Method and apparatus for establishing a brightness correction database for a display panel

Abstract

The application discloses a method and device for establishing a brightness correction database of a display panel, and a brightness correction method and device for the display panel. The method comprises the following steps: obtaining brightness defect data of a pixel unit with a brightness defect in a detection image of the display panel, and classifying the brightness defect of the pixel unit according to the brightness defect data; fitting the brightness of the pixel unit corresponding to different types of brightness defects at different gray scales to obtain a plurality of brightness-gray scale curves; and obtaining brightness correction data of the pixel unit corresponding to different types of brightness defects according to the plurality of brightness-gray scale curves to form the brightness correction database. The speed and accuracy of the brightness defect correction of the display panel are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a method and device for establishing a luminance correction database of a display panel, a method and device for correcting luminance of a display panel. BACKGROUND

[0002] At present, in the modern communication industry, the market demand for products such as mobile phones, televisions, tablets, notebooks and digital cameras is increasing, and various display devices are also developing towards high resolution. Therefore, the uniformity of the overall brightness of the display panel also faces some new requirements.

[0003] Among them, when the display panel is mass-produced, it is inevitable that some process defects will cause the display panel to have uneven brightness, forming various types of brightness defects; for example, bright spots or dark spots. To solve the technical problem of this brightness defect, the brightness correction method is usually used; however, in the actual production process, the brightness correction speed is slow and the accuracy is low. SUMMARY

[0004] The embodiments of the present application provide a method and device for establishing a luminance correction database of a display panel, a method and device for correcting the luminance of a display panel, which can improve the speed and accuracy of the display panel luminance defect correction, and improve the luminance uniformity of the display panel.

[0005] In one aspect, the embodiments of the present application provide a method for establishing a luminance correction database of a display panel, comprising: obtaining luminance defect data of a pixel unit with a luminance defect in a detection image of a display panel, and classifying the luminance defect of the pixel unit according to the luminance defect data; fitting the luminance of the pixel unit corresponding to different types of the luminance defect at different gray scales to obtain a plurality of luminance-gray scale curves; and obtaining luminance correction data of the pixel unit corresponding to different types of the luminance defect according to the plurality of luminance-gray scale curves, to form a luminance correction database.

[0006] Optionally, in some embodiments of the present application, the step of obtaining luminance defect data of a pixel unit with a luminance defect in a detection image of a display panel, and classifying the luminance defect of the pixel unit according to the luminance defect data, specifically comprises: obtaining the detection image of the display panel, and obtaining the luminance defect data of the pixel unit with the luminance defect according to the detection image, wherein the luminance defect data includes defect characteristic attribute parameters; and classifying the luminance defect of the pixel unit according to the defect characteristic attribute parameters.

[0007] Optionally, in some embodiments of the present application, the step of fitting the pixel units corresponding to different types of the brightness defects at different gray scales to obtain a plurality of brightness-gray scale curves, specifically comprises: obtaining the brightness information of the pixel units with brightness defects, recording the brightness information of the pixel units corresponding to the same type of the brightness defects respectively, and obtaining a plurality of brightness-gray scale curves according to the brightness information of the pixel units corresponding to different types of the brightness defects.

[0008] Optionally, in some embodiments of the present application, the step of obtaining the brightness correction data of the pixel units corresponding to different types of the brightness defects respectively according to the plurality of brightness-gray scale curves to form a brightness correction database, specifically comprises: obtaining the brightness correction data of the pixel units corresponding to different types of the brightness defects respectively, establishing the brightness correction relationship of the corresponding pixel units in different solid color pictures under the same gray scale for the same type of the brightness defects respectively, and obtaining the brightness correction data of the pixel units corresponding to different types of the brightness defects under different solid color pictures according to the brightness correction relationship.

[0009] Optionally, in some embodiments of the present application, the step of obtaining the brightness correction data of the pixel units corresponding to different types of the brightness defects respectively according to the plurality of brightness-gray scale curves to form a brightness correction database, specifically comprises: calculating the gray scale correction value corresponding to each gray scale in the full gray scale range for the pixel units corresponding to different types of the brightness defects respectively according to the plurality of brightness-gray scale curves; and forming the brightness correction database of the pixel units corresponding to different types of the brightness defects according to the gray scale correction value.

