Compensation method of display panel and display panel

Abstract

The invention provides a compensation method of a display panel and the display panel, and the compensation method comprises the steps: obtaining brightness values corresponding to m preset point positions on a plurality of test panels based on first target pictures of the plurality of test panels; determining a first compensation value of the to-be-compensated display panel based on the brightness values corresponding to the m preset point positions of the plurality of test panels; based on a second target picture of the to-be-compensated display panel, multiple pieces of image data of the to-be-compensated display panel are acquired; determining a second compensation value of the display panel to be compensated based on the image data; and determining a final compensation value of the to-be-compensated display panel based on the first compensation value and the second compensation value, and compensating the to-be-compensated display panel by adopting the final compensation value. According to the method, the brightness compensation graph is generated by using the algorithm, the display panel is compensated based on the weighting of the two compensation values, the brightness uniformity of the display panel is improved, the mura defect can be improved, and the display quality is improved.

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] Since there is impedance on the PVDD / PVEE traces on the display panel and due to the trace length problem, the trace resistance at the far IC end is larger than that at the near IC end. In addition, due to the IR Drop phenomenon in the OLED display, 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 smaller 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 overall 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, convert 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 W255 brightness of the panel will deteriorate. Specifically, the brightness average 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 picture of a plurality of test panels, obtaining brightness values ​​respectively corresponding to m preset points on the plurality of test panels; based on the brightness values ​​respectively corresponding to the m preset points of the plurality of test panels, determining a first compensation value of a display panel to be compensated; based on a second target picture 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 a 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 according to 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 according to 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 compensation methods for the display panel.

[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 according to 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 a 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 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) through a second target screen of the display panel to be compensated, generates a brightness compensation map by using an algorithm according to the first compensation value and the second compensation value, compensates the display panel by using the two compensation values, improves the brightness uniformity of the display panel, and does not need to perform brightness compensation of the display panel by turning on a voltage attenuation compensation function (VDC ON). This can also avoid the problem of deterioration of brightness uniformity caused by turning off VDC, i.e., converting VDC ON to VDC OFF, when the brightness of the first frame of a low-brightness high-contrast (LHBM) screen shows obvious flickering. This solves the problem of uneven panel brightness when VDC is OFF in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0012] Figure 2 A schematic diagram showing 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 in the embodiments of the present 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 solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present 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 here. 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 comprising 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 the convenience of description, some nouns or terms involved in the embodiments of the present application are explained below:

[0025] Voltage Decay Compensation Function: Voltage Decay Compensation, referred to as VDC, is a voltage stabilization technology used in power systems. Its principle is to maintain voltage stability in the circuit by compensating for the voltage drop in the circuit.

[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, exemplarily, 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, there is impedance on the PVDD line in the non-display area of ​​the display panel 100, and the line resistance at the far IC end is larger than that at the near IC end, that is, there is current attenuation, and the reduction of current causes the PVDD voltage at the far IC end to be smaller than that at the near IC end, that is, the driving current of the OLED (light-emitting unit) at the far IC end is small, which will cause uneven brightness displayed in the display area 110 of the display panel, that is, the picture at the near IC end is bright, and the picture at the far IC end is dark. That is, in actual application, the position near the IC end and the position at the far IC end on the display area 110 will have uneven brightness.

[0027] In the prior art, in order to avoid the problem of uneven brightness of the display panel, a voltage attenuation compensation function (VDC) is used. Currently, the following VDC ON scheme 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 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, the voltage decay compensation function is a voltage stabilization technology used in power systems. Its principle is to maintain the voltage stability in the circuit by compensating for the voltage drop in the circuit. However, when entering the low brightness and high contrast, the display device needs to perform voltage decay compensation according to the input signal to ensure that the brightness and contrast of the screen display can be correctly presented. However, due to the characteristics of low brightness and high contrast, the voltage decay compensation function may not be able to effectively handle the brightness changes of the screen, resulting in obvious flicker problems in the first frame of the screen. Therefore, in order to avoid the flicker problem of the screen, VDC is generally turned off when entering the low brightness and high contrast (LHBM) screen, that is, VDC ON is converted to VDC OFF. However, after turning off VDC, the panel will experience a deterioration in brightness due to the lack of additional brightness compensation, which will cause the W255 brightness of the panel to deteriorate, that is, the brightness average loss is generally 7.54% (this value is obtained through experiments, that is, among the 2015 test samples, an average of 154 samples have brightness average loss), which cannot meet the needs of the screen in the application.

