Compensation method and compensation device of display panel and display device

Abstract

The invention discloses a compensation method and a compensation device of a display panel and a display device. The compensation method of the display panel comprises the following steps: determining a display brightness level currently adopted by the display panel; determining a compensation voltage corresponding to the currently adopted display brightness level; wherein the compensation voltages corresponding to at least part of the display brightness levels are different; according to the compensation voltage, performing brightness compensation on the display panel during frame keeping; wherein the current picture of the display panel comprises a write-in frame and at least one holding frame, the write-in frame comprises a data write-in stage and a light emitting stage, and the holding frame comprises a light emitting stage. The display effect of the display panel can be improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a compensation method, a compensation device and a display device for a display panel. Background Art

[0002] With the development of OLED (Organic Light-Emitting Diode) display technology, people have higher and higher requirements on OLED display panels. However, the existing OLED display panels have the problem of poor display effect. Summary of the invention

[0003] The present invention provides a compensation method, a compensation device and a display device for a display panel, so as to improve the display effect of the display panel.

[0004] According to one aspect of the present invention, a compensation method for a display panel is provided, comprising:

[0005] Determine the display brightness level currently used by the display panel;

[0006] Determining a compensation voltage corresponding to the currently used display brightness level; wherein at least some of the display brightness levels correspond to different compensation voltages;

[0007] According to the compensation voltage, brightness compensation is performed on the display panel when the frame is maintained; wherein the current picture of the display panel includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light emitting stage, and the maintaining frame includes a light emitting stage.

[0008] Optionally, determining the compensation voltage corresponding to the currently used display brightness level includes:

[0009] Determining the compensation voltage corresponding to the currently used display brightness level according to the currently used display brightness level and the compensation voltages corresponding to at least two different preset display brightness levels determined in advance;

[0010] Optionally, the compensation voltage corresponding to the preset display brightness level is determined according to compensation voltages corresponding to a plurality of different gray scales at the preset display brightness level.

[0011] Optionally, before determining the compensation voltage corresponding to the currently used display brightness level, the method further includes:

[0012] Acquire an image to be displayed on the display panel, and determine an image equivalent grayscale of the image to be displayed;

[0013] Determining the compensation voltage corresponding to the currently used display brightness level includes:

[0014] The compensation voltage of the display panel is determined according to the image equivalent grayscale and the currently used display brightness level; wherein, at the same display brightness level, the compensation voltages corresponding to at least some grayscales are different.

[0015] Optionally, at the same display brightness level, different grayscales correspond to different compensation voltages, or at the same display brightness level, different grayscale ranges correspond to different compensation voltages, and all grayscales within the same grayscale range correspond to the same compensation voltages.

[0016] Optionally, determining a compensation voltage of a display panel according to the image equivalent grayscale and the currently used display brightness level includes:

[0017] Determine the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and a compensation model corresponding to a predetermined preset display brightness level; wherein the compensation model is a corresponding relationship model between grayscale and compensation voltage;

[0018] Optionally, the compensation voltage of the display panel is determined based on the image equivalent grayscale and the currently used display brightness level, and compensation models corresponding to at least two different preset display brightness levels; wherein the compensation models corresponding to at least some of the preset display brightness levels are different.

[0019] Optionally, the compensation model includes a first formula;

[0020] The first formula is: Y = aX 2 +bX+c; wherein Y is the compensation voltage, X is the grayscale, a is the secondary compensation coefficient, b is the primary compensation coefficient, and c is the first compensation adjustment value;

[0021] When the compensation model includes the first formula, at least one of a, b and c corresponding to at least part of the display brightness levels is different.

[0022] Optionally, the compensation model includes a second formula;

[0023] The second formula is: Y=dX+e; wherein d is the compensation coefficient, and e is the second compensation adjustment value;

[0024] When the compensation model includes the second formula, at least one of d and e corresponding to at least part of the display brightness levels is different.

[0025] Optionally, the compensation model used in the same display brightness level range is the same, and the compensation models used in different display brightness level ranges are different.

[0026] Optionally, the compensation model adopted in the same display brightness level range is a compensation module corresponding to the maximum display brightness level in the display brightness level range.

[0027] Optionally, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and compensation models corresponding to at least two different preset display brightness levels, includes:

[0028] If the at least two preset display brightness levels do not include the currently used display brightness level, determining at least two first compensation values ​​corresponding to the image equivalent grayscale according to the compensation models corresponding to the at least two preset display brightness levels, and determining the compensation voltage of the display panel according to the at least two first compensation values;

[0029] Optionally, the compensation model corresponding to the preset display brightness level is determined according to compensation voltages corresponding to a plurality of different display grayscales at the preset display brightness level.

[0030] Optionally, determining a compensation voltage of a display panel according to the image equivalent grayscale and the currently used display brightness level includes:

[0031] The compensation voltage of the display panel is determined according to the image equivalent grayscale, the currently used display brightness level, and the compensation voltage at a preset display grayscale at a predetermined preset display brightness level.

[0032] Optionally, the number of preset display brightness levels is at least two, and the number of preset display grayscales at each preset display brightness level is at least two;

[0033] Optionally, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and a compensation voltage at a preset display grayscale at a predetermined preset display brightness level, includes:

[0034] The compensation voltage of the display panel is determined by interpolation according to the image equivalent grayscale and the currently used display brightness level, and the compensation voltages at at least two different preset display grayscales at at least two different preset display brightness levels.

[0035] Optionally, determining an image equivalent grayscale of the image to be displayed includes:

[0036] Determining a pixel equivalent grayscale of each pixel unit; wherein the display panel includes a plurality of pixel units, and each of the pixel units includes at least three sub-pixels of different luminous colors;

[0037] Determining an image equivalent grayscale of the image to be displayed according to the pixel equivalent grayscale of each pixel unit;

[0038] Optionally, determining the image equivalent grayscale of the image to be displayed according to the pixel equivalent grayscale of each pixel unit includes:

[0039] The image equivalent grayscale of the image to be displayed is determined according to the number of equivalent grayscales of each pixel, the equivalent grayscales of the pixels, and the total number of equivalent grayscales of the pixels of the display panel.