[0010] Optionally, in some embodiments of the present application, the defect characteristic attribute parameters include picture name, and / or area, and / or length, and / or width, and / or aspect ratio, and / or center gray scale, and / or contrast, and / or coordinates, and / or brightness.

[0011] Optionally, in some embodiments of the present application, it comprises: obtaining a display image of a display panel, identifying the brightness defect type of the pixel units with brightness defects in the display image; and performing brightness correction on the display image according to the brightness correction database obtained by the method for establishing a correction database of brightness of a display panel according to any one of claims 1-6.

[0012] Optionally, in some embodiments of the present application, the step of performing luminance correction on the display image according to the luminance correction database obtained by the method of establishing the luminance correction database of the display panel as described above specifically comprises: obtaining a display image corresponding to a binding point gray scale, and identifying the luminance defect type of the pixel unit corresponding to the display image; matching the luminance correction data corresponding to the luminance defect type in the full gray scale range in the luminance correction database according to the luminance defect type; and performing luminance correction on the display panel based on the luminance correction data in the full gray scale range.

[0013] Optionally, in some embodiments of the present application, the step of performing luminance correction on the display image according to the luminance correction database obtained by the method of establishing the luminance correction database of the display panel as described above specifically comprises: obtaining a display image corresponding to a binding point gray scale, and identifying the luminance defect type of the pixel unit corresponding to the display image; matching the luminance correction data corresponding to the binding point gray scale to the next binding point gray scale according to the luminance defect type in the luminance correction database; and performing luminance correction on the display panel according to the luminance correction data corresponding to at least two binding point gray scales.

[0014] The embodiments of the present application also provide a device for establishing a luminance correction database of a display panel, comprising: an obtaining module, a calculating module and a correction module, the obtaining module is configured to obtain luminance defect data of a pixel unit with luminance defects in a detection image of the display panel, and classify the luminance defects of the pixel unit according to the luminance defect data; the calculating module is configured to respectively fit the luminance of the pixel unit at different gray scales corresponding to different types of the luminance defects, and obtain a plurality of luminance-gray scale curves; and the correction module is configured to respectively obtain luminance correction data of the pixel unit corresponding to different types of the luminance defects according to the plurality of luminance-gray scale curves, and form a luminance correction database.

[0015] In another aspect, the embodiments of the present application also provide a device for correcting luminance of a display panel, comprising:

[0016] an obtaining module and a calculating correction module, the obtaining module is configured to obtain a display image of the display panel, and identify a luminance defect type of a pixel unit with luminance defects in the display image; and the calculating correction module is configured to perform luminance correction on the display image according to a luminance correction database obtained by the method of establishing the luminance correction database of the display panel as described above.

[0017] The embodiment of the present application provides a method for establishing a brightness correction database of a display panel, and a device for establishing the brightness correction database of the display panel, a brightness correction method of the display panel and a correction device, wherein the method for establishing the brightness correction database of the display panel comprises the following steps: obtaining brightness defect data of a pixel unit with a brightness defect in a detection image of the display panel, and classifying the brightness defect of the pixel unit according to the brightness defect data; fitting the brightness of the pixel unit in different gray scales corresponding to different types of the brightness defect respectively, to obtain a plurality of brightness-gray scale curves; and obtaining brightness correction data of the pixel unit corresponding to different types of the brightness defect respectively according to the plurality of brightness-gray scale curves, to form a brightness correction database. By classifying the brightness defect, the brightness correction database including the brightness defect types is established, the speed and accuracy of the brightness defect correction of the display panel can be improved, the brightness uniformity of the display panel is improved, and the display effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. The drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 The flowchart of the method for establishing the brightness correction database of the display panel provided by the embodiment of the present application is shown in the figure.