[0032] In order to solve the problem of uneven panel brightness when VDC is OFF in the related art, an embodiment of the present application provides 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 in conjunction with 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 sequence is shown in the flow chart, 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 comprises the following steps:

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

[0037] Among them, Figure 4 As shown, Figure 4There are 15 preset points 210 set on the test panel 200, that is, m=15. The preset points 210 are set along the length direction of the test panel 200, that is, along the central axis of the test panel 200, and 15 preset points 210 are averaged, and based on the first target picture displayed by the test panel 200, the brightness values ​​corresponding to all the preset points 210 are obtained. It should be noted that the value of m can be adjusted according to the actual application. The above is only an embodiment and is not limited to the above values.

[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 a rule that the plurality of preset points 210 are arranged from an IC end close to the test panel 200 to an end far from the IC end, or a rule that the plurality of preset points 210 are arranged from an end far from the IC end to an 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] Since the display brightness of the near IC end and the far IC end of the display panel is different, the setting of the preset points in the test panel should also be set according to this characteristic of the display panel, that is, the preset points are set in sequence 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. In this way, the preset points can be spread over all ranges on 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 conventional brightness grayscale of 255. The larger the grayscale value of the display panel, the larger the brightness value of the display panel, the larger the corresponding current, and the larger the voltage drop. 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. The first target image can be set to grayscale 255, so the brightness uniformity of grayscale 255 can be better compensated.

[0041] In addition, the preset points may 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 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 near IC end and the far IC end of the display panel to be compensated is different, the compensation values ​​of the position points near the IC end and the far 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 of the near IC end and the far IC end of the display panel is different, and the setting of the preset points needs to be evenly distributed on the central axis of the display panel, therefore, when the display panel displays the picture, the brightness values ​​of different preset points are at least partially different, so that the compensation values ​​of the display panel parts 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 examples, determining the 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 respectively comprises 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, lighting up the first target screen of the test panel, and obtaining the brightness values ​​of the m preset points under 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, wherein 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 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 of the display area of ​​the display panel as a reference, the balance and stability of the display screen can be better maintained, and the power consumption of the display device can be effectively reduced, and the service life of the display can be extended. 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 a 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] In order to increase the accuracy of the first sub-compensation value and the scope of application scenarios, multiple test panels can be selected to confirm the first sub-compensation value. The more test panels are selected, the more accurate the confirmation of the first sub-compensation value is. However, in order to consider the impact of cost, the number of test panels also needs to be controlled. 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 and improve 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 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 according to 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] Among them, the median can reduce the possibility of being affected by extreme values, because it is the point of the middle value of all data and is not affected by extreme values. Compared with the average value, the median can better reflect the central tendency of the data, especially when the data distribution is uneven or there are outliers. The median is more representative and can better represent the overall data situation, avoiding the situation where the first sub-compensation value is deviated due to the existence of extreme values. Therefore, the above embodiment is another way to calculate 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 flash to take effect, and fine-tune the offset value according to the actual compensation effect. Figure 5 As shown, 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 picture of the display panel to be compensated;

[0065] The above-mentioned 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, or 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 corresponding positions of the point-type Mura, line-type Mura, etc. can be displayed and repaired. The Demura compensation coefficient can be used to participate in the Demura compensation calculation of any grayscale of the display panel, so as to perform Demura compensation for 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 the above 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, gray value, and contrast;

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

[0071] Specifically, the mura value refers to the uniformity difference that appears on the display screen, which is usually manifested as uneven brightness or color on the display surface. The mura value can be used to measure the quality and performance of the display, as well as to evaluate the stability and consistency of the display production process. Therefore, by testing the mura value of the image data, the uniformity difference of the display panel can be characterized, thereby determining the 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, and A is the compensation panel storing the first compensation value. Figure 1 , B is the compensation value storing the second compensation value Figure 2 , P is the final display image of the display panel to be compensated after compensation. Figure 6 As shown, firstly, the brightness change of the test panel when the VDC function is turned off is measured by an instrument, wherein the test panel and the display panel to be compensated are the same display panel, and then the brightness change of the test panel when the VDC function is turned off is converted into a compensation value change by a formula to obtain a first compensation value, and the first compensation value is put into the algorithm to generate brightness compensation Figure 1 (like Figure 7 ); synchronously taking a picture of the display panel to be compensated, generating a mura compensation 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 of the first compensation value and the second compensation value, 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. Figure 7 The final display shown in P.

