation unit; the first candidate voltage ELVSSB, the second candidate voltage ELVSSC and their respective brightness values ​​can form a calculation unit, which is the second calculation unit. Then two brightness slopes can be obtained, namely, the first brightness slope is calculated by the data in the first calculation unit, and the second brightness slope is calculated by the data in the second calculation unit. If the first brightness slope and the second brightness slope are both 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. The cathode voltage is usually a negative value, 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 absolute value of the theoretical cathode voltage ELVSSA is the smallest, and the absolute value of the second candidate voltage ELVSSC is the largest. 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 brightness slope is less than or equal to the maximum brightness slope threshold, the first candidate voltage ELVSSB is selected as the target cathode voltage corresponding to the maximum brightness level of the display panel; if both the first brightness slope and the second brightness slope are greater than the maximum brightness slope threshold, the second candidate voltage ELVSSC is selected as the target cathode voltage corresponding to the maximum brightness 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 brightness level can reduce power consumption while ensuring that the fluctuation of the cathode voltage will not cause large brightness fluctuations, which is convenient for controlling the brightness of the display panel.

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

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

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

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

[0123] S4230. Determine the target cathode voltage corresponding to each brightness level other than the maximum brightness level of the display panel based on the theoretical cathode voltage and voltage compensation value corresponding to each brightness level other than the maximum brightness level of the display panel; and determine the target anode initialization voltage for each brightness level based on the theoretical anode initialization voltage and voltage compensation value corresponding to each brightness level of the display panel.

[0124] Optionally, in step S430, when displaying each brightness level, adjusting the target anode initialization voltage input in the writing frame stage or in the holding frame stage until the difference between the brightness of the display panel in the writing 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 writing frame stage and the holding frame stage, including:

[0125] At 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 at the target anode initialization voltage, and 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 the preset brightness difference, so as to determine the difference between the target anode initialization voltages in the write frame stage and the hold frame stage corresponding to the current brightness level and the current refresh frequency of the display panel.

[0126] In step S440, a configuration parameter mapping table matching the voltage level of the display panel is determined according to the difference between the target anode initialization voltages of each brightness level in the writing frame stage and the holding frame stage, including:

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

[0128] Specifically, after the voltage level of the display panel is determined, the 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 level. The obtained target anode initialization voltage is used to input to the anode of the light-emitting device in the frame writing stage. Gamma debugging is performed on this basis.

[0129] During 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 in the writing frame stage), the anode initialization voltage input to the anode of the light-emitting device in the holding frame stage is carefully adjusted until the difference between the brightness of the display panel in the writing frame stage and the brightness in the holding frame stage is less than the preset brightness difference. The difference between the anode initialization voltage input in the writing frame stage and the anode initialization voltage input in the holding frame stage is calculated, and determined as the target anode initialization voltage difference corresponding to the current brightness level and the current refresh frequency.

[0130] The difference of the anode initialization voltage corresponding to each refresh frequency of each brightness level is recorded, so as to obtain the target anode initialization voltage difference corresponding to each refresh frequency of each brightness level; 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 the voltage gear A, the obtained configuration parameter mapping table is the configuration parameter mapping table matching the voltage gear A.

[0131] Repeat the above steps to perform the voltage method on multiple display panels until a configuration parameter mapping table of all voltage levels is obtained.

[0132] Optionally, the voltage method also includes: obtaining configuration parameter mapping tables corresponding to at least two voltage gears; based on the interpolation method, determining the configuration parameter mapping table corresponding to at least one intermediate voltage gear according to the configuration parameter mapping tables corresponding to at least two voltage gears. Specifically, the number of configuration parameter mapping tables varies with the number of voltage gears. When the number of voltage gears is too large, configuration parameter mapping tables corresponding to at least two voltage gears can be obtained; based on the interpolation method, determining the configuration parameter mapping table corresponding to at least one intermediate voltage gear according to the configuration parameter mapping tables corresponding to at least two voltage gears, thereby simplifying the process of obtaining configuration parameter mapping tables for all voltage gears. Setting more voltage gears and configuration parameter mapping tables adapted to the voltage gears can further accurately improve the problem of static flickering of the display panel.