[0020] Figure 2 The sub-flowchart of step S10 in the method for establishing the brightness correction database of the display panel provided by the embodiment of the present application is shown in the figure.

[0021] Figure 3 The sub-flowchart of step S20 in the method for establishing the brightness correction database of the display panel provided by the embodiment of the present application is shown in the figure.

[0022] Figure 4 The sub-flowchart of step S20 in the method for establishing the brightness correction database of the display panel provided by the embodiment of the present application is shown in the figure.

[0023] Figure 5 The sub-flowchart of step S30 in the method for establishing the brightness correction database of the display panel provided by the embodiment of the present application is shown in the figure.

[0024] Figure 6 The flowchart of the brightness correction method of the display panel provided by the embodiment of the present application is shown in the figure.

[0025] Figure 7Figure 1 is a flowchart of a method for correcting the brightness of a display panel according to an embodiment of the present application.

[0026] Figure 8 Figure 2 is a flowchart of a method for correcting the brightness of a display panel according to another embodiment of the present application.

[0027] Figure 9 Figure 3 is a schematic diagram of an apparatus for establishing a brightness correction database of a display panel according to an embodiment of the present application.

[0028] Figure 10 Figure 4 is a schematic diagram of a first structure of a correction apparatus for a display panel according to an embodiment of the present application.

[0029] Figure 11 Figure 5 is a schematic diagram of a second structure of a correction apparatus for a display panel according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] The method for establishing a brightness correction database of a display panel, the apparatus for establishing a brightness correction database of a display panel, the method for correcting the brightness of a display panel, and the correction apparatus for a display panel according to the embodiments of the present application can improve the speed and accuracy of the correction of the brightness defects of a display panel, and improve the brightness uniformity of a display panel. It should be noted that the sequence of the following embodiments is not intended to limit the preferred sequence of the embodiments. In addition, in the description of the present application, the term "comprises" means "comprises but is not limited to". The terms "first", "second", "third", etc. are used only as labels, and are used to distinguish different objects, but are not used to describe a specific sequence.

[0032] Referring to Figure 1 , Figure 1 Figure 1 is a flowchart of a method for correcting the brightness of a display panel according to an embodiment of the present application. Figure 1 As shown in Figure 1, the method for correcting the brightness of a display panel according to an embodiment of the present application comprises the following steps:

[0033] S10, obtaining the brightness defect data of the pixel units with brightness defects in the detection image of the display panel, and classifying the brightness defects of the pixel units according to the brightness defect data.

[0034] In some embodiments, referring to Figure 2, Figure 2 The sub-flowchart diagram of step S10 in the method for establishing the brightness correction database of the display panel provided in the embodiments of the present application is shown in FIG. 10. Figure 2 As shown in the figure, the step S10 specifically includes the following sub-steps:

[0035] S101, acquiring a detection image of the display panel, and acquiring brightness defect data of the pixel unit with the brightness defect according to the detection image, wherein the brightness defect data includes a defect characteristic attribute parameter.

[0036] In the embodiments of the present application, the defect characteristic attribute parameter includes a picture name, and / or an area, and / or a length, and / or a width, and / or an aspect ratio, and / or a center gray scale, and / or a contrast, and / or a coordinate, and / or a brightness.

[0037] In the embodiments of the present application, the brightness defect data further includes a defect characteristic attribute gradient parameter, which includes a characteristic attribute gradient range of the defect type and a gradient coefficient factor corresponding to the characteristic attribute gradient range. The defect characteristic attribute parameter is substituted into the characteristic attribute gradient range respectively to obtain a gradient coefficient factor vector.

[0038] S102, classifying the brightness defect of the pixel unit according to the defect characteristic attribute parameter.

[0039] S20, fitting the brightness of the pixel unit of different types of brightness defects at different gray scales respectively to obtain a plurality of brightness-gray scale curves.

[0040] In some embodiments, please refer to Figure 3 , Figure 3 The sub-flowchart diagram of step S20 in the method for establishing the brightness correction database of the display panel provided in the embodiments of the present application is shown in FIG. 11. Figure 3 As shown in the figure, the step S20 specifically includes the following sub-steps:

[0041] S210, acquiring the brightness information of the pixel unit with the brightness defect at different gray scales, and recording the brightness information of the pixel unit corresponding to the same type of brightness defect respectively.