[0040] Optionally, performing brightness compensation on the display panel while maintaining the frame according to the compensation voltage includes:

[0041] The compensation voltage is input to the source or drain of the driving transistor of each sub-pixel in the display panel during the holding frame; wherein the display panel includes a plurality of sub-pixels, each sub-pixel includes a light-emitting unit and a pixel driving circuit, and the pixel driving circuit includes a driving transistor.

[0042] According to another aspect of the present invention, there is provided a compensation device for a display panel, comprising:

[0043] A display brightness level determination module, used to determine the display brightness level currently used by the display panel;

[0044] A compensation voltage determination module, used to determine the compensation voltage corresponding to the currently used display brightness level; wherein at least some display brightness levels correspond to different compensation voltages;

[0045] A compensation module is used to perform brightness compensation on the display panel when maintaining a frame according to the compensation voltage; wherein the current picture of the display panel includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light-emitting stage, and the maintaining frame includes a light-emitting stage.

[0046] According to another aspect of the present invention, a display device is provided, comprising a display panel and the compensation device for the display panel according to any embodiment of the present invention.

[0047] The display panel compensation method of the embodiment of the present invention first determines the display brightness level currently used by the display panel, and then determines the compensation voltage corresponding to the display brightness level currently used; wherein, the compensation voltages corresponding to at least some of the display brightness levels are different, and then the display panel is brightness compensated while maintaining the frame according to the compensation voltage. By performing brightness compensation on the display panel according to the compensation voltage while maintaining the frame, the flicker problem can be effectively improved. Since the brightness of the same gray scale is different at different display brightness levels, by setting the compensation voltages corresponding to at least some of the display brightness levels to be different, compensation can be performed in a targeted manner for different display brightness levels, and the flicker problem during low-frequency display at different display brightness levels can be targetedly improved, 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 compensation method for a display panel provided by an embodiment of the present invention;

[0051] Figure 2 is a flow chart of another display panel compensation method provided by an embodiment of the present invention;

[0052] Figure 3 It is a graph of compensation voltage at each gray scale;

[0053] Figure 4 is a flow chart of another display panel compensation method provided by an embodiment of the present invention;

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

[0055] Figure 6 It is a graph of grayscale and compensation voltage;

[0056] Figure 7 is a flow chart of another display panel compensation method provided by an embodiment of the present invention;

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

[0058] Fig. 9 is a schematic diagram of a compensation device for a display panel provided by an embodiment of the present invention;

[0059] Fig.10 is a schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0060] 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.

[0061] 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.

[0062] As mentioned in the background technology, the existing display panel has poor display effect. The inventor found through research that the reason for this problem is that the display panel will use different image refresh frequencies for display in different application scenarios. For example, in application scenarios such as games and videos that display dynamic images, the display panel is in high-frequency mode. In this mode, the display panel uses a higher image refresh frequency for display to ensure the smoothness of the displayed image; in application scenarios such as e-books that display static images, the display panel is in low-frequency mode. In this mode, the display panel uses a lower image refresh frequency to reduce the power consumption of the display panel. However, when the display panel is in low-frequency mode, there is a flickering phenomenon, which affects the display effect of the display panel.

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

[0064] S110: Determine the display brightness level currently used by the display panel.

[0065] The display brightness level is DBV. The display panel can include multiple display brightness levels. The minimum display brightness of all display brightness levels is 0, and the maximum display brightness of different display brightness levels is different. Each display brightness level can display 0-(2 n-1) Gray scale, n is an integer greater than or equal to 8. For example, each display brightness level can display gray scales of 0-255. Different display brightness levels have different brightness under the same gray scale.

[0066] S120, determining the compensation voltage corresponding to the currently used display brightness level; wherein, at least some of the display brightness levels correspond to different compensation voltages.

[0067] The compensation voltage is used to compensate for flicker of the display panel. The compensation voltages corresponding to at least some display brightness levels are different, which may mean that the compensation voltages corresponding to all display brightness levels are different, or the compensation voltages corresponding to some display brightness levels are the same, and the compensation voltages corresponding to some display brightness levels are different.

[0068] Specifically, since the brightness of the same grayscale is different at different display brightness levels, the brightness changes of the display panel at different display brightness levels are different, and different compensation voltages are required. By setting the compensation voltages corresponding to at least some display brightness levels to be different, targeted compensation can be performed for different display brightness levels, thereby improving the flicker problem during low-frequency display at different display brightness levels.

[0069] S130. Perform brightness compensation on the display panel while maintaining a frame according to the compensation voltage; wherein the current picture of the display panel includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light emitting stage, and the maintaining frame includes a light emitting stage.

[0070] Specifically, when the refresh frequency of the display panel is less than the preset frequency, a frame of the display screen generally includes a write frame and a plurality of hold frames, and each write frame and each hold frame have the same duration. The data voltage is written to the driving transistor during the write phase of the write frame. Exemplarily, the preset frequency may be less than or equal to 30 Hz. During the light-emitting phase of the write frame, the driving transistor outputs a driving current to drive the light-emitting diode to emit light. The data voltage is not written in the hold frame. During the light-emitting phase of the hold frame, the driving transistor generates a driving current according to the data voltage stored in the storage unit to drive the light-emitting diode to emit light. Since the storage unit may have leakage, the data voltage stored in the storage unit will gradually decay when the frame is held. The decay of the data voltage stored in the storage unit will cause the driving current generated by the driving transistor to change, thereby causing the brightness of the light-emitting diode to change, resulting in a flicker problem. In this embodiment, the brightness of the display panel is compensated according to the compensation voltage during the hold frame, which can effectively improve the flicker problem and enhance the display effect of the display panel.

[0071] In addition, according to the compensation voltage, the display panel is compensated for brightness when the frame is maintained. The compensation voltage can be input to the source or drain of the driving transistor during the maintenance phase, and the compensation voltage is generally not written to the gate of the driving transistor to compensate for the brightness deviation caused by leakage of the storage unit.