[0074] Firstly, the display panel to be compensated is compensated by 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 requirement of the display panel to be compensated. After the display panel to be compensated is compensated by 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 the third compensation value and the 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] Wherein, based on the first compensation value and the second compensation value, determining the final compensation value of the display panel to be compensated, 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 first gain coefficient and the second gain coefficient are obtained, including the following steps:

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

[0079] Among them, the display panel is usually pre-set with multiple display brightness (DisplayBrightness Value, DBV) for adjusting the screen brightness. In different application environments, different display brightness can be matched for the display panel to bring a good user experience. For example, in a bright environment, the display brightness can be increased so that the user can see the content displayed on the display panel clearly, while in a weak environment, the display brightness can be lowered to avoid the large difference in brightness between the ambient light and the display panel, which may cause eye pain to the user. . The grayscale nodes of a common display panel refer to the nodes of different gray levels that the display can display. Generally speaking, the number of grayscale nodes of a display panel is 255.

[0080] Therefore, one display screen of the display panel corresponds to one DBV value and one gray scale. According to the image of the current display screen of the display panel to be compensated, the DBV value and gray scale 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 multiple target grayscales are pre-set, and the first gain coefficient and the second gain coefficient corresponding to each specific DBV value and the target grayscale are set. Taking the case where there are 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 the specific DBV value of DBV1 and the target grayscale of GRAY 1, and gain2, ..., gain30 are all first gain coefficients corresponding to different DBV values ​​and target grayscales. Similarly, the second gain coefficient is also set to a similar corresponding table as shown in Table 1, which will not be elaborated in detail here.

[0086] That is, two groups of gain values ​​are preset, one group of gain values ​​is the corresponding value of the first gain coefficient under different DBV values ​​and target grayscale, and the other group of gain values ​​is the corresponding value of the second gain coefficient under 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, determine 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 corresponding 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, 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 larger the brightness value of the display panel, the larger the corresponding current, and the larger the voltage drop. 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. On the contrary, the smaller the brightness grayscale value of the display panel, the smaller the influence of the brightness uniformity caused by the voltage drop. Therefore, when the grayscale value is small, for example, when the grayscale is not higher than 128 grayscales, the first gain coefficient can be set to 0, that is, the brightness uniformity value of the lower grayscale of the row does not need to be compensated.

[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 according to 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 the 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, using the final compensation value to compensate the display panel to be compensated, 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, 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.

[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 means 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, when the brightness uniformity value of the initial compensation panel does not meet the preset brightness uniformity value range, it indicates that the display effect of the initial compensation panel does not meet the preset display effect, that is, it is necessary to adjust the size of the third compensation value and / or the size of the fourth compensation value at this time 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 the test experiment of the test panel, and the second compensation value is obtained based on the mura value of the display panel to be compensated, that is, the first compensation value and the second compensation value are specific compensation values ​​obtained based on the performance of the display panel and cannot be adjusted at will. Therefore, the third compensation value and the fourth compensation value can only be adjusted by adjusting the first gain coefficient and the second gain coefficient. In some instances, the third compensation value and the fourth compensation value 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, so as 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, so 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 the fourth compensation value.

[0105] 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. 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, so the third compensation value and the fourth compensation value need to be increased.

[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, so as to increase 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 size of the third compensation value and / or the size of the fourth compensation value to perform secondary compensation on the initial compensation panel comprises the following steps:

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

[0109] Step S502, determining the product of the first multiple and the third compensation value as a fifth compensation value;

[0110] Step S503, determining the product of the second multiple and the fourth compensation value as 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, to reduce the third compensation value, and / or reducing the fourth compensation value, so as to meet 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, increase the first multiple, and / or increase the second multiple. When the initial compensation panel is in the under-compensation state, it indicates that the compensation of the initial compensation panel is too small, resulting in too low brightness, so it is necessary to increase the third compensation value and the fourth compensation value. Therefore, by increasing the first multiple, and / or increasing the second multiple, the third compensation value is increased, and / or the fourth compensation value is increased, so as to meet the compensation picture 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] Step S603 , inputting the target data signal 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.

[0118] As shown in the above steps, in some embodiments, the display area of ​​the display panel can be divided into more than two display areas, and each display area is arranged from the near IC end to the far IC end on the display panel, or arranged from the far IC end to the near IC end on the display panel. Each display area corresponds to a display brightness and grayscale, and according to the grayscale and gamma curve, the target data signal of the target pixel circuit corresponding to the area can be determined, so that the pixel circuit driving the display area to display works.

[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 at least compensate for 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 image, and determines a first compensation value of the display panel to be compensated according to 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 a second target image 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 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) through a second target screen of the display panel to be compensated, generates a brightness compensation map by using an algorithm according to the first compensation value and the second compensation value, compensates the display panel by using the two compensation values, improves the brightness uniformity of the display panel, and does not need to perform brightness compensation of the display panel by turning on a voltage attenuation compensation function (VDC ON). This can also avoid the problem of deterioration of brightness uniformity caused by turning off VDC, i.e., converting VDC ON to VDC OFF, when the brightness of the first frame of a low-brightness high-contrast (LHBM) screen shows obvious flickering. This solves the problem of uneven panel brightness when VDC is OFF in the related art.

[0122] In some examples, a 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 having the first compensation value stored in the Figure 1 and a compensation storing a second compensation value Figure 2 The LU-Demura off in Table 2 is the average brightness after the display panel to be compensated O is compensated by the prior art. It can be clearly seen that the average brightness after the display panel to be compensated is significantly improved by 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 comprises the following steps:

[0126] Step S701, 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 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] Step S703, using a processing device to determine the final compensation value of the display panel to be compensated according to the first compensation value and the second compensation value, and write 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, 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 of 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 according to the first compensation value and the second compensation value. The method tests the test panel to calculate the first compensation value (i.e., the offset compensation value), determines the second compensation value (i.e., the mura compensation value) by the second target screen of the display panel to be compensated, generates a brightness compensation map by using an algorithm according to the first compensation value and the second compensation value, and compensates the display panel by the two compensation values, thereby improving the brightness uniformity of the display panel and also improving the mura defect, and 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 VDC when the brightness of the first frame of the screen appears obvious flickering when entering the low brightness high contrast (LHBM) screen, that is, converting VDC ON to VDC OFF, which solves the problem of uneven panel brightness when VDC 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 compensation methods for the display panel. A brightness compensation graph is generated by using an algorithm according to 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 attenuation compensation function (VDC ON) to perform brightness compensation on the display panel, and it is also possible to avoid the problem of brightness uniformity deterioration caused by turning off VDC, that is, converting 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, which solves the problem of uneven panel brightness when VDC OFF in the related art.

[0132] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[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 image, and determines a first compensation value of the display panel to be compensated according to 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 a second target image 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 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) through a second target screen of the display panel to be compensated, generates a brightness compensation map by using an algorithm according to the first compensation value and the second compensation value, compensates the display panel by using the two compensation values, improves the brightness uniformity of the display panel, and does not need to perform brightness compensation of the display panel by turning on a voltage attenuation compensation function (VDC ON). This can also avoid the problem of deterioration of brightness uniformity caused by turning off VDC, i.e., converting VDC ON to VDC OFF, when the brightness of the first frame of a low-brightness high-contrast (LHBM) screen shows obvious flickering. This solves the problem of uneven panel brightness when VDC is OFF in the related art.

[0135] 2) The compensation method of the display panel of the present application first tests the brightness of each test panel to obtain the brightness values ​​of multiple test points on the test panel; then uses an image acquisition device to acquire images of 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 according to the first compensation value and the second compensation value. The method tests the test panel to calculate the first compensation value (i.e., the offset compensation value), determines the second compensation value (i.e., the mura compensation value) by the second target screen of the display panel to be compensated, generates a brightness compensation map by using an algorithm according to the first compensation value and the second compensation value, and compensates the display panel by the two compensation values ​​to improve the brightness uniformity of the display panel. It is not necessary to perform brightness compensation of the display panel by turning on the voltage attenuation compensation function (VDC ON), and it can also avoid the problem of deterioration of brightness uniformity caused by turning off VDC when the brightness of the first frame of the screen appears obvious flickering when entering the low brightness high contrast (LHBM) screen, that is, converting VDC ON to VDC OFF, which solves the problem of uneven panel brightness when VDC OFF in the related art.