[0042] Specifically, the brightness of the pixel unit corresponding to each gray scale in the full gray scale range is acquired respectively for the pixel unit corresponding to the same type of brightness defect.

[0043] S211, obtaining a plurality of brightness-gray scale curves according to the brightness information of the pixel unit corresponding to different types of brightness defects.

[0044] As one specific implementation of the present application, please refer to Figure 4 ,Figure 4 FIG. 2 is a flowchart illustrating a method for establishing a luminance correction database of a display panel according to an embodiment of the present disclosure. As shown in FIG. 2, the method includes the following steps: Figure 4 The step S20 specifically includes the following sub-steps:

[0045] S220, respectively acquiring the luminance correction data of the pixel units corresponding to different types of luminance defects, and respectively establishing the luminance correction relationship of the pixel units corresponding to the same type of luminance defect in different pure color pictures at the same gray level.

[0046] Specifically, since the luminance defects behave differently in different color channels, the luminance correction relationship between the luminance defects in different pure color pictures can be established, for example, the relationship between the luminance correction value in the green picture and the luminance correction value in the red picture and the blue picture is established, the effect of monochromatic photographing compensation for color mixing is realized, and the adjustment time of the color uniformity of the panel is reduced.

[0047] S221, obtaining the luminance correction data of the pixel units corresponding to different types of luminance defects in different pure color pictures according to the luminance correction relationship.

[0048] Further, through the luminance correction relationship of the same type of luminance defect at the same gray level in different pure color pictures, the luminance correction data of the pixel units corresponding to different types of luminance defects in different pure color pictures at each gray level in the full gray level range is formed. For example, the luminance correction data of the pixel units corresponding to the A defect in the red picture, the green picture and the blue picture is acquired, and according to the three luminance correction data acquired, the luminance correction data of the luminance defect corresponding to the detection picture is calculated according to the color mixing proportion relationship between the color of the detection picture and the red picture, the green picture and the blue picture. For example, if the detection picture is a purple picture, the luminance correction data of the luminance defect corresponding to the purple picture is calculated according to the color mixing proportion relationship between the purple picture and the red picture, the green picture and the blue picture.

[0049] S30, respectively obtaining the luminance correction data of the pixel units corresponding to different types of luminance defects according to a plurality of luminance-gray level curves, and forming a luminance correction database.

[0050] In some embodiments, please refer to Figure 5 , Figure 5 FIG. 3 is a flowchart illustrating a sub-process of step S30 of the method for establishing a luminance correction database of a display panel according to an embodiment of the present disclosure. As shown in FIG. 3, the step S30 specifically includes the following sub-steps: Figure 5

[0051] ​S301, respectively calculate the gray scale correction values corresponding to each gray scale in the full gray scale range of the pixel unit corresponding to different types of luminance defects according to the plurality of luminance-gray scale curves.

[0052] S302, form a luminance correction database of the pixel unit corresponding to different types of luminance defects according to the gray scale correction values.

[0053] On the other hand, the present application also provides a luminance correction method of a display panel, please refer to Figure 6 , Figure 6 The flowchart of the luminance correction method of the display panel provided by the embodiment of the present application. As shown in Figure 6 The luminance correction method of the display panel includes the following steps:

[0054] S40, obtaining a display image of the display panel, and identifying the luminance defect type of the pixel unit with luminance defects in the display image.

[0055] Please refer to Figure 7 , Figure 7 One of the sub-flowcharts of the step S40 of the luminance correction method of the display panel provided by the embodiment of the present application. As shown in Figure 7 The specific process includes:

[0056] S410, obtaining a display image corresponding to the binding point gray scale, and identifying the luminance defect type of the pixel unit corresponding to the display image.

[0057] Based on the neural network of the luminance correction database, the accurate luminance correction of a single binding point can be realized, which is conducive to improving the correction accuracy while reducing the time required for correction.