[0072] The display panel compensation method of the embodiment of the present invention first determines the display brightness level currently used by the display panel, and then determines the compensation voltage corresponding to the display brightness level currently used; wherein, the compensation voltages corresponding to at least some of the display brightness levels are different, and then the display panel is brightness compensated while maintaining the frame according to the compensation voltage. By performing brightness compensation on the display panel according to the compensation voltage while maintaining the frame, the flicker problem can be effectively improved. Since the brightness of the same gray scale is different at different display brightness levels, by setting the compensation voltages corresponding to at least some of the display brightness levels to be different, compensation can be performed in a targeted manner for different display brightness levels, and the flicker problem during low-frequency display at different display brightness levels can be targetedly improved, thereby improving the display effect of the display panel.

[0073] Figure 2 is a flow chart of another display panel compensation method provided by an embodiment of the present invention, referring to Figure 1 and Figure 2 The embodiment of the present invention optimizes the compensation method of the display panel based on the above embodiment. Specifically, S120, determining the compensation voltage corresponding to the currently used display brightness level, is optimized to S121, determining the compensation voltage corresponding to the currently used display brightness level according to the currently used display brightness level and the compensation voltages corresponding to at least two different preset display brightness levels determined in advance. Figure 2 , the compensation method of the optimized display panel includes the following steps:

[0074] S110: Determine the display brightness level currently used by the display panel.

[0075] S121. Determine a compensation voltage corresponding to the currently used display brightness level according to the currently used display brightness level and compensation voltages corresponding to at least two different preset display brightness levels determined in advance.

[0076] Specifically, when debugging the display panel, the compensation voltage corresponding to each preset display brightness level can be debugged and determined respectively, and the compensation voltage can be stored in the display panel. When the display panel displays the picture, after determining the display brightness level currently used, the display brightness level corresponding to the currently used display brightness level can be searched in the preset display brightness levels, and the compensation voltage corresponding to the currently used display brightness level can be determined according to the compensation voltage corresponding to the corresponding display brightness level. Exemplarily, if there is a preset display brightness level that is the same as the currently used display brightness level among at least two preset display brightness levels, the same preset display brightness level is determined as the compensation voltage corresponding to the currently used display brightness level; if there is no preset display brightness level that is the same as the currently used display brightness level among at least two preset display brightness levels, the compensation voltage corresponding to the currently used display brightness level is determined by interpolation according to the compensation voltages corresponding to the two preset display brightness levels closest to the currently used display brightness level.

[0077] S130, performing brightness compensation on the display panel in a holding frame according to the compensation voltage, wherein the display panel includes a plurality of driving cycles, each driving cycle includes a writing frame and at least one holding frame, the writing frame includes a data writing phase and a light emitting phase, and the holding frame includes a light emitting phase.

[0078] This embodiment determines the compensation voltage corresponding to the currently used display brightness level based on the previously used display brightness level and the compensation voltages corresponding to at least two different preset display brightness levels. The display panel only needs to store the compensation voltages corresponding to at least two different preset display brightness levels. The data storage is small, and there is no need to occupy too much storage space of the display panel, thereby reducing the cost of the display panel.

[0079] On the basis of the above-mentioned embodiment, the compensation voltage corresponding to the preset display brightness level is determined according to the compensation voltages corresponding to multiple different grayscales under the preset display brightness level. Specifically, different preset display brightness levels can be debugged in advance, and multiple grayscale binding points are set under each preset display brightness level, and the display panel is driven to display each grayscale binding point. In the process of displaying each grayscale binding point, different compensation voltages are input to the display panel in sequence, and the flicker degree of the display panel is tested under each compensation voltage. The compensation voltage corresponding to the minimum flicker degree is determined as the compensation voltage corresponding to the grayscale binding point, and the compensation voltage of the preset display brightness level is determined according to the compensation voltages corresponding to multiple different grayscale binding points under the same preset display brightness level.

[0080] Exemplarily, under a preset display brightness level A, flicker data under different compensation voltages are obtained at grayscales of 8, 16, 32, 64, 128 and 255. Table 1 is the flicker data under different compensation voltages. Referring to Table 1, Table 1 shows the flicker degree data under different compensation voltages at grayscales of 8, 16, 32, 128 and 255. W255 represents the flicker degree of a white screen at grayscale 255, W128 represents the flicker degree of a white screen at grayscale 128, W32 represents the flicker degree of a white screen at grayscale 32, W16 represents the flicker degree of a white screen at grayscale 16, and W8 represents the flicker degree of a white screen at grayscale 8. The smaller the value of the flicker degree, the smaller the flicker degree, and the compensation voltage corresponding to the minimum flicker degree is determined as the compensation voltage of the corresponding grayscale. Referring to Table 1, the compensation voltage corresponding to 255 grayscale is 6.2V, the compensation voltage corresponding to 128 grayscale is 5.6V, the compensation voltage corresponding to 32 grayscale is 4.4V, the compensation voltage corresponding to 16 grayscale is 3.4V, and the compensation voltage corresponding to 8 grayscale is 3.2V. The compensation voltage under the preset display brightness level A can be determined according to the compensation voltages under 8, 16, 32, 128 and 255 grayscales. Exemplarily, Figure 3 It is a graph of compensation voltage at each gray scale. Figure 3 The compensation voltage of 64 gray scales can be the median value of the compensation voltage of each gray scale. The compensation voltage of 64 gray scales can also be directly used as the compensation voltage of the preset display brightness level A.

[0081] Table 1

[0082]

[0083] The embodiment of the present invention determines the compensation voltage corresponding to the preset display brightness level according to the compensation voltages corresponding to multiple different grayscales under the preset display brightness level, so that the compensation voltage under each preset display brightness level can have a good compensation effect on each grayscale, so that the compensation voltage corresponding to the currently used display brightness level determined according to the compensation voltages corresponding to at least two different preset display brightness levels can have a good compensation effect on the display panel, thereby improving the display effect of the display panel.