[0133] The embodiment of the present invention further provides a driving device for a display panel. Fig.11 is a structural block diagram of a driving device for a display panel provided by an embodiment of the present invention, with reference to Fig.11 The driving device of the display panel includes: a display parameter determination unit 10, which is used to determine the current display parameters of the display panel; an acquisition unit 20, which is used to acquire a configuration parameter mapping table matching the 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 parameters; wherein different voltage levels correspond to different configuration parameter mapping tables; a control unit 30, which is used to control 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 display panel in the holding frame stage to meet the target anode initialization voltage difference. Further, the driving device of the display panel also includes a storage unit, which is used to store a configuration parameter mapping table matching the voltage level of the display panel.

[0134] The driving device of the display panel provided in the embodiment of the present invention can execute the driving method of the ring display panel provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0135] An embodiment of the present invention further provides a display device, including a display panel and a driving device for the display panel described in any embodiment of the present invention, wherein the driving device of the display panel stores a configuration parameter mapping table determined based on the brightness compensation method described in any embodiment of the present invention. Therefore, the display device also has the beneficial effects described in any of the above embodiments. In this 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: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals and other products. The embodiment of the present invention does not specifically limit this.

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

Claims

1. A brightness compensation method for a display panel, characterized in that: include: determining a target cathode voltage input to a cathode of a light emitting device of a display panel at a preset brightness level; Determine the target cathode voltage and the target anode initialization voltage corresponding to each brightness level in the voltage range of the display panel according to the difference between the target cathode voltage corresponding to the preset brightness level and the theoretical cathode voltage; The target cathode voltage and the target anode initialization voltage corresponding to each brightness level are sequentially input to the light-emitting device of the display panel to drive the display panel to sequentially display each brightness level; and when displaying each brightness level, Adjusting a target anode initialization voltage input in a writing frame stage or in a holding frame stage until a difference between the brightness of the display panel in the writing frame stage and the brightness in the holding frame stage is less than a preset brightness difference, and determining a difference between a target anode initialization voltage input to the anode of the light-emitting device in the writing frame stage and the holding frame stage; According to the difference between the target anode initialization voltages of each brightness level in the writing frame stage and the holding frame stage, a configuration parameter mapping table matching the voltage level of the display panel is determined.

2. The brightness compensation method of a display panel according to claim 1, characterized in that: The step of determining a target cathode voltage input to a cathode of a light emitting device of a display panel at a preset brightness level comprises: Inputting a 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 the gamma voltage of the grayscale of each binding point; the preset brightness level is the maximum brightness level; Inputting a gamma voltage of a preset grayscale 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 the cathode of the light-emitting device of the display panel; n is an integer greater than or equal to 1; respectively collecting brightness values ​​of the display panel when the theoretical cathode voltage and n candidate voltages are input; A target cathode voltage corresponding to the maximum brightness level of the display panel is determined from the theoretical cathode voltage and n candidate voltages according to the brightness value.

3. The brightness compensation method of a display panel according to claim 2, characterized in that: The step of determining a target cathode voltage corresponding to the maximum brightness level of the display panel from among the theoretical cathode voltage and n candidate voltages according to the brightness value includes: The theoretical cathode voltage and each two adjacent voltages of the n candidate voltages and the corresponding brightness values ​​form a calculation unit; Determine a brightness slope according to a ratio of a difference between two brightness values ​​and a difference between two voltages in each of the calculation units; Determining a target computing unit according to a preset brightness slope condition and a brightness slope corresponding to each of the computing units; The voltage with the smaller absolute value 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.

4. The brightness compensation method of a display panel according to claim 1, characterized in that: The step of determining the target cathode voltage and the target anode initialization voltage corresponding to each brightness level in the voltage range of the display panel according to the difference between the target cathode voltage corresponding to the preset brightness level and the theoretical cathode voltage includes: Determining the voltage level of the display panel according to the level 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 a difference between a theoretical cathode voltage corresponding to a maximum brightness level of the display panel and a target cathode voltage; Determining target cathode voltages corresponding to each brightness level other than the maximum brightness level according to the theoretical cathode voltages corresponding to each brightness level other than the maximum brightness level of the display panel and the voltage compensation value; and According to the theoretical anode initialization voltage corresponding to each brightness level of the display panel and the voltage compensation value, the target anode initialization voltage for each brightness level is determined respectively.

5. The brightness compensation method of a display panel according to claim 4, characterized in that: When displaying each brightness level, adjusting the target anode initialization voltage input in the writing frame stage or in the holding frame stage until the difference between the brightness of the display panel in the writing 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 writing frame stage and the holding frame stage, including: At 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 writing frame stage is kept constant at the target anode initialization voltage, and 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 writing 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 voltages in the writing frame stage and the holding frame stage corresponding to the display panel at the current brightness level and the current refresh frequency; The step of determining a configuration parameter mapping table matching the voltage level of the display panel according to the difference between the target anode initialization voltages of the writing frame stage and the holding frame stage at each brightness level includes: According to the difference between the target anode initialization voltages of the write frame phase and the hold frame phase corresponding to each refresh frequency of the display panel at each brightness level, a configuration parameter mapping table matching the voltage level of the display panel is determined.

6. The brightness compensation method of a display panel according to claim 1, characterized in that: Also includes: Obtain a configuration parameter mapping table corresponding to at least two different voltage levels; Based on the interpolation method, a configuration parameter mapping table corresponding to at least one intermediate voltage slice adjustment level is determined according to the configuration parameter mapping tables corresponding to at least two different voltage levels.

7. A method for driving a display panel, characterized in that: include: Acquire 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 according to any one of claims 1 to 6; Determining current display parameters of the display panel; Acquire a target anode initialization voltage difference from the configuration parameter mapping table according to the current display parameter; The anode initialization voltage input to the anode of the display panel light-emitting device in the writing frame stage is controlled, and the difference of the anode initialization voltage input to the anode of the display panel light-emitting device in the holding frame stage is controlled to meet the target anode initialization voltage difference.

8. The method for driving a display panel according to claim 7, wherein: The current display parameters include the current brightness level and / or the current refresh rate of the display panel; The acquiring the target initialization voltage difference from the configuration parameter mapping table according to the current display parameter includes: Acquire a target initialization voltage difference from the configuration parameter mapping table according to the current brightness level and / or the current refresh frequency; Preferably, the display panel has a plurality of brightness levels and a plurality of refresh frequencies, and acquiring 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: According to the index composed of the current brightness level and the current refresh frequency, the corresponding target anode initialization voltage difference is queried from the configuration parameter mapping table and obtained; wherein the configuration parameter mapping table stores the target anode initialization voltage difference corresponding to different refresh frequencies at different brightness levels; Preferably, the configuration parameter mapping table is stored in a driving device of the display panel; Preferably, before controlling the difference between the anode initialization voltage input to the anode of the display panel light-emitting device in the writing frame stage and the anode initialization voltage input to the anode of the display panel light-emitting device in the holding frame stage to meet the target anode initialization voltage difference, it also includes: Determining, according to the current brightness level of the display panel, an anode initialization voltage input to the anode of the light-emitting device of the display panel during the frame writing phase; 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 difference between the anode initialization voltage input to the anode of the display panel light emitting device in the write frame stage and the target initialization voltage.

9. A driving device for a display panel, characterized in that: include: a display parameter determination unit, configured to determine a current display parameter of the display panel; an acquisition unit, configured to acquire a configuration parameter mapping table matching the 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; wherein different voltage levels correspond to different configuration parameter mapping tables; A control unit is used to control the difference between the anode initialization voltage input to the anode of the display panel light-emitting device in the writing frame stage and the anode initialization voltage input to the anode of the display panel light-emitting device in the holding frame stage to meet the target anode initialization voltage difference.

10. A display device, characterized in that: The invention comprises a display panel and a driving device for the display panel as claimed in claim 9, wherein the driving device for the display panel stores a configuration parameter mapping table determined based on the brightness compensation method for the display panel as claimed in any one of claims 1 to 6.

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