[0058] S411, matching the luminance correction data in the full gray scale range corresponding to the luminance defect type in the luminance correction database.

[0059] S412, based on the luminance correction data in the full gray scale range, performing luminance correction on the display panel to compress the luminance correction time to the greatest extent and improve the production efficiency.

[0060] Specifically, after the step of performing luminance correction on the display panel based on the luminance correction data in the full gray scale range, a burning step and a photographing step are further included, wherein the burning is to burn the luminance correction data of the binding point gray scale into the luminance correction database. The photographing step is to take a picture of the display image with correction information and determine the grade of the display panel. When the luminance defects in the corrected display image are eliminated, the luminance correction process is ended.

[0061] As one specific embodiment of the present application, please refer to Figure 8 , Figure 8As shown in FIG. 2, the specific process includes the following steps. Figure 8

[0062] S420, obtaining a display image corresponding to the binding point gray scale, and identifying the brightness defect type of the pixel unit corresponding to the display image.

[0063] Specifically, in some embodiments, at least two binding point gray scales are selected by taking a picture, and at least one set of display images corresponding to the binding point gray scales is obtained. Specifically, the selected binding point gray scales are 25 gray scales, 60 gray scales, and 128 gray scales.

[0064] S421, according to the brightness correction database, matching the binding point gray scale corresponding to the brightness defect type to the brightness correction data corresponding to the next binding point gray scale.

[0065] Specifically, the display image of 60 gray scales is obtained by taking a picture, and the brightness defect of the pixel unit in the display image is matched with the stored brightness defect type.

[0066] S422, according to the brightness correction data corresponding to at least two binding point gray scales, performing brightness correction on the display panel to compress the brightness correction time to the greatest extent and improve the production efficiency.

[0067] Specifically, according to the corresponding brightness correction data matched by the brightness defect type, the brightness correction data between at least two binding point gray scales is called, for example, the brightness correction data from 60 to 128 gray scales corresponding to the category of brightness defect. This method can reduce the calculation time of interpolation, and since the brightness correction data of the brightness defect is the correction data of each gray scale measured by the above steps, the compensation obtained by the traditional linear interpolation is more accurate, and the brightness correction time is compressed to the greatest extent, and the production efficiency is improved.

[0068] S50, according to the brightness correction database obtained by the method of establishing the brightness correction database of the display panel, performing brightness correction on the display image.

[0069] Further, after the step of performing brightness correction on the display panel according to the brightness correction data corresponding to at least two binding point gray scales, a burning step and a photographing judgment step are further included, wherein the burning is burning the brightness correction data of the binding point gray scale into the brightness correction database. The photographing judgment is taking a picture of the display image with correction information, and judging the grade of the display panel. When the brightness defect in the corrected display image is eliminated, the brightness correction process is ended.

[0070] ​The display image of the display panel is obtained, and the display image can be obtained as follows:

[0071] (1) Erasing the image residual of the display panel to make the display panel in an initial state.

[0072] The display panel has image residual. Therefore, if the display image of the display panel is directly obtained, the brightness of the obtained display image will have errors compared with the actual brightness, thereby affecting the accuracy of the brightness correction of the display panel. Therefore, before obtaining the display image of the display panel, an erasing operation is needed to erase the image residual of the display panel, so that the display panel is in an initial state, and the image residual of the display panel does not affect the accuracy of the subsequent brightness correction of the display panel.

[0073] (2) Delivering a white picture to the display panel.

[0074] The embodiment of the present application corrects the brightness of the display panel, and does not correct the color. Therefore, only the gray scale picture needs to be detected. Therefore, a white picture with a fixed gray scale is delivered to the display panel, and the brightness of the white picture is measured. The fixed gray scale can be one of 0 gray scale, 24 gray scale, 32 gray scale, 64 gray scale, 96 gray scale, 128 gray scale, 225 gray scale and 255 gray scale.

[0075] (3) Obtaining the brightness data of the display image of the display panel when displaying the white picture.