[0084] Figure 4 is a flow chart of another display panel compensation method provided by an embodiment of the present invention, referring to Figure 1 and Figure 4, the embodiment of the present invention optimizes the compensation method of the display panel based on the above embodiment. Specifically, before S120, determining the compensation voltage corresponding to the currently used display brightness level, the following is added: S150 obtains the image to be displayed on the display panel and determines the image equivalent grayscale of the image to be displayed. And S120, determining the compensation voltage corresponding to the currently used display brightness level, is refined into S122, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level; wherein, at least some of the grayscales under the same display brightness level correspond to different compensation voltages. Reference Figure 5 , the compensation method of the optimized display panel includes the following steps:

[0085] S110: Determine the display brightness level currently used by the display panel.

[0086] S150: Acquire an image to be displayed on the display panel, and determine an image equivalent grayscale of the image to be displayed.

[0087] The image to be displayed is the image to be displayed by the display panel, and the image display grayscale reflects the overall grayscale level of the image to be displayed. The image equivalent grayscale can be determined according to the average of all display grayscales in the image to be displayed, or according to the largest display grayscale in the image to be displayed.

[0088] S122, determining a compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level; wherein, at the same display brightness level, the compensation voltages corresponding to at least some grayscales are different.

[0089] Specifically, since different grayscales correspond to different display brightnesses at the same display brightness level, by setting the compensation voltages corresponding to at least some grayscales at the same display brightness level to be different, the compensation voltage can compensate for each grayscale in a targeted manner, thereby better improving flicker and enhancing display effects.

[0090] Exemplarily, determining the compensation voltage of the display panel based on the image equivalent grayscale and the currently used display brightness level can be by predetermining the corresponding relationship between the grayscale and the compensation voltage at each display brightness level, and substituting the image equivalent grayscale into the corresponding relationship to determine the compensation voltage; or it can be by predetermining at least two preset display brightness levels, and the compensation voltages corresponding to at least two grayscales at each preset display brightness level, and determining the compensation voltage based on the currently used display brightness level and the image equivalent grayscale, and the compensation voltages corresponding to at least two grayscales at the predetermined at least two preset display brightness levels.

[0091] S130. Perform brightness compensation on the display panel while maintaining a frame according to the compensation voltage; wherein the display panel includes a plurality of driving cycles, each driving cycle includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light emitting stage, and the maintaining frame includes a light emitting stage.

[0092] The compensation method of the embodiment of the present invention obtains the image to be displayed of the display panel, and determines the image equivalent grayscale of the image to be displayed. According to the image equivalent grayscale and the currently used display brightness level, the compensation voltage of the display panel is determined. Each grayscale can be compensated in a targeted manner, thereby better improving flicker and enhancing display effects.

[0093] Based on the above embodiments, optionally, the compensation voltages corresponding to different grayscales at the same display brightness level are different, or, at the same display brightness level, the compensation voltages corresponding to different grayscale ranges are different, and the compensation voltages corresponding to all grayscales within the same grayscale range are the same.

[0094] Specifically, by setting different compensation voltages corresponding to different grayscales at the same display brightness level, each grayscale can be better compensated and flicker can be better improved. By setting different compensation voltages corresponding to different grayscale ranges at the same display brightness level, and the compensation voltages corresponding to all grayscales in the same grayscale range are the same, it can ensure targeted compensation for different grayscale ranges, reduce the amount of data calculation, and improve the compensation speed.

[0095] On the basis of the above embodiment, optionally, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level includes:

[0096] The compensation voltage of the display panel is determined according to the image equivalent grayscale, the currently used display brightness level, and a compensation model corresponding to a predetermined preset display brightness level, wherein the compensation model is a corresponding relationship model between grayscale and compensation voltage.

[0097] Specifically, two or more compensation models corresponding to different preset display brightnesses can be predetermined. When the currently used display brightness is the same as the preset display brightness level, the compensation model corresponding to the preset display brightness level and the image equivalent grayscale are directly used to determine the compensation voltage of the display panel.

[0098] Figure 5 is a flow chart of another display panel compensation method provided by an embodiment of the present invention, referring to Figure 4 and Figure 5The embodiment of the present invention optimizes the compensation method of the display panel based on the above embodiment, specifically, S122, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, is optimized to: S1221, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and the compensation model corresponding to at least two different preset display brightness levels determined in advance. Reference Figure 6 , the compensation method of the optimized display panel includes the following steps:

[0099] S110: Determine the display brightness level currently used by the display panel.

[0100] S150: Acquire an image to be displayed on the display panel, and determine an image equivalent grayscale of the image to be displayed.

[0101] S1221, determining a compensation voltage of a display panel according to the image equivalent grayscale and the currently used display brightness level, and compensation models corresponding to at least two different preset display brightness levels, wherein at least some of the preset display brightness levels correspond to different compensation models.

[0102] Optionally, the compensation model includes a first formula;

[0103] The first formula is: Y = aX 2 +bX+c; wherein Y is the compensation voltage, X is the grayscale, a is the secondary compensation coefficient, b is the primary compensation coefficient, and c is the first compensation adjustment value;

[0104] When the compensation model includes the first formula, at least one of a, b and c corresponding to at least part of the display brightness levels is different.

[0105] Optionally, the compensation model includes a second formula, which is: Y=dX+e; wherein d is the compensation coefficient, and e is the second compensation adjustment value;

[0106] When the compensation model includes the second formula, at least one of d and e corresponding to at least part of the display brightness levels is different.

[0107] Specifically, at each display brightness level, compensation voltages corresponding to multiple different display grayscales at each preset display brightness level can be debugged; and a compensation model corresponding to the preset display brightness level can be determined according to the compensation voltages corresponding to multiple different display grayscales at the same preset display brightness level.

[0108] According to the image equivalent grayscale and the currently used display brightness level, as well as the compensation models corresponding to at least two different preset display brightness levels, determining the compensation voltage of the display panel can be: searching among the at least two preset display brightness levels whether there is a preset display brightness level that is the same as the currently used display brightness level; if so, determining the compensation model corresponding to the same preset display brightness level as the compensation model corresponding to the currently used display brightness level, and calculating the compensation voltage according to the compensation model and the image equivalent grayscale; if not, searching for the preset display brightness level that is closest to the currently used display brightness level, substituting the image equivalent grayscale into the compensation model corresponding to the closest preset display brightness level to obtain a preliminary compensation voltage, and determining the final compensation voltage according to the preliminary compensation voltage.

[0109] S130. Perform brightness compensation on the display panel while maintaining a frame according to the compensation voltage; wherein the display panel includes a plurality of driving cycles, each driving cycle includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light emitting stage, and the maintaining frame includes a light emitting stage.

[0110] The embodiment of the present invention determines the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and the compensation model corresponding to at least two different preset display brightness levels determined in advance. The compensation voltage is determined according to the compensation model, so that the determined compensation voltage is more accurate, and the flicker can be better compensated, thereby improving the compensation effect of the display panel. In addition, the compensation model includes the first formula or the second formula; the first formula is: Y = aX 2 +bX+c; the second formula is: Y=dX+e. The first formula and the second formula are simple in form, which can reduce the difficulty of calculation and improve the compensation speed.

[0111] Optionally, the compensation model used in the same display brightness level range is the same, and the compensation models used in different display brightness level ranges are different.

[0112] By setting the compensation models used in the same display brightness level range to be the same and different display brightness level ranges to be different, the compensation difficulty can be reduced and the compensation speed can be increased.

[0113] On the basis of the above embodiment, optionally, the compensation model adopted in the same display brightness level range is a compensation module corresponding to the maximum display brightness level in the display brightness level range.

[0114] Exemplarily, 3-5 DBVs of different sizes in the display brightness level curve can be selected, taking 5 as an example; the compensation models of the 5 DBVs are determined respectively. The compensation voltage is calculated using the compensation model of the 5th DBV for the DBV between the 5th and 4th DBVs, the compensation voltage is calculated using the compensation model of the 4th DBV for the DBV between the 4th and 3rd DBVs, the compensation voltage is calculated using the compensation model of the 3rd DBV for the DBV between the 3rd and 2nd DBVs, the compensation voltage is calculated using the compensation model of the 2nd DBV for the DBV between the 2nd and 1st DBVs, and the compensation voltage is calculated using the compensation model of the 1st DBV for the DBVs below the 1st DBV.

[0115] On the basis of the above embodiment, optionally, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and compensation models corresponding to at least two different preset display brightness levels, includes:

[0116] If the at least two preset display brightness levels do not include the currently used display brightness level, at least two first compensation values ​​corresponding to the image equivalent grayscale are determined according to the compensation model corresponding to the at least two preset display brightness levels, and the compensation voltage of the display panel is determined according to the at least two first compensation values.

[0117] Specifically, two preset display brightness levels that are closest to the currently used display brightness level can be found among at least two preset display brightness levels, the image equivalent grayscale can be substituted into the compensation model of the two closest preset display brightness levels, two first compensation values ​​can be calculated, and the compensation voltage can be determined by interpolation based on the two first compensation values.

[0118] On the basis of the above embodiment, optionally, the compensation model corresponding to the preset display brightness level is determined according to the compensation voltages corresponding to a plurality of different display grayscales under the preset display brightness level.

[0119] Specifically, referring to Table 1, the compensation voltages corresponding to the multiple grayscale binding points at each preset display brightness level can be pre-determined, and the compensation model can be determined by interpolating and fitting the multiple grayscale binding points and compensation voltages at the same preset display brightness level. Figure 6 It is a relationship diagram between grayscale and compensation voltage, refer to Figure 6 , Figure 6 The solid line in the middle is the actual compensation voltage curve determined based on the compensation voltages under multiple grayscales actually measured. Figure 6 The two dotted lines in the figure are two compensation models fitted according to the actual compensation voltage curve.

[0120] On the basis of the above embodiments, optionally, the compensation voltage of the display panel is determined according to the image equivalent grayscale and the currently used display brightness level, including: determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and the compensation voltage at a preset display grayscale at a predetermined preset display brightness level.

[0121] Specifically, before the display panel leaves the factory, two or more different preset display brightness levels and two or more different preset display grayscale compensation voltages at each preset display brightness level can be determined through debugging, and the debugged compensation voltages can be stored in the display panel. When the display panel displays the image to be displayed, the compensation voltage is determined according to the stored compensation voltages.

[0122] When the currently used display brightness level is the same as the preset display brightness level, and the image equivalent grayscale is the same as the preset display grayscale, the compensation voltage at the preset display grayscale at the preset display brightness level can be directly used as the compensation voltage corresponding to the image equivalent grayscale at the currently used display brightness level.

[0123] Figure 7 is a flow chart of another display panel compensation method provided by an embodiment of the present invention, referring to Figure 4 and Figure 7 Optionally, the number of preset display brightness levels is at least two, and the number of preset display grayscales at each preset display brightness level is at least two, that is, the compensation method for the display panel includes the following steps:

[0124] S110: Determine the display brightness level currently used by the display panel.

[0125] S150: Acquire an image to be displayed on the display panel, and determine an image equivalent grayscale of the image to be displayed.

[0126] S1222. Determine a compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and compensation voltages at at least two different preset display grayscales at at least two different preset display brightness levels.

[0127] Specifically, the compensation voltage of the display panel is determined according to the image equivalent grayscale and the currently adopted display brightness level, and the compensation voltages at at least two different preset display grayscales under the predetermined at least two different preset display brightness levels. It can be: if there is a preset display brightness level that is the same as the currently adopted display brightness level among the at least two preset display brightness levels, and there is a preset display grayscale that is the same as the image equivalent grayscale among the same preset display brightness levels, then the compensation voltage corresponding to the preset display grayscale is determined as the compensation voltage of the display panel. If there is no preset display brightness level that is the same as the currently adopted display brightness level among the at least two preset brightness levels, or there is a preset display brightness level that is the same as the currently adopted display brightness level, and there is no preset display grayscale that is the same as the image equivalent grayscale among the same preset display brightness levels, then the compensation voltage of the display panel can be determined by interpolation.

[0128] S130. Perform brightness compensation on the display panel while maintaining a frame according to the compensation voltage; wherein the display panel includes a plurality of driving cycles, each driving cycle includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light emitting stage, and the maintaining frame includes a light emitting stage.

[0129] The embodiment of the present invention determines the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, as well as the compensation voltages at at least two different preset display brightness levels and at least two different preset display grayscales that are predetermined. This can compensate for different display brightness levels and different display grayscales in a targeted manner, thereby better improving flicker and enhancing display effects.

[0130] On the basis of the above embodiment, optionally, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and the compensation voltages at at least two different preset display grayscales at at least two different preset display brightness levels, comprises:

[0131] The compensation voltage of the display panel is determined by interpolation according to the image equivalent grayscale and the currently used display brightness level, and the compensation voltages at at least two different preset display grayscales at at least two different preset display brightness levels.

[0132] Specifically, the compensation voltage of the display panel may be determined by linear interpolation or nonlinear interpolation.

[0133] Figure 8 is a flow chart of another display panel compensation method provided by an embodiment of the present invention, referring to Figure 4 and Figure 8The embodiment of the present invention optimizes the compensation method of the display panel based on the above embodiment. S150 obtains the image to be displayed of the display panel, and determines that the image equivalent grayscale of the image to be displayed is optimized as follows: S151, determining the pixel equivalent grayscale of each pixel unit; wherein the display panel includes a plurality of pixel units, and each of the pixel units includes at least three sub-pixels of different luminous colors; S152, determining the image equivalent grayscale of the image to be displayed according to the pixel equivalent grayscale of each pixel unit. Reference Figure 8 , the optimized display panel compensation method includes the following steps:

[0134] S110: Determine the display brightness level currently used by the display panel.

[0135] S151, determining a pixel equivalent grayscale of each pixel unit; wherein the display panel includes a plurality of pixel units, and each of the pixel units includes at least three sub-pixels of different luminous colors.

[0136] The at least three sub-pixels of different luminous colors may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The pixel equivalent grayscale of each pixel unit is determined according to the display grayscales of the at least three sub-pixels of different luminous colors. Specifically, the white screen grayscale obtained by mixing the display grayscales of the at least three sub-pixels of different luminous colors can be calculated according to a white balance formula, and the white screen grayscale is determined as the pixel equivalent grayscale.

[0137] S152: Determine an image equivalent grayscale of the image to be displayed according to the pixel equivalent grayscale of each pixel unit.

[0138] Specifically, the mean of the pixel equivalent grayscale of all pixel units can be calculated, the pixel equivalent grayscale of all pixel units can be added, the sum obtained after addition is divided by the number of pixel equivalent grayscales to obtain the mean of the pixel equivalent grayscale, and the mean of the pixel equivalent grayscale is determined as the image equivalent grayscale. The weighted average of the pixel equivalent grayscale of all pixel units can also be calculated, and the weighted average is determined as the image equivalent grayscale. Exemplarily, different pixel equivalent grayscales can be assigned different weight values, each pixel equivalent grayscale can be multiplied by the corresponding weight value to obtain a weighted grayscale, and all weighted grayscales can be added to obtain a weighted average.

[0139] S122, determining a compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level; wherein, at the same display brightness level, the compensation voltages corresponding to at least some grayscales are different.

[0140] S130. Perform brightness compensation on the display panel while maintaining a frame according to the compensation voltage; wherein the display panel includes a plurality of driving cycles, each driving cycle includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light emitting stage, and the maintaining frame includes a light emitting stage.

[0141] The embodiment of the present invention first determines the pixel equivalent grayscale of each pixel unit, and then determines the image equivalent grayscale of the image to be displayed according to the pixel equivalent grayscale of each pixel unit, so that the determined image equivalent grayscale can reflect the overall grayscale level of the image to be displayed, so that the compensation voltage determined according to the image equivalent grayscale and the currently used display brightness level is more accurate, and can better compensate for the flicker and improve the display effect.

[0142] On the basis of the above embodiment, optionally, determining the image equivalent grayscale of the image to be displayed according to the pixel equivalent grayscale of each pixel unit includes:

[0143] The image equivalent grayscale of the image to be displayed is determined according to the number of equivalent grayscales of each pixel, the equivalent grayscales of the pixels, and the total number of equivalent grayscales of the pixels of the display panel.

[0144] Specifically, the pixel equivalent grayscales of all pixel units may be added together, and the result of the addition may be divided by the total number of pixel equivalent grayscales to obtain the image equivalent grayscale.

[0145] On the basis of the above embodiment, optionally, performing brightness compensation on the display panel while maintaining the frame according to the compensation voltage includes:

[0146] The compensation voltage is input to the source or drain of the driving transistor of each sub-pixel in the display panel during the holding frame; wherein the display panel includes a plurality of sub-pixels, each sub-pixel includes a light-emitting unit and a pixel driving circuit, and the pixel driving circuit includes a driving transistor.

[0147] Specifically, each sub-pixel includes a light-emitting unit and a pixel driving circuit connected to the light-emitting unit. The pixel driving circuit includes a driving transistor, which is used to output a driving current to the light-emitting unit to drive the light-emitting unit to emit light. The compensation voltage can be input to the source or drain of the driving transistor through the existing wiring in the display panel and the existing switching transistor in the pixel driving circuit. The compensation voltage can also be input to the source or drain of the driving transistor through a newly added transistor and a signal line.

[0148] The embodiment of the present invention further provides a compensation device for a display panel. The compensation device for a display panel can be integrated into a DDIC or a TCON IC and a SD-IC of the display panel. Fig. 9 is a schematic diagram of a compensation device for a display panel provided by an embodiment of the present invention, with reference to Fig. 9 , the compensation device of the display panel includes:

[0149] A display brightness level determination module 210, used to determine the display brightness level currently used by the display panel;

[0150] A compensation voltage determination module 220, configured to determine the compensation voltage corresponding to the currently used display brightness level; wherein at least some display brightness levels correspond to different compensation voltages;

[0151] The compensation module 230 is used to perform brightness compensation on the display panel when maintaining the frame according to the compensation voltage; wherein the current picture of the display panel includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light-emitting stage, and the maintaining frame includes a light-emitting stage.

[0152] Optionally, the compensation voltage determination module 220 is specifically used for:

[0153] The compensation voltage corresponding to the currently used display brightness level is determined according to the currently used display brightness level and the compensation voltages corresponding to at least two different preset display brightness levels.

[0154] Optionally, the compensation voltage corresponding to the preset display brightness level is determined according to compensation voltages corresponding to a plurality of different gray scales at the preset display brightness level.

[0155] Optionally, the compensation device further comprises:

[0156] An equivalent grayscale determination module, used for obtaining an image to be displayed on the display panel and determining an image equivalent grayscale of the image to be displayed before determining the compensation voltage corresponding to the currently adopted display brightness level;

[0157] The compensation voltage determination module 220 is specifically used for:

[0158] The compensation voltage of the display panel is determined according to the image equivalent grayscale and the currently used display brightness level; wherein, at the same display brightness level, the compensation voltages corresponding to at least some grayscales are different.

[0159] Optionally, at the same display brightness level, different grayscales correspond to different compensation voltages, or at the same display brightness level, different grayscale ranges correspond to different compensation voltages, and all grayscales within the same grayscale range correspond to the same compensation voltages.

[0160] The compensation voltage determination module 220 is specifically used for:

[0161] The compensation voltage of the display panel is determined according to the image equivalent grayscale and the currently used display brightness level, and a compensation model corresponding to a preset display brightness level; wherein the compensation model is a corresponding relationship model between grayscale and compensation voltage.

[0162] Optionally, the compensation voltage of the display panel is determined based on the image equivalent grayscale and the currently used display brightness level, and compensation models corresponding to at least two different preset display brightness levels; wherein the compensation models corresponding to at least some of the preset display brightness levels are different.

[0163] Optionally, the compensation model includes a first formula

[0164] The first formula is: Y = aX 2 +bX+c; wherein Y is the compensation voltage, X is the grayscale, a is the secondary compensation coefficient, b is the primary compensation coefficient, and c is the first compensation adjustment value;

[0165] When the compensation model includes the first formula, at least one of a, b and c corresponding to at least part of the display brightness levels is different.

[0166] Optionally, the compensation model includes a second formula; the second formula is: Y=dX+e; wherein d is the compensation coefficient, and e is the second compensation adjustment value;

[0167] When the compensation model includes the second formula, at least one of d and e corresponding to at least part of the display brightness levels is different.

[0168] Optionally, the compensation model used in the same display brightness level range is the same, and the compensation models used in different display brightness level ranges are different.

[0169] Optionally, the compensation model adopted in the same display brightness level range is a compensation module corresponding to the maximum display brightness level in the display brightness level range.

[0170] Optionally, the compensation voltage determination module 220 is specifically used for:

[0171] If the at least two preset display brightness levels do not include the currently used display brightness level, at least two first compensation values ​​corresponding to the image equivalent grayscale are determined according to the compensation model corresponding to the at least two preset display brightness levels, and the compensation voltage of the display panel is determined according to the at least two first compensation values.

[0172] Optionally, the compensation model corresponding to the preset display brightness level is determined according to the compensation voltages corresponding to a plurality of different display grayscales under the preset display brightness level. Optionally, the compensation voltage determination module 220 is specifically used for:

[0173] Determining a compensation voltage of the display panel according to the image equivalent grayscale, the currently used display brightness level, and a compensation voltage at a preset display grayscale at a predetermined preset display brightness level;

[0174] Optionally, the number of preset display brightness levels is at least two, and the number of preset display grayscales at each preset display brightness level is at least two.

[0175] Optionally, the compensation voltage determination module 220 is specifically used to interpolate and determine the compensation voltage of the display panel based on the image equivalent grayscale and the currently used display brightness level, as well as the compensation voltages at at least two different preset display grayscales at at least two different preset display brightness levels.

[0176] Optionally, the equivalent grayscale determination module includes:

[0177] A pixel equivalent grayscale determination unit, used to determine the pixel equivalent grayscale of each pixel unit; wherein the display panel includes a plurality of pixel units, each of the pixel units includes at least three sub-pixels of different luminous colors;

[0178] The image equivalent grayscale determining unit is used to determine the image equivalent grayscale of the image to be displayed according to the pixel equivalent grayscale of each pixel unit.

[0179] Optionally, the image equivalent grayscale determining unit is specifically used for:

[0180] The image equivalent grayscale of the image to be displayed is determined according to the number of equivalent grayscales of each pixel, the equivalent grayscales of the pixels, and the total number of equivalent grayscales of the pixels of the display panel.

[0181] Optionally, the compensation module 230 is specifically used for:

[0182] The compensation voltage is input to the source or drain of the driving transistor of each sub-pixel in the display panel during the holding frame; wherein the display panel includes a plurality of sub-pixels, each sub-pixel includes a light-emitting unit and a pixel driving circuit, and the pixel driving circuit includes a driving transistor.

[0183] An embodiment of the present invention further provides a display device, Fig.10 is a schematic diagram of a display device provided by an embodiment of the present invention, with reference to Fig.10 The display device 100 includes a display panel 300 and a compensation device 200 for a display panel according to any embodiment of the present invention.

[0184] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0185] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compensation method for a display panel, characterized in that: include: Determine the display brightness level currently used by the display panel; Determining a compensation voltage corresponding to the currently used display brightness level; wherein at least some of the display brightness levels correspond to different compensation voltages; According to the compensation voltage, brightness compensation is performed on the display panel when the frame is maintained; wherein the current picture of the display panel includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light emitting stage, and the maintaining frame includes a light emitting stage.

2. The display panel compensation method according to claim 1, characterized in that: Determining the compensation voltage corresponding to the currently used display brightness level includes: Determining the compensation voltage corresponding to the currently used display brightness level according to the currently used display brightness level and the compensation voltages corresponding to at least two different preset display brightness levels determined in advance; Preferably, the compensation voltage corresponding to the preset display brightness level is determined according to compensation voltages corresponding to a plurality of different grayscales at the preset display brightness level.

3. The display panel compensation method according to claim 1, characterized in that: Before determining the compensation voltage corresponding to the currently used display brightness level, the method further includes: Acquire an image to be displayed on the display panel, and determine an image equivalent grayscale of the image to be displayed; Determining the compensation voltage corresponding to the currently used display brightness level includes: The compensation voltage of the display panel is determined according to the image equivalent grayscale and the currently used display brightness level; wherein, at the same display brightness level, the compensation voltages corresponding to at least some grayscales are different.

4. The display panel compensation method according to claim 3, characterized in that: Different grayscales have different compensation voltages corresponding to them at the same display brightness level, or different grayscale ranges have different compensation voltages corresponding to them at the same display brightness level, and all grayscales within the same grayscale range have the same compensation voltages corresponding to them.

5. The display panel compensation method according to claim 3, characterized in that: Determining a compensation voltage of a display panel according to the image equivalent grayscale and the currently used display brightness level includes: Determine the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and a compensation model corresponding to a predetermined preset display brightness level; wherein the compensation model is a corresponding relationship model between grayscale and compensation voltage; Preferably, the compensation voltage of the display panel is determined according to the image equivalent grayscale and the currently used display brightness level, and compensation models corresponding to at least two different preset display brightness levels determined in advance; wherein the compensation models corresponding to at least some of the preset display brightness levels are different; Preferably, the compensation model comprises a first formula; The first formula is: Y = aX 2 +bX+c; wherein Y is the compensation voltage, X is the grayscale, a is the secondary compensation coefficient, b is the primary compensation coefficient, and c is the first compensation adjustment value; When the compensation model includes the first formula, at least one of a, b and c corresponding to at least part of the display brightness levels is different; Preferably, the compensation model comprises a second formula; The second formula is: Y=dX+e; wherein d is the compensation coefficient, and e is the second compensation adjustment value; When the compensation model includes the second formula, at least one of d and e corresponding to at least some of the display brightness levels is different; Preferably, the compensation model used in the same display brightness level range is the same, and the compensation models used in different display brightness level ranges are different; Preferably, the compensation model used in the same display brightness level range is a compensation module corresponding to the maximum display brightness level in the display brightness level range; Preferably, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and compensation models corresponding to at least two different preset display brightness levels, comprises: If the at least two preset display brightness levels do not include the currently used display brightness level, determining at least two first compensation values ​​corresponding to the image equivalent grayscale according to the compensation models corresponding to the at least two preset display brightness levels, and determining the compensation voltage of the display panel according to the at least two first compensation values; Preferably, the compensation model corresponding to the preset display brightness level is determined according to compensation voltages corresponding to a plurality of different display grayscales at the preset display brightness level.

6. The display panel compensation method according to claim 3, characterized in that: Determining a compensation voltage of a display panel according to the image equivalent grayscale and the currently used display brightness level includes: Determining a compensation voltage of a display panel according to the image equivalent grayscale, the currently used display brightness level, and a compensation voltage of a preset display grayscale at a predetermined preset display brightness level; Preferably, the number of preset display brightness levels is at least two, and the number of preset display grayscales at each preset display brightness level is at least two; Preferably, determining the compensation voltage of the display panel according to the image equivalent grayscale and the currently used display brightness level, and the compensation voltage at a preset display grayscale at a predetermined preset display brightness level, comprises: The compensation voltage of the display panel is determined by interpolation according to the image equivalent grayscale and the currently used display brightness level, and the compensation voltages at at least two different preset display grayscales at at least two different preset display brightness levels.

7. The display panel compensation method according to claim 3, characterized in that: Determining the image equivalent grayscale of the image to be displayed includes: Determining a pixel equivalent grayscale of each pixel unit; wherein the display panel includes a plurality of pixel units, and each of the pixel units includes at least three sub-pixels of different luminous colors; Determining an image equivalent grayscale of the image to be displayed according to the pixel equivalent grayscale of each pixel unit; Preferably, determining the image equivalent grayscale of the image to be displayed according to the pixel equivalent grayscale of each pixel unit includes: The image equivalent grayscale of the image to be displayed is determined according to the number of equivalent grayscales of each pixel, the equivalent grayscales of the pixels, and the total number of equivalent grayscales of the pixels of the display panel.

8. The display panel compensation method according to claim 1, characterized in that: The method of performing brightness compensation on the display panel while maintaining the frame according to the compensation voltage comprises: The compensation voltage is input to the source or drain of the driving transistor of each sub-pixel in the display panel during the holding frame; wherein the display panel includes a plurality of sub-pixels, each sub-pixel includes a light-emitting unit and a pixel driving circuit, and the pixel driving circuit includes a driving transistor.

9. A compensation device for a display panel, characterized in that: include: A display brightness level determination module, used to determine the display brightness level currently used by the display panel; A compensation voltage determination module, used to determine the compensation voltage corresponding to the currently used display brightness level; wherein at least some display brightness levels correspond to different compensation voltages; A compensation module is used to perform brightness compensation on the display panel when maintaining a frame according to the compensation voltage; wherein the current picture of the display panel includes a writing frame and at least one maintaining frame, the writing frame includes a data writing stage and a light-emitting stage, and the maintaining frame includes a light-emitting stage.

10. A display device, characterized in that: A compensation device for a display panel comprising a display panel and the display panel as claimed in claim 9.

Images