[0136] 3) The display brightness of the display panel of the present application is determined by any of the compensation methods of the display panel. A brightness compensation diagram is generated by using an algorithm according to 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 attenuation compensation function (VDC ON) to perform brightness compensation on the display panel, and it can also be avoided that when entering a low brightness high contrast (LHBM) screen, when the brightness of the first frame of the screen shows obvious flickering, the VDC needs to be turned off, that is, VDC ON is converted to VDC OFF, resulting in the problem of deterioration of brightness uniformity, that is, the problem of uneven panel brightness when VDC OFF in the related art is solved.

[0137] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A compensation method for a display panel, characterized in that: include: Based on the first target images of the plurality of test panels, obtaining brightness values ​​respectively corresponding to m preset points on the plurality of test panels; Determine a first compensation value of the display panel to be compensated based on the brightness values ​​respectively corresponding to the m preset points of the plurality of test panels; Based on a second target picture of the display panel to be compensated, acquiring a plurality of image data of the display panel to be compensated; Determining a second compensation value of the display panel to be compensated based on the image data; Based on the first compensation value and the second compensation value, a final compensation value of the display panel to be compensated is determined, and the final compensation value is used to compensate the display panel to be compensated.

2. The compensation method according to claim 1, characterized in that: 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, wherein i≤m, and both i and m are positive integers greater than 0.

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

4. The compensation method according to claim 2, characterized in that: Determining a first compensation value of a display panel to be compensated based on the brightness values ​​respectively corresponding to the m preset points of the plurality of test panels includes: Based on the brightness values ​​respectively corresponding to the m preset points, determining the first sub-compensation value corresponding to each of the preset points; 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.

5. The compensation method according to claim 4, characterized in that: Determining the first sub-compensation value corresponding to each of the 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.

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

7. The compensation method according to claim 4, 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: Remove 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.

8. The compensation method according to claim 4, 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: The median of all the first sub-compensation values ​​is determined as the first sub-compensation value of the display panel to be compensated.

9. The compensation method according to claim 2, 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 value of the first preset test panel is different from that of the second preset test panel.

10. The compensation method according to claim 2, characterized in that: 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 an IC end close to the test panel to an end far from the IC end, or a rule that the plurality of preset points are arranged from an end far from the IC end to an end close to the IC end. and / or, The preset points on the test panel are arranged at equal intervals or at non-equal intervals.

11. The compensation method according to claim 1, characterized in that: 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, gray value, and contrast; The second compensation value is determined according to the mura value of the image data.

12. 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 at least compensate for the mura of the display panel to be compensated.

13. 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: Acquire 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 product of the first gain coefficient and the first compensation value as a third 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.

14. The compensation method according to claim 13, characterized in that: 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, and obtaining the first gain coefficient and the second gain coefficient includes: Based on the image of the display panel to be compensated, acquiring a target DBV value and a target grayscale of the display panel to be compensated; In a case where the target DBV value is the specific DBV value and the target grayscale is the specific grayscale corresponding to the specific DBV value, calling 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.

15. The compensation method according to claim 13, 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.

16. The compensation method according to claim 13, 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: Using the final compensation value to compensate the display panel to be compensated to obtain an initial compensation 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 size of the third compensation value and / or the size of the fourth compensation value are adjusted to perform secondary compensation on the initial compensation panel.

17. 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, including: 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.

18. The compensation method according to claim 16, 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.

19. The compensation method according to claim 18, 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.

20. The compensation method according to claim 18, 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 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; Determine a fifth compensation value by multiplying the first multiple by the third compensation value; Determine 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.

21. 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 a target display brightness and a 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 the 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.

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

23. 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 panels; Using an image acquisition device to acquire an image of the display panel to be compensated, so as to obtain image data of the display panel to be compensated; A processing device is used to determine a final compensation value of the display panel to be compensated according to a first compensation value and a 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, wherein the first compensation value is determined according to the brightness values ​​of all the test points, and the second compensation value is extracted from the image data.

24. A display panel, characterized in that: The display brightness of the display panel is determined by using the compensation method for the display panel described in any one of claims 1 to 23.

Images