[0076] The brightness information of the pixel unit corresponding to the display image is obtained, and the display area of the display panel is divided to calculate the brightness of the pixel unit in the center area and the brightness of the pixel unit in other areas, which can be as follows:

[0077] The center point of the center area is obtained, and a plurality of other sub-areas are divided around the center area, and the center point of the other sub-area is obtained.

[0078] It should be noted that the center point of the center area is the geometric center of the center area, that is, the intersection point of the two diagonal lines of the center area. The center point of the other sub-area is the geometric center of the other sub-area, that is, the intersection point of the two diagonal lines of the other sub-area. The brightness of the display image can be obtained by a color analyzer. Specifically, CA310 or CA410 can be used to obtain the brightness of the display image. The probe of CA310 or CA410 is directed to the center point of the center area or the other sub-area, and is perpendicular to the center area or the other sub-area, so as to measure the brightness of the center point of the center area or the other sub-area.

[0079] The method for correcting the brightness of the display panel provided in the application can improve the speed and accuracy of the correction of the brightness defects of the display panel, improve the brightness uniformity of the display panel, and thus improve the display effect.

[0080] Please refer to Figure 9 , Figure 9 is a device structure schematic diagram for establishing the brightness correction database of the display panel provided in the embodiments of the application. As shown in Figure 9 , the embodiments of the application further provide a device 400 for establishing the brightness correction database of the display panel, which comprises an acquisition module 410, a calculation module 420 and a correction module 430, and specifically as follows:

[0081] The acquisition module 410 is configured to acquire the brightness defect data of the pixel units with the brightness defects in the detection image of the display panel, and classify the brightness defects of the pixel units according to the brightness defect data.

[0082] The calculation module 420 is configured to respectively fit the brightness of the pixel units corresponding to different types of brightness defects at different gray scales to obtain a plurality of brightness-gray scale curves.

[0083] The correction module 430 is configured to respectively obtain the brightness correction data of the pixel units corresponding to different types of brightness defects according to the plurality of brightness-gray scale curves to form the brightness correction database.

[0084] Please refer to Figure 10 , Figure 10 is a first structure schematic diagram of the correction device of the display panel provided in the embodiments of the application. As shown in Figure 10 , the embodiments of the application further provide a correction device 500 for the brightness of the display panel, which comprises an acquisition module 510 and a calculation and correction module 520, and specifically as follows:

[0085] The acquisition module 510 is configured to acquire the display image of the display panel, and identify the brightness defect type of the pixel units with the brightness defects in the display image.

[0086] The calculation and correction module 520 is configured to perform brightness correction on the display image according to the brightness correction database obtained by the method for establishing the brightness correction database of the display panel.

[0087] Please refer to Figure 11 , Figure 11is a second structural schematic diagram of a correction device of a display panel provided by an embodiment of the present application. Figure 11 The correction device 600 shown is different from the correction device 500 shown in that the correction device 600 comprises an acquisition module 610, a calculation correction module 620, and a defect level determination module 630, and the defect level determination module 630 is configured to determine the level of the display panel according to the identified number and type of luminance defects. Figure 10 The correction device 600 shown is different from the correction device 500 shown in that the correction device 600 comprises an acquisition module 610, a calculation correction module 620, and a defect level determination module 630, and the defect level determination module 630 is configured to determine the level of the display panel according to the identified number and type of luminance defects.

[0088] The present application provides a method for establishing a luminance correction database of a display panel, a device for establishing a luminance correction database of a display panel, a correction method and a correction device for luminance of a display panel. The method comprises: acquiring luminance defect data of a pixel unit of a detection image of a display panel having a luminance defect, and classifying the luminance defect of the pixel unit according to the luminance defect data; fitting the luminance of the pixel unit of different types of luminance defects at different gray scales to obtain a plurality of luminance-gray scale curves; and obtaining luminance correction data of the pixel unit corresponding to different types of luminance defects according to the plurality of luminance-gray scale curves to form a luminance correction database. By classifying the luminance defects, a luminance correction database corresponding to different types of luminance defects is established, which can improve the speed and accuracy of the luminance defect correction of the display panel, improve the luminance uniformity of the display panel, and thus improve the display effect.

[0089] The above describes in detail a method for establishing a luminance correction database of a display panel, a device for establishing a luminance correction database of a display panel, a correction method and a correction device for luminance of a display panel provided by an embodiment of the present application. The principles and implementation manners of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method and its core idea of the present application. Meanwhile, according to the idea of the present application, the specific implementation manners and application ranges will be changed by those skilled in the art. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A method for establishing a brightness calibration database for a display panel, characterized in that, include: Acquire brightness defect data of pixel units with brightness defects in the detected image of the display panel, and classify the brightness defects of the pixel units according to the brightness defect data; The brightness of the pixel units corresponding to different types of brightness defects is fitted in multiple different gray levels across the full gray level range to obtain multiple brightness-gray level curves; Based on the multiple brightness-grayscale curves, the grayscale correction values ​​of the pixel units corresponding to different types of brightness defects in the full grayscale range are obtained, forming a brightness correction database.

2. The method for establishing a brightness calibration database for a display panel according to claim 1, characterized in that, The step of acquiring brightness defect data of pixel units with brightness defects in the detected image of the display panel, and classifying the brightness defects of the pixel units based on the brightness defect data, specifically includes: Obtain a detection image of the display panel, and obtain brightness defect data of the pixel unit with brightness defect based on the detection image, wherein the brightness defect data includes defect feature attribute parameters; The brightness defects of the pixel unit are classified according to the defect feature attribute parameters.

3. The method for establishing a brightness calibration database for a display panel according to claim 1, characterized in that, The step of fitting the brightness of the pixel units corresponding to different types of brightness defects at multiple different gray levels across the full grayscale range to obtain multiple brightness-grayscale curves specifically includes: The brightness information of the pixel unit with brightness defects at different gray levels is obtained, and the brightness information of the pixel unit corresponding to the same type of brightness defect is recorded respectively. Based on the brightness information of the pixel unit corresponding to different types of brightness defects, multiple brightness-gray level curves are obtained.

4. The method for establishing a brightness calibration database for a display panel according to claim 1, characterized in that, The step of obtaining grayscale correction values ​​for each grayscale level of the pixel unit corresponding to different types of brightness defects in the full grayscale range based on multiple brightness-grayscale curves, and forming a brightness correction database, specifically includes: Brightness correction data of pixel units corresponding to different types of brightness defects are obtained respectively. Brightness correction relationships of pixel units corresponding to the same type of brightness defect in different solid color images under the same gray level are established respectively. Brightness correction data of pixel units corresponding to different types of brightness defects in different solid color images are obtained according to the brightness correction relationships.

5. The method for establishing a brightness calibration database for a display panel according to claim 1, characterized in that, The step of obtaining grayscale correction values ​​for each grayscale level of the pixel unit corresponding to different types of brightness defects in the full grayscale range based on multiple brightness-grayscale curves, and forming a brightness correction database, specifically includes: Based on the multiple brightness-grayscale curves, calculate the grayscale correction values ​​for each grayscale level of the pixel unit corresponding to different types of brightness defects in the full grayscale range. Based on the grayscale correction values, a brightness correction database is formed for the pixel units corresponding to different types of brightness defects.

6. The method for establishing a brightness calibration database for a display panel according to claim 2, characterized in that, The defect feature attribute parameters include image name, and / or area, and / or length, and / or width, and / or aspect ratio, and / or center grayscale, and / or contrast, and / or coordinates, and / or brightness.

7. A brightness calibration method for a display panel, characterized in that, include: Acquire a display image of the display panel and identify the brightness defect type of the pixel unit with brightness defect in the display image; The brightness of the display image is corrected according to the brightness correction database obtained by the method for establishing a brightness correction database of the display panel as described in any one of claims 1-6.

8. The brightness correction method for a display panel according to claim 7, characterized in that, The step of performing brightness correction on the display image using the brightness correction database obtained by the method for establishing a brