Compensation method for display panel and display panel

Abstract

The present application provides a display panel compensation method and display panel. The compensation method includes: obtaining brightness values ​​corresponding to m preset points on the multiple test panels based on a first target image of the multiple test panels; determining a first compensation value for the display panel to be compensated based on the brightness values ​​corresponding to the m preset points on the multiple test panels; obtaining multiple image data of the display panel to be compensated based on a second target image of the display panel to be compensated; determining a second compensation value for the display panel to be compensated based on the image data; determining a final compensation value for the display panel to be compensated based on the first compensation value and the second compensation value, and using the final compensation value to compensate the display panel to be compensated. The method utilizes an algorithm to generate a brightness compensation map and compensates the display panel based on a weighted combination of the two compensation values, thereby improving the brightness uniformity of the display panel while also reducing mura defects and enhancing display quality.

Description

Technical Field

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

[0002] Due to the impedance on the PVDD / PVEE traces on the display panel and the trace length, the trace resistance at the far IC end is greater than that at the near IC end. In addition, due to the IR Drop phenomenon in OLED displays, when current passes through the device, the internal voltage of the device drops. As a result, the PVDD voltage at the far IC end is lower than that at the near IC end. Therefore, the OLED driving current at the far IC end is small, resulting in uneven brightness of the entire display panel.

[0003] In the related art, a voltage decay compensation function (Voltage Decay Compensation ON, VDC ON for short) is used to solve the above problem, thereby compensating the brightness of the OLED display panel and solving the problem of uneven brightness of the OLED display panel.

[0004] However, when using voltage attenuation compensation to enter a low-brightness, high-contrast (LHBM) screen, the brightness of the first frame of the screen will show obvious flickering. At this time, it is necessary to turn off VDC, that is, switch VDC ON to VDC OFF. This can solve the flickering problem that occurs in the first frame of the LHBM screen. However, after turning off VDC, the panel's W255 brightness average will deteriorate. Specifically, the brightness average good-to-loss ratio is generally 7.54%. Summary of the Invention

[0005] The main purpose of the present application is to provide a compensation method for a display panel and a display panel, so as to at least solve the problem of uneven panel brightness when VDC is OFF in the related art.

[0006] In order to achieve the objective, according to one aspect of the present application, a compensation method for a display panel is provided, comprising: based on a first target screen of a plurality of test panels, obtaining brightness values ​​corresponding to m preset points on the plurality of test panels; based on the brightness values ​​corresponding to the m preset points of the plurality of test panels, determining a first compensation value of the display panel to be compensated; based on a second target screen of the display panel to be compensated, obtaining a plurality of image data of the display panel to be compensated; based on the image data, determining a second compensation value of the display panel to be compensated; based on the first compensation value and the second compensation value, determining a final compensation value of the display panel to be compensated, and using the final compensation value to compensate the display panel to be compensated.

[0007] According to another aspect of the present application, a compensation method for a display panel is provided, comprising: preparing a plurality of test panels, and performing a brightness test on each of the test panels to obtain brightness values ​​of a plurality of test points on the test panel; using an image acquisition device to perform image acquisition on the display panel to be compensated to obtain image data of the display panel to be compensated; using a processing device to determine a final compensation value of the display panel to be compensated based on a first compensation value and a second compensation value, and writing the final compensation value into a driver integrated circuit so that the driver integrated circuit reads the final compensation value to compensate the display panel to be compensated, wherein the first compensation value is determined based on the brightness values ​​of all the test points, and the second compensation value is extracted from the image data.

[0008] According to another aspect of the present application, a display panel is provided, wherein the display brightness of the display panel is determined by using any one of the display panel compensation methods.

[0009] Applying the technical solution of the present application, the compensation method of the above-mentioned display panel first uses multiple test panels to display a first target picture, and determines a first compensation value of the display panel to be compensated based on the brightness values ​​of multiple preset points on each test panel, and then determines a second compensation value of the display panel to be compensated through the second target picture of the display panel to be compensated; based on the first compensation value and the second compensation value, determines a final compensation value of the display panel to be compensated, and uses the final compensation value to compensate the display panel to be compensated. The method tests a test panel to calculate a first compensation value (i.e., an offset compensation value), determines a second compensation value (i.e., a mura compensation value) based on a second target image of the display panel to be compensated, generates a brightness compensation map using an algorithm based on the first compensation value and the second compensation value, and compensates the display panel using the two compensation values ​​to improve the brightness uniformity of the display panel. This method eliminates the need to turn on a voltage decay compensation function (VDC ON) to compensate the brightness of the display panel, and avoids the need to turn off the VDC (i.e., switch the VDC ON to VDC OFF) when the brightness of the first frame of a low-brightness, high-contrast (LHBM) image shows obvious flickering, thereby avoiding the problem of deteriorated brightness uniformity caused by the need to turn off the VDC, i.e., switch the VDC ON to VDC OFF. This solves the problem of uneven panel brightness when the VDC is OFF in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0011] Figure 1 A schematic structural diagram of a display panel provided according to an embodiment of the present application is shown;

[0012] Figure 2 A schematic diagram illustrating a display principle of a display panel provided according to an embodiment of the present application is shown;

[0013] Figure 3 A schematic flow chart of a compensation method for a display panel provided according to an embodiment of the present application is shown;

[0014] Figure 4 A schematic diagram of a test panel and preset points provided according to an embodiment of the present application is shown;

[0015] Figure 5 A schematic diagram showing a corresponding relationship between a test panel and a first sub-compensation value provided according to an embodiment of the present application is shown;

[0016] Figure 6 A schematic flow chart of another display panel compensation method provided according to an embodiment of the present application is shown;

[0017] Figure 7 A schematic diagram showing a compensation effect of a display panel provided according to an embodiment of the present application is shown;

[0018] Figure 8 A schematic flow chart of another display panel compensation method provided according to an embodiment of the present application is shown.

[0019] The above drawings include the following reference numerals:

[0020] 100. Display panel; 110. Display area; 120. Integrated circuit. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein. In addition, the terms "including" and "having" and any of their variations 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 clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] For ease of description, some nouns or terms involved in the embodiments of the present application are explained below:

[0025] Voltage Decay Compensation (VDC) is a voltage stabilization technology used in power systems. It works by compensating for voltage drops in circuits to maintain voltage stability.

[0026] As introduced in the background technology, Figure 1 As shown, the display panel 100 includes a display area 110 and a non-display area (not shown in the figure), and an integrated circuit 120 (IC) is arranged in the non-display area. Figure 1 and Figure 2 As shown, a plurality of data lines are arranged in the non-display area of ​​the display panel 100 to support the display area 110 to emit light, wherein each row of light-emitting units has a corresponding driving circuit to drive it to emit light, such as Figure 2 As shown, illustratively, there are multiple driving circuits from the near IC end to the IC end for driving the first light emitting unit, the second light emitting unit, the third light emitting unit and the fourth light emitting unit to emit light. Figure 2 As shown in the structure, the PVDD trace in the non-display area of ​​the display panel 100 has impedance, and the trace resistance at the far IC end is greater than that at the near IC end. This results in current attenuation. This reduced current causes the PVDD voltage at the far IC end to be lower than that at the near IC end. This means that the driving current of the OLED (light-emitting unit) at the far IC end is lower, resulting in uneven brightness in the display area 110 of the display panel. Specifically, the image near the IC end is brighter, while the image far from the IC end is darker. In actual use, uneven brightness will occur at the locations near the IC end and far from the IC end on the display area 110.

[0027] In the prior art, a voltage decay compensation function (VDC) is used to avoid the problem of uneven brightness of the entire display panel. Currently, the following VDC ON solution is generally used to compensate for the uneven brightness:

[0028] 1. Measure the load condition of unevenly lit panels;

[0029] 2. Calculate the compensation value of the panel and store it in the DDIC through code;

[0030] 3. Adjust the gain value of pixel Vdata through DDIC to keep the brightness of the upper, middle and lower parts basically consistent.

[0031] However, voltage drop compensation is a voltage stabilization technology used in power systems. It maintains voltage stability by compensating for voltage drops in circuits. However, in low-brightness, high-contrast environments, display devices must compensate for voltage drop based on the input signal to ensure accurate brightness and contrast. However, due to the characteristics of low-brightness, high-contrast environments, voltage drop compensation may not effectively handle brightness changes, resulting in noticeable flickering in the first frame. To avoid flickering, VDC is typically disabled when entering low-brightness, high-contrast (LHBM) environments, switching from VDC ON to VDC OFF. However, disabling VDC degrades the panel's brightness average due to the lack of additional brightness compensation. This results in a deterioration in the panel's W255 brightness average, resulting in a typical brightness average failure rate of 7.54% (this value was experimentally determined: an average of 154 out of 2015 test samples exhibited brightness average failure), which does not meet the display requirements of the application.

[0032] In order to solve the problem of uneven panel brightness when VDC is OFF in the related art, embodiments of the present application provide a compensation method for a display panel and a display panel.

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] In this embodiment, a compensation method for a display panel is provided. It should be noted that, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order different from that shown here.

[0035] Figure 3 FIG. 1 is a flow chart of a compensation method for a display panel according to an embodiment of the present application. Figure 3 As shown, the method includes the following steps:

[0036] Step S101, based on a first target image of a plurality of test panels, obtaining brightness values ​​corresponding to m preset points on the plurality of test panels;

[0037] Among them, such as Figure 4 As shown, Figure 4Fifteen preset points 210 are set on the middle test panel 200, i.e., m = 15. The preset points 210 are arranged along the length of the test panel 200, i.e., along the central axis of the test panel 200. An average of the 15 preset points 210 is taken, and based on the first target image displayed on the test panel 200, the brightness values ​​corresponding to all preset points 210 are obtained. It should be noted that the value of m can be adjusted according to actual application. The above is only one embodiment and is not limited to the above value.

[0038] like Figure 4 As shown, the plurality of preset points 210 on the test panel 200 are arranged according to a preset arrangement rule, and the preset arrangement rule is that the plurality of preset points 210 are arranged from the IC end close to the test panel 200 to the end away from the IC end, or from the end away from the IC end to the end close to the IC end, and / or the preset points 210 on the test panel 200 are arranged at equal intervals, or at non-equal intervals.

[0039] Because the display brightness of the display panel near the IC end and far from the IC end is different, the preset points in the test panel should also be set according to this characteristic of the display panel. That is, the preset points should be set sequentially from the near IC end to the far IC end (or from the far IC end to the near IC end) of the test panel. This can cover the entire range of the display panel to compensate for the brightness of each display area on the panel to be compensated.

[0040] The first target image includes a normal brightness grayscale of 255. A higher grayscale value on the display panel results in a higher brightness value, which in turn increases the current and voltage drop. Therefore, a higher grayscale value on the display panel results in more severe uneven brightness between the areas near the IC end and those far from the IC end on the display area. The first target image can be set to grayscale 255, which effectively compensates for the brightness uniformity of the 255 grayscale.

[0041] In addition, the preset points can be arranged at equal intervals or at non-equal intervals, preferably at equal intervals, so that the entire display area of ​​the display panel can be evenly distributed, and the uniformity and stability of the brightness compensation are higher.

[0042] Step S102, determining a first compensation value of the display panel to be compensated based on the brightness values ​​corresponding to the m preset points of the plurality of test panels;

[0043] Since the display brightness of the display panel near the IC end and far from the IC end is different, the compensation values ​​for the position points near the IC end and far from the IC end of the display panel to be compensated are also different.

[0044] Similarly, when the test panel is tested in advance, since compensation values ​​at different positions of the panel need to be obtained respectively, there should also be corresponding compensation values ​​at different positions of the test panel, that is, the above-mentioned first compensation value includes multiple first sub-compensation values, and the i-th preset point position of the above-mentioned test panel has a corresponding first sub-compensation value, where i≤m, i and m are both positive integers greater than 0.

[0045] Among them, the first compensation value refers to the compensation value for compensating the entire display panel to be compensated, and the first sub-compensation value is the compensation value for compensating different positions of the display panel to be compensated, that is, the first compensation value is a collection of multiple first sub-compensation values, and the first sub-compensation values ​​respectively compensate for the brightness at different positions in the display panel to be compensated.

[0046] Since the display brightness at the near IC end and the far IC end of the display panel is different, and the preset points need to be evenly distributed along the central axis of the display panel, when the display panel displays an image, the brightness values ​​of different preset points are at least partially different, and thus the compensation values ​​of the display panel portions corresponding to different preset points are also at least partially different. Therefore, the above-mentioned first sub-compensation values ​​of at least two different above-mentioned preset points are different.

[0047] In some embodiments, determining a first compensation value of a display panel to be compensated based on the brightness values ​​corresponding to the m preset points of the plurality of test panels includes the following steps:

[0048] Step S201, determining the first sub-compensation value corresponding to each of the m preset points based on the brightness values ​​corresponding to the m preset points respectively;

[0049] The above step S201 further includes the following steps:

[0050] Step S2011: Light up the first target screen of the test panel, and obtain the brightness values ​​of the m preset points in the first target screen;

[0051] Step S2012, determining the jth preset point as the reference point of the test panel, determining the brightness value of the jth preset point of the test panel as the reference brightness value, and determining the brightness value of the ith preset point of the display panel to be compensated as the test brightness value, where j≤m, and j is a positive integer greater than 0;

[0052] In some examples, the j-th preset point is the center position of the display area of ​​the test panel.

[0053] Since the display brightness near the IC end of the display panel is relatively high and the display brightness far from the IC end is relatively low, the display brightness at the center position of the display area of ​​the display panel is generally the center value of the entire display panel. Taking the display brightness at the center position of the display area of ​​the display panel as a reference, the balance and stability of the display image can be better maintained, and the power consumption of the display device can be effectively reduced, thereby extending the service life of the display. In addition, adjusting the display brightness based on the center value of the display brightness of the display panel can ensure the best display effect and avoid overbrightness or overdarkness. Adjusting the display brightness at the center value of the display panel can balance the brightness of the entire screen and ensure image clarity and color accuracy. In addition, adjusting the center value of the display brightness can also effectively save electricity and extend the service life of the display.

[0054] Step S2013: determining the ratio of the test brightness value to the reference brightness value as the first sub-compensation value.

[0055] Specifically, the ratio of the test brightness value to the above-mentioned reference brightness value can reflect the proportional relationship between the brightness value of the i-th preset point and the brightness value of the reference point, and further reflect the degree of difference in brightness between the brightness value of the i-th preset point and the brightness value of the reference point, that is, the degree to which the brightness value of the i-th preset point is brighter (or darker) than the brightness value of the reference point, so that according to the degree of brightness difference, the brightness of the display area corresponding to the i-th preset point on the display panel to be compensated is adjusted. Therefore, in this embodiment, the ratio of the above-mentioned test brightness value to the above-mentioned reference brightness value is determined as the above-mentioned first sub-compensation value.

[0056] Step S202 , determining the first sub-compensation value of the display panel to be compensated according to the first sub-compensation values ​​of all the test panels.

[0057] The test panel at least includes a first preset test panel and a second preset test panel, and the first sub-compensation values ​​of the first preset test panel and the second preset test panel are different.

[0058] To increase the accuracy and application scope of the first sub-compensation value, multiple test panels can be used to confirm the first sub-compensation value. The more test panels used, the more accurate the first sub-compensation value confirmation. However, to consider the impact of cost, the number of test panels should also be limited. Generally, ten test panels are used to obtain ten sets of first compensation values ​​for one preset point.

[0059] In some instances, the first sub-compensation value of the display panel to be compensated is determined based on the first sub-compensation values ​​of all the test panels, including: removing the first sub-compensation value with the lowest value and the first sub-compensation value with the highest value from the first sub-compensation values ​​of all the test panels to obtain a target initial set; and determining the average value of all the first sub-compensation values ​​in the target initial set as the first sub-compensation value.

[0060] Among them, removing the lowest and highest values ​​can eliminate the influence of higher error points on the final calculation results, thereby improving the accuracy of the final calculation results; eliminating the influence of possible extreme values ​​on the average, so that the average more accurately reflects the central trend of the data; reducing the volatility of the data, making the average more representative and better able to reflect the overall characteristics of the data; removing the highest and lowest values ​​can reduce the skewness of the data, making the average more reliable and stable; in some specific cases, such as when the data is interfered with by extreme values ​​or there are outliers, removing the highest and lowest values ​​can make the average more practical and valuable for reference. The above embodiment is one of the calculation methods of the first sub-compensation value.

[0061] In some other examples, determining the first sub-compensation value of the display panel to be compensated based on the first sub-compensation values ​​of all the test panels includes: determining the median of all the first sub-compensation values ​​as the first sub-compensation value of the display panel to be compensated.

[0062] The median can reduce the likelihood of being affected by extreme values ​​because it represents the middle point of all data and is unaffected by extreme values. Compared to the mean, the median better reflects the central tendency of the data, especially when the data distribution is uneven or there are outliers. The median is more representative and better represents the overall data, avoiding the situation where the first sub-compensation value is deviated due to the presence of extreme values. Therefore, the above embodiment provides another method for calculating the first sub-compensation value.

[0063] In some instances, such as Figure 4As shown, the central axis of the test panel is divided into 15 parts, and 15 groups of brightness values ​​are measured respectively. Assume that a group of brightness is measured as follows: 530nit, 540nit, 550nit, 560nit, 570nit, 580nit, 590nit, 600nit, 610nit, 620nit, 630nit, 640nit, 650nit, 660nit, select the center brightness (the eighth value, 600nit) as the base value, the first sub-compensation value offset1 of the first preset point = 600 / 530, and so on. Select ten test panels and calculate ten groups of offset values. From the ten groups, find a group of offset values ​​that can reflect the average brightness change of the ten panels, get the first compensation value (offset value), burn it into the flash to take effect, and fine-tune the offset value according to the actual compensation effect. As shown Figure 5 As shown in FIG, each preset point on the test panel corresponds to an offset value, namely offset1, offset2, offset3, ..., offset15.

[0064] Step S103, acquiring a plurality of image data of the display panel to be compensated based on the second target image of the display panel to be compensated;

[0065] The image data is data obtained by photographing the second target image of the display panel to be compensated.

[0066] Step S104, determining a second compensation value of the display panel to be compensated based on the image data;

[0067] The full grayscale includes grayscales from 0 to 255, and the target grayscale in the full grayscale is all the selected target grayscales. The display panel can be photographed to display each target grayscale and collect brightness parameters; the Demura compensation coefficient can be calculated based on the collected brightness parameters and the expected brightness parameters of the Demura compensation. Alternatively, the collected brightness parameters can be subjected to Mura signal filtering processing, and the extracted point-type Mura, line-type Mura, etc. can be filtered out to calculate the Demura compensation coefficient, and the display repair can be performed on the positions corresponding to the point-type Mura, line-type Mura, etc. The Demura compensation coefficient can be used to participate in the Demura compensation calculation of any grayscale of the display panel, thereby performing Demura compensation on the display of any grayscale of the display panel. The Demura compensation coefficient can be a product coefficient or an offset, which is not limited here. Among them, the Demura compensation coefficient is the above-mentioned second compensation value.

[0068] The specific implementation steps of step S104 are as follows:

[0069] Step S1041, determining the mura value of the image data according to the brightness data of the image data, wherein the brightness data includes at least one of the following: brightness value, grayscale value, and contrast;

[0070] Step S1042 : determining the second compensation value according to the mura value of the image data.

[0071] Specifically, mura refers to the uniformity differences that occur on a display screen, typically manifesting as uneven brightness or color across the display surface. Mura can be used to measure the quality and performance of a display, as well as assess the stability and consistency of the display production process. Therefore, by measuring the mura value of image data, it is possible to characterize the uniformity differences of a display panel, thereby determining a second compensation value to compensate for the uniformity of the display panel.

[0072] Step S105 , determining a final compensation value of the display panel to be compensated based on the first compensation value and the second compensation value, and using the final compensation value to compensate the display panel to be compensated.

[0073] like Figure 6 and Figure 7 As shown, Figure 7 Where O is the display panel to be compensated, A is the compensation panel storing the first compensation value Figure 1 , B is the compensation value stored in the second compensation Figure 2 , P is the final display image of the display panel to be compensated after compensation. Figure 6 As shown, first, the brightness change of the test panel when the VDC function is turned off is measured by the instrument, where the test panel and the display panel to be compensated are the same display panel. Then, the brightness change of the test panel when the VDC function is turned off is converted into a compensation value change through a formula to obtain a first compensation value. The first compensation value is put into the algorithm to generate brightness compensation Figure 1 (like Figure 7 Synchronously take a picture of the display panel to be compensated and generate a mura compensation value including a second compensation value Figure 2 (like Figure 7 As shown in B), the compensation Figure 1 and compensation Figure 2 The binary file directory is generated from the data, and the binary file directory including the first compensation value and the second compensation value is burned into the computer. Finally, the binary file directory is used to compensate the brightness and mura of the display panel to be compensated. The following is obtained: Figure 7 The final display shown in P.

[0074] First, the display panel to be compensated is compensated using the first compensation value and the second compensation value to detect whether the first compensation value and the second compensation value meet the compensation requirements of the display panel to be compensated. After the display panel to be compensated is compensated using the first compensation value and the second compensation value, a preliminary effect detection is performed on the compensated display panel. If the effect of the display panel after the preliminary compensation does not reach the predetermined effect (that is, the brightness of the display panel does not reach the preset brightness), the corresponding first gain coefficient and the second gain coefficient are added to the first compensation value and the second compensation value to obtain a third compensation value and a fourth compensation value to increase the compensation range of the display panel to be compensated, and the third compensation value and the fourth compensation value are used to compensate the display panel to be compensated.

[0075] The method of determining a final compensation value of the display panel to be compensated based on the first compensation value and the second compensation value, and using the final compensation value to compensate the display panel to be compensated comprises the following steps:

[0076] Step S301, obtaining a first gain coefficient and a second gain coefficient, wherein the first gain coefficient is used to amplify or reduce the first compensation value, and the second gain coefficient is used to amplify or reduce the second compensation value;

[0077] The display panel to be compensated includes a plurality of specific DBV values ​​and a plurality of specific grayscales. Each specific grayscale under each specific DBV value corresponds to a first gain coefficient and a second gain coefficient. The obtaining of the first gain coefficient and the second gain coefficient includes the following steps:

[0078] Step S3011, obtaining a target DBV value and a target grayscale of the display panel to be compensated based on the image of the display panel to be compensated;

[0079] Display panels typically come pre-set with multiple display brightness values ​​(DBVs) for adjusting screen brightness. Different display brightness levels can be matched to the display panel in different application environments to provide a better user experience. For example, in brightly lit environments, the display brightness can be increased to allow users to clearly see the content displayed on the display panel. In low-light environments, the display brightness can be lowered to avoid eye irritation caused by a significant difference in brightness between the ambient light and the display panel. Common display panel grayscale nodes refer to the different grayscale levels that a display can display. Generally speaking, a display panel has 255 grayscale nodes.

[0080] Therefore, one display screen of the display panel corresponds to one DBV value and one grayscale. According to the image of the current display screen of the display panel to be compensated, the DBV value and grayscale corresponding to the current display screen can be determined.

[0081] Step S3012, when the target DBV value is the specific DBV value and the target grayscale is the specific grayscale corresponding to the specific DBV value, retrieve the target DBV value and the first gain coefficient and the second gain coefficient corresponding to the target grayscale;

[0082] According to the display characteristics of the display panel, multiple specific DBV values ​​and corresponding target grayscales are pre-set, and a first gain coefficient and a second gain coefficient are set for each specific DBV value and target grayscale. Taking 6 specific DBV values ​​and 5 target grayscales as an example, the set first gain coefficient is shown in Table 1:

[0083] Table 1. Relationship between DBV value, target grayscale and first gain coefficient

[0084] DBV1 DBV2 DBV3 DBV4 DBV5 DBV6 GRAY 1 gain1 gain2 gain3 gain4 gain5 gain6 GRAY 2 gain7 gain8 gain9 gain10 gain11 gain12 GRAY 3 gain13 gain14 gain15 gain16 gain17 gain18 GRAY 4 gain19 gain20 gain21 gain22 gain23 gain24 GRAY 5 gain25 gain26 gain27 gain28 gain29 gain30

[0085] As shown in Table 1, gain1 is the first gain coefficient corresponding to a specific DBV value of DBV1 and a target grayscale of GRAY 1. gain2, ..., gain30 are all first gain coefficients corresponding to different DBV values ​​and target grayscales. Similarly, the second gain coefficients are also set using a similar correspondence table as shown in Table 1, which will not be further elaborated here.

[0086] That is, two sets of gain values ​​are preset, one set of gain values ​​is the corresponding value of the first gain coefficient at different DBV values ​​and target grayscale, and the other set of gain values ​​is the corresponding value of the second gain coefficient at different DBV values ​​and target grayscale.

[0087] Step S3013 : When at least one of the target DBV value or the target grayscale is not a corresponding specific value, determining the first gain coefficient and the second gain coefficient based on a linear interpolation method.

[0088] Specifically, if the DBV value and grayscale corresponding to the image currently displayed on the display panel to be compensated are not any set of set values ​​in the gain coefficient correspondence table, the first gain coefficient and the second gain coefficient are determined based on the linear interpolation method according to the target DBV value and the above-mentioned target grayscale, and accurate first gain coefficients and second gain coefficients can also be obtained.

[0089] In another embodiment, the grayscale to be compensated of the display panel to be compensated is x, and when x≤128, the first gain coefficient is 0, and when x>128, the first gain coefficient is greater than 0. It should be noted that the larger the grayscale value of the display panel, the greater the brightness value of the display panel, the corresponding current is also greater, and the voltage drop is greater. Therefore, the larger the grayscale value of the display panel, the more serious the uneven brightness between the position near the IC end and the position far from the IC end on the display area 110. Conversely, the smaller the brightness grayscale value of the display panel, the smaller the impact of the voltage drop on the brightness uniformity. Therefore, when the grayscale value is small, for example, when the grayscale is not higher than grayscale 128, the first gain coefficient can be set to 0, that is, there is no need to compensate for the brightness uniformity value of the lower grayscale of the row.

[0090] Step S302, determining the product of the first gain coefficient and the first compensation value as a third compensation value;

[0091] Step S303, determining the product of the second gain coefficient and the second compensation value as a fourth compensation value;

[0092] Step S304 , determining a final compensation value of the display panel to be compensated according to the third compensation value and the fourth compensation value, and using the final compensation value to compensate the display panel to be compensated.

[0093] Specifically, the first compensation value is obtained by detecting the test panel, and the second compensation value is obtained based on the mura value of the panel to be compensated. The compensation range of the panel to be compensated using the first compensation value and the second compensation value is small, and may not meet the picture requirements of the panel to be compensated. Therefore, the first gain coefficient and the second gain coefficient are added to obtain the third compensation value and the fourth compensation value, which can increase the compensation range of the panel to be compensated and better meet the picture requirements of the panel to be compensated.

[0094] The method of determining a final compensation value of the display panel to be compensated according to the third compensation value and the fourth compensation value, and using the final compensation value to compensate the display panel to be compensated comprises the following steps:

[0095] Step S401, compensating the display panel to be compensated using the final compensation value to obtain an initial compensation panel;

[0096] Step S402, obtaining the brightness uniformity value and mura value of the initial compensation panel;

[0097] Step S403 : If the display effect of the initial compensation panel does not meet the preset display effect, adjust the third compensation value and / or the fourth compensation value to perform secondary compensation on the initial compensation panel.

[0098] Among them, the display effect of the initial compensation panel is reflected by the brightness uniformity value and mura value of the initial compensation panel, that is, when the brightness uniformity value and mura value of the initial compensation panel are both within the target range, it is determined that the display effect of the initial compensation panel meets the preset display effect; when at least one of the brightness uniformity value and mura value of the initial compensation panel is not within the target range, it is determined that the display effect of the initial compensation panel does not meet the preset display effect.

[0099] That is, if the display effect of the initial compensation panel does not meet the preset display effect, it indicates that the third compensation value and the fourth compensation value still cannot meet the compensation requirements of the panel to be compensated. At this time, it is necessary to continue to increase the compensation range of the panel to be compensated. Therefore, it is necessary to adjust the size of the above-mentioned third compensation value and / or the size of the above-mentioned fourth compensation value to increase the compensation range of the panel to be compensated, thereby performing secondary compensation on the initial compensation panel.

[0100] When the display effect of the above-mentioned initial compensation panel does not meet the preset display effect, the size of the above-mentioned third compensation value and / or the size of the above-mentioned fourth compensation value are adjusted to perform secondary compensation on the above-mentioned initial compensation panel, including: when the brightness uniformity value of the above-mentioned initial compensation panel does not meet the preset brightness uniformity value range, the size of the above-mentioned first gain coefficient is adjusted, and / or the size of the above-mentioned second gain coefficient is adjusted to perform secondary compensation on the above-mentioned initial compensation panel.

[0101] Specifically, if the brightness uniformity value of the initial compensation panel does not fall within a preset brightness uniformity value range, it indicates that the display effect of the initial compensation panel does not meet the preset display effect. In this case, the magnitude of the third compensation value and / or the magnitude of the fourth compensation value need to be adjusted to increase the compensation range of the panel to be compensated, thereby performing secondary compensation on the initial compensation panel. However, the first compensation value is obtained based on test experiments of a test panel, and the second compensation value is obtained based on the mura value of the display panel to be compensated. In other words, the first compensation value and the second compensation value are specific compensation values ​​derived based on the performance of the display panel and cannot be adjusted arbitrarily. Therefore, the third and fourth compensation values ​​can only be adjusted by adjusting the first gain coefficient and the second gain coefficient. In some examples, the third and fourth compensation values ​​can be adjusted accordingly by adjusting only the first gain coefficient, only the second gain coefficient, or the first gain coefficient and the second gain coefficient to increase the compensation range of the panel to be compensated.

[0102] After obtaining the brightness uniformity value and mura value of the initial compensation panel, the method further includes:

[0103] When the brightness uniformity value of the above-mentioned initial compensation panel is greater than the preset brightness uniformity value range, it is determined that the above-mentioned initial compensation panel is in an over-compensation state; if the initial compensation panel is in an over-compensation state, it indicates that the compensation of the initial compensation panel is too large, resulting in excessive brightness, and therefore the third compensation value and the fourth compensation value need to be adjusted.

[0104] That is, when the initial compensation panel is in the over-compensation state, the first gain coefficient is reduced, and / or the second gain coefficient is reduced; thereby reducing the third compensation value, and / or reducing the fourth compensation value.

[0105] If the brightness uniformity value of the initial compensation panel is less than the preset brightness uniformity value range, the initial compensation panel is determined to be in an under-compensation state. The under-compensation state of the initial compensation panel indicates that the compensation of the initial compensation panel is too small, resulting in low brightness, and therefore it is necessary to increase the third compensation value and the fourth compensation value.

[0106] That is, when the initial compensation panel is in the under-compensation state, the first gain coefficient is increased, and / or the second gain coefficient is increased, thereby increasing the third compensation value, and / or the fourth compensation value.

[0107] Wherein, when the display effect of the initial compensation panel does not meet the preset display effect, adjusting the magnitude of the third compensation value and / or the magnitude of the fourth compensation value to perform secondary compensation on the initial compensation panel includes the following steps:

[0108] Step S501, obtaining a first multiple and a second multiple, wherein the first multiple is used to amplify or reduce the third compensation value, and the second multiple is used to amplify or reduce the fourth compensation value;

[0109] Step S502: multiplying the first multiple by the third compensation value to determine a fifth compensation value;

[0110] Step S503, multiplying the second multiple by the fourth compensation value to determine a sixth compensation value;

[0111] Since the setting of the gain value (i.e., the first gain coefficient and the second gain coefficient) also has a certain range, in some cases, the compensation range of the panel to be compensated using the third compensation value and the fourth compensation value may not be able to meet the picture requirements of the panel to be compensated. Therefore, adding the first multiple and the second multiple to obtain the fifth compensation value and the sixth compensation value can further increase the compensation range of the panel to be compensated and better meet the picture requirements of the panel to be compensated.

[0112] Step S504, when the above-mentioned initial compensation panel is in the above-mentioned over-compensation state, reduce the above-mentioned first multiple, and / or reduce the second multiple; when the initial compensation panel is in the over-compensation state, it indicates that the compensation of the initial compensation panel is too large, resulting in excessive brightness, and therefore it is necessary to reduce the third compensation value and the fourth compensation value. Therefore, by reducing the first multiple, and / or reducing the second multiple, the third compensation value is reduced, and / or the fourth compensation value is reduced, thereby meeting the compensation picture requirements of the display panel to be compensated.

[0113] Step S505: When the initial compensation panel is in the under-compensation state, the first multiplier is increased, and / or the second multiplier is increased. If the initial compensation panel is in the under-compensation state, this indicates that the initial compensation panel's compensation is too low, resulting in too low brightness. Therefore, the third compensation value and the fourth compensation value need to be increased. Therefore, by increasing the first multiplier and / or the second multiplier, the third compensation value is increased, and / or the fourth compensation value is increased, thereby meeting the compensation image requirements of the display panel to be compensated.

[0114] Using the final compensation value to compensate the display panel to be compensated includes the following steps:

[0115] Step S601, determining the target display brightness and target grayscale corresponding to each display area of ​​the display panel to be compensated;

[0116] Step S602, determining a target data signal of a target pixel circuit corresponding to the display area according to the target grayscale and gamma curve;

[0117] In step S603 , the target data signal is inputted into the target pixel circuit to drive the target pixel circuit so that each display area of ​​the display panel to be compensated displays a corresponding target display brightness.

[0118] As shown in the above steps, in some embodiments, the display area of ​​the display panel can be divided into two or more display regions, with the display regions arranged from the near IC end to the far IC end on the display panel, or from the far IC end to the near IC end on the display panel. Each display region corresponds to a display brightness and grayscale. Based on the grayscale and gamma curve, a target data signal for the target pixel circuit corresponding to the region can be determined, thereby causing the pixel circuit driving the display in the display region to operate.

[0119] Among them, using the above-mentioned final compensation value to compensate the above-mentioned display panel to be compensated includes: writing the above-mentioned final compensation value into the driver integrated circuit, so that the above-mentioned driver integrated circuit reads the above-mentioned final compensation value to compensate for the display effect of the above-mentioned display panel to be compensated, wherein the above-mentioned first compensation value is used to compensate for the brightness uniformity of the above-mentioned display panel to be compensated, and the above-mentioned second compensation value is used to compensate for at least the mura of the above-mentioned display panel to be compensated.

[0120] In the display panel, each row of the display area corresponds to a driving circuit to drive the display, and the final compensation value is written into the driving integrated circuit. The driving signal of the corresponding driving circuit in the driving integrated circuit is determined according to the final compensation value of each display area to compensate the display area.

[0121] The compensation method for the above-mentioned display panel of the present application first uses multiple test panels to display a first target picture, and determines a first compensation value of the display panel to be compensated based on the brightness values ​​of multiple preset points on each test panel, and then determines a second compensation value of the display panel to be compensated through the second target picture of the display panel to be compensated; based on the first compensation value and the second compensation value, determines a final compensation value of the display panel to be compensated, and uses the final compensation value to compensate the display panel to be compensated. The method tests a test panel to calculate a first compensation value (i.e., an offset compensation value), determines a second compensation value (i.e., a mura compensation value) based on a second target image of the display panel to be compensated, generates a brightness compensation map using an algorithm based on the first compensation value and the second compensation value, and compensates the display panel using the two compensation values ​​to improve the brightness uniformity of the display panel. This method eliminates the need to turn on a voltage decay compensation function (VDC ON) to compensate the brightness of the display panel, and avoids the need to turn off the VDC (i.e., switch the VDC ON to VDC OFF) when the brightness of the first frame of a low-brightness, high-contrast (LHBM) image shows obvious flickering, thereby avoiding the problem of deteriorated brightness uniformity caused by the need to turn off the VDC, i.e., switch the VDC ON to VDC OFF. This solves the problem of uneven panel brightness when the VDC is OFF in the related art.

[0122] In some examples, the five-axis 135-point test is used to compare the brightness average before and after demura, as shown in Table 2. In Table 2, LU-Demura on is the solution of this embodiment, and Figure 7 The compensation value of the first compensation value is stored in Figure 1 and a compensation value having a second compensation value stored therein Figure 2 The luminance average after compensation of the display panel O to be compensated is LU-Demura off in Table 2, which is the luminance average after compensation of the display panel to be compensated using the prior art. It can be clearly seen that the luminance average of the display panel to be compensated is significantly improved after compensation using the technology of this embodiment.

[0123] Table 2. Comparison of compensation effects between this embodiment and the prior art

[0124] LU-Demura on △uv-A △uv-B LU-Demura off △uv-A △uv-B #5 91.77％ 0.0061 0.0018 83.29％ 0.0059 0.0022 #9 93.05％ 0.0041 0.0017 84.47％ 0.0042 0.002 #33 90.70％ 0.0049 0.0011 82.57％ 0.0047 0.001 #17 94.26％ 0.0037 0.0013 86.77％ 0.0033 0.0013 #7 90.78％ 0.0034 0.0015 82.33％ 0.0029 0.0014 MIN 90.70％ 0.0034 0.0011 82.33％ 0.0029 0.0010 AVE 92.11％ 0.0044 0.0015 83.89％ 0.0042 0.0016 MAX 94.26％ 0.0061 0.0018 86.77％ 0.0059 0.0022

[0125] In this embodiment, a compensation method for a display panel is also provided. Figure 8 As shown, the method includes the following steps:

[0126] Step S701: prepare a plurality of test panels, and perform a brightness test on each of the test panels to obtain brightness values ​​of a plurality of test points on the test panels;

[0127] Step S702, using an image acquisition device to acquire an image of the display panel to be compensated, to obtain image data of the display panel to be compensated;

[0128] In step S703, a processing device is used to determine a final compensation value of the display panel to be compensated based on the first compensation value and the second compensation value, and the final compensation value is written into a driver integrated circuit so that the driver integrated circuit reads the final compensation value to compensate the display panel to be compensated. The first compensation value is determined based on the brightness values ​​of all the test points, and the second compensation value is extracted from the image data.

[0129] The compensation method for the display panel of the present application first performs a brightness test on each test panel to obtain the brightness values ​​of multiple test points on the test panel; then uses an image acquisition device to perform image acquisition on the display panel to be compensated to obtain image data of the display panel to be compensated; finally uses a processing device to determine the final compensation value of the display panel to be compensated based on the first compensation value and the second compensation value. The method tests the test panel to calculate a first compensation value (i.e., an offset compensation value), determines a second compensation value (i.e., a mura compensation value) based on a second target image of the display panel to be compensated, generates a brightness compensation map using an algorithm based on the first compensation value and the second compensation value, and compensates the display panel using the two compensation values ​​to improve the brightness uniformity of the display panel while also improving the mura defect. There is no need to turn on the voltage attenuation compensation function (VDCON) to perform brightness compensation on the display panel, and it can also avoid the problem of deterioration of brightness uniformity caused by turning off the VDC when the brightness of the first frame of the picture shows obvious flickering when entering a low brightness high contrast (LHBM) picture, that is, switching the VDC ON to VDC OFF, thereby solving the problem of uneven panel brightness when the VDC is OFF in the related art.

[0130] In this embodiment, a display panel is also provided. Figure 1As shown, the display panel 100 includes a display area 110 , and the display brightness of the display panel 100 is determined by using any one of the above-mentioned display panel compensation methods.

[0131] The display brightness of the display panel of the present application is determined by using any of the above-mentioned display panel compensation methods. A brightness compensation map is generated by an algorithm based on the first compensation value and the second compensation value, and the display panel is compensated by the two compensation values ​​to improve the brightness uniformity of the display panel. There is no need to turn on the voltage decay compensation function (VDC ON) to compensate the brightness of the display panel. This can also avoid the problem of deterioration of brightness uniformity caused by turning off VDC, i.e., switching VDC ON to VDC OFF, when the brightness of the first frame of the picture shows obvious flickering when entering a low-brightness high-contrast (LHBM) picture. This solves the problem of uneven panel brightness when VDC OFF in the related art.

[0132] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0133] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0134] 1) The compensation method for the above-mentioned display panel of the present application first uses multiple test panels to display a first target picture, and determines a first compensation value of the display panel to be compensated based on the brightness values ​​of multiple preset points on each test panel, and then determines a second compensation value of the display panel to be compensated through the second target picture of the display panel to be compensated; based on the first compensation value and the second compensation value, determines a final compensation value of the display panel to be compensated, and uses the final compensation value to compensate the display panel to be compensated. The method tests a test panel to calculate a first compensation value (i.e., an offset compensation value), determines a second compensation value (i.e., a mura compensation value) based on a second target image of the display panel to be compensated, generates a brightness compensation map using an algorithm based on the first compensation value and the second compensation value, and compensates the display panel using the two compensation values ​​to improve the brightness uniformity of the display panel. This method eliminates the need to turn on a voltage decay compensation function (VDC ON) to compensate the brightness of the display panel, and avoids the need to turn off the VDC (i.e., switch the VDC ON to VDC OFF) when the brightness of the first frame of a low-brightness, high-contrast (LHBM) image shows obvious flickering, thereby avoiding the problem of deteriorated brightness uniformity caused by the need to turn off the VDC, i.e., switch the VDC ON to VDC OFF. This solves the problem of uneven panel brightness when the VDC is OFF in the related art.

[0135] 2) The compensation method for the display panel of the present application first performs a brightness test on each test panel to obtain the brightness values ​​of multiple test points on the test panel; then uses an image acquisition device to perform image acquisition on the display panel to be compensated to obtain image data of the display panel to be compensated; finally uses a processing device to determine the final compensation value of the display panel to be compensated based on the first compensation value and the second compensation value. The method tests the test panel to calculate a first compensation value (i.e., an offset compensation value), determines a second compensation value (i.e., a mura compensation value) based on a second target image of the display panel to be compensated, generates a brightness compensation map based on the first compensation value and the second compensation value using an algorithm, and compensates the display panel with the two compensation values ​​to improve the brightness uniformity of the display panel. There is no need to turn on the voltage attenuation compensation function (VDC ON) to perform brightness compensation on the display panel. This can also avoid the problem of deterioration of brightness uniformity caused by turning off the VDC when the brightness of the first frame of the picture shows obvious flickering when entering a low brightness high contrast (LHBM) picture, that is, converting the VDC ON to VDC OFF. This solves the problem of uneven panel brightness when the VDC is OFF in the related art.

[0136] 3) The display brightness of the display panel of the present application is determined by using any of the above-mentioned display panel compensation methods. A brightness compensation map is generated using an algorithm based on the first compensation value and the second compensation value, and the display panel is compensated by the two compensation values ​​to improve the brightness uniformity of the display panel. There is no need to turn on the voltage decay compensation function (VDC ON) to compensate the brightness of the display panel. This can also avoid the problem of worsening brightness uniformity caused by turning off VDC, i.e., switching VDC ON to VDC OFF, when the brightness of the first frame of the picture shows obvious flickering when entering a low-brightness high-contrast (LHBM) picture. This solves the problem of uneven panel brightness when VDC OFF in the related art.

[0137] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A compensation method for a display panel, characterized in that: include: Based on a first target image of a plurality of test panels, obtaining brightness values ​​corresponding to m preset points on the plurality of test panels; determining a first compensation value of the display panel to be compensated based on the brightness values ​​corresponding to the m preset points of the plurality of test panels; acquiring a plurality of image data of the display panel to be compensated based on a second target picture of the display panel to be compensated; determining a second compensation value of the display panel to be compensated based on the image data; determining a final compensation value of the display panel to be compensated based on the first compensation value and the second compensation value, and using the final compensation value to compensate the display panel to be compensated; The first compensation value includes a plurality of first sub-compensation values, and each of the i-th preset points on the test panel has a corresponding first sub-compensation value, where i≤m, and both i and m are positive integers greater than 0; The plurality of preset points on the test panel are arranged according to a preset arrangement rule, wherein the preset arrangement rule is a rule that the plurality of preset points are arranged from the IC end close to the test panel to the IC end away from the IC end, or a rule that the plurality of preset points are arranged from the IC end away from the IC end to the IC end close to the IC end. Determining a second compensation value of the display panel to be compensated based on the image data includes: Determine the mura value of the image data according to brightness data of the image data, wherein the brightness data includes at least one of the following: brightness value, grayscale value, and contrast; The second compensation value is determined according to the mura value of the image data.

2. The compensation method according to claim 1, characterized in that: The first sub-compensation values ​​of at least two different preset points are different.

3. The compensation method according to claim 1, characterized in that: Determining a first compensation value of a display panel to be compensated based on the brightness values ​​corresponding to the m preset points of the plurality of test panels, including: Determining the first sub-compensation value corresponding to each of the m preset points based on the brightness values ​​corresponding to the m preset points respectively; The first sub-compensation value of the display panel to be compensated is determined according to the first sub-compensation values ​​of all the test panels.

4. The compensation method according to claim 3, characterized in that: Determining the first sub-compensation value corresponding to each of the m preset points based on the brightness values ​​corresponding to the m preset points respectively includes: Lighting up a first target screen of the test panel and acquiring brightness values ​​of the m preset points under the first target screen; Determine the jth preset point as the reference point of the test panel, determine the brightness value of the jth preset point of the test panel as the reference brightness value, and determine the brightness value of the ith preset point of the display panel to be compensated as the test brightness value, where j≤m, and j is a positive integer greater than 0; A ratio of the test brightness value to the reference brightness value is determined as the first sub-compensation value.

5. The compensation method according to claim 4, characterized in that: The j-th preset point is the center position of the display area of ​​the test panel.

6. The compensation method according to claim 3, characterized in that: Determining the first sub-compensation value of the display panel to be compensated according to the first sub-compensation values ​​of all the test panels includes: removing the first sub-compensation value with the lowest value and the first sub-compensation value with the highest value from all the first sub-compensation values ​​of the test panel to obtain a target initial set; An average value of all the first sub-compensation values ​​in the target initial set is determined as the first sub-compensation value.

7. The compensation method according to claim 3, characterized in that: Determining the first sub-compensation value of the display panel to be compensated according to the first sub-compensation values ​​of all the test panels includes: A median of all the first sub-compensation values ​​is determined as the first sub-compensation value of the display panel to be compensated.

8. The compensation method according to claim 1, characterized in that: The test panel includes at least a first preset test panel and a second preset test panel, and the first sub-compensation values ​​of the first preset test panel and the second preset test panel are different.

9. The compensation method according to claim 1, characterized in that: The preset points on the test panel are arranged at equal intervals or at non-equal intervals.

10. The compensation method according to claim 1, characterized in that: Using the final compensation value to compensate the display panel to be compensated includes: The final compensation value is written into a driver integrated circuit so that the driver integrated circuit reads the final compensation value to compensate for the display effect of the display panel to be compensated, wherein the first compensation value is used to compensate for the brightness uniformity of the display panel to be compensated, and the second compensation value is used to compensate for at least the mura of the display panel to be compensated.

11. The compensation method according to claim 1, characterized in that: Determining a final compensation value of the display panel to be compensated based on the first compensation value and the second compensation value, and using the final compensation value to compensate the display panel to be compensated, comprising: Obtaining a first gain coefficient and a second gain coefficient, wherein the first gain coefficient is used to amplify or reduce the first compensation value, and the second gain coefficient is used to amplify or reduce the second compensation value; determining a third compensation value by multiplying the first gain coefficient by the first compensation value; determining a product of the second gain coefficient and the second compensation value as a fourth compensation value; A final compensation value of the display panel to be compensated is determined according to the third compensation value and the fourth compensation value, and the final compensation value is used to compensate the display panel to be compensated.

12. The compensation method according to claim 11, characterized in that: The display panel to be compensated includes a plurality of specific DBV values ​​and a plurality of specific grayscales, and each specific grayscale under each specific DBV value corresponds to a first gain coefficient and a second gain coefficient. The obtaining of the first gain coefficient and the second gain coefficient includes: acquiring a target DBV value and a target grayscale of the display panel to be compensated based on the image of the display panel to be compensated; When the target DBV value is the specific DBV value and the target grayscale is the specific grayscale corresponding to the specific DBV value, retrieving the target DBV value and the first gain coefficient and the second gain coefficient corresponding to the target grayscale; In a case where at least one of the target DBV value or the target grayscale is not a corresponding specific value, the first gain coefficient and the second gain coefficient are determined based on a linear interpolation method.

13. The compensation method according to claim 11, characterized in that: The grayscale to be compensated of the display panel to be compensated is x. When x≤128, the first gain coefficient is 0. When x>128, the first gain coefficient is greater than 0.

14. The compensation method according to claim 11, characterized in that: Determining a final compensation value of the display panel to be compensated according to the third compensation value and the fourth compensation value, and using the final compensation value to compensate the display panel to be compensated, comprising: Compensating the display panel to be compensated using the final compensation value to obtain an initial compensated panel; Obtaining a brightness uniformity value and a mura value of the initial compensation panel; When the display effect of the initial compensation panel does not meet the preset display effect, the magnitude of the third compensation value and / or the magnitude of the fourth compensation value are adjusted to perform secondary compensation on the initial compensation panel.

15. The compensation method according to claim 14, characterized in that: When the display effect of the initial compensation panel does not meet the preset display effect, adjusting the magnitude of the third compensation value and / or the magnitude of the fourth compensation value to perform secondary compensation on the initial compensation panel includes: When the brightness uniformity value of the initial compensation panel does not meet the preset brightness uniformity value range, the first gain coefficient is adjusted, and / or the second gain coefficient is adjusted to perform secondary compensation on the initial compensation panel.

16. The compensation method according to claim 14, characterized in that: After obtaining the brightness uniformity value and the mura value of the initial compensation panel, the method further includes: When the brightness uniformity value of the initial compensation panel is greater than a preset brightness uniformity value range, determining that the initial compensation panel is in an over-compensation state; When the brightness uniformity value of the initial compensation panel is less than the preset brightness uniformity value range, it is determined that the initial compensation panel is in an under-compensation state.

17. The compensation method according to claim 16, characterized in that: When the initial compensation panel is in the over-compensation state, reducing the first gain coefficient, and / or reducing the second gain coefficient; When the initial compensation panel is in the under-compensation state, the first gain coefficient is increased, and / or the second gain coefficient is increased.

18. The compensation method according to claim 16, characterized in that: When the display effect of the initial compensation panel does not meet the preset display effect, adjusting the size of the third compensation value and / or the size of the fourth compensation value to perform secondary compensation on the initial compensation panel includes: Obtaining a first multiplier and a second multiplier, wherein the first multiplier is used to amplify or reduce the third compensation value, and the second multiplier is used to amplify or reduce the fourth compensation value; determining a fifth compensation value by multiplying the first multiple by the third compensation value; determining a sixth compensation value by multiplying the second multiple by the fourth compensation value; When the initial compensation panel is in the over-compensation state, reducing the first multiple and / or reducing the second multiple; When the initial compensation panel is in the under-compensation state, the first multiple is increased, and / or the second multiple is increased.

19. The compensation method according to claim 1, characterized in that: Using the final compensation value to compensate the display panel to be compensated includes: Determining target display brightness and target grayscale corresponding to each display area of ​​the display panel to be compensated; determining a target data signal of a target pixel circuit corresponding to the display area according to the target grayscale and gamma curve; The target data signal is input to the target pixel circuit to drive the target pixel circuit so that each display area of ​​the display panel to be compensated displays a corresponding target display brightness.

20. The compensation method according to claim 1, characterized in that: The first target image includes a normal brightness 255 grayscale.

21. A compensation method for a display panel, characterized in that: include: Preparing a plurality of test panels and performing a brightness test on each of the test panels to obtain brightness values ​​of a plurality of test points on the test panel; Using an image acquisition device to acquire an image of the display panel to be compensated, to obtain image data of the display panel to be compensated; Determining a final compensation value of the display panel to be compensated based on the first compensation value and the second compensation value using a processing device, and writing the final compensation value into a driver integrated circuit so that the driver integrated circuit reads the final compensation value to compensate the display panel to be compensated, wherein the first compensation value is determined based on the brightness values ​​of all the test points, and the second compensation value is extracted from the image data; The first compensation value includes a plurality of first sub-compensation values, and each i-th preset point on the test panel has a corresponding first sub-compensation value, where i≤m, and i and m are both positive integers greater than 0; the plurality of preset points on the test panel are arranged according to a preset arrangement rule, and the preset arrangement rule is a rule that the plurality of preset points are arranged from the IC end close to the IC end of the test panel to the IC end far away, or a rule that the plurality of preset points are arranged from the IC end far away to the IC end close to the IC end, The second compensation value is obtained by the following steps: Determine the mura value of the image data according to brightness data of the image data, wherein the brightness data includes at least one of the following: brightness value, grayscale value, and contrast; The second compensation value is determined according to the mura value of the image data.

22. A display panel, characterized in that: The display brightness of the display panel is determined by using the compensation method for a display panel according to any one of claims 1 to 21.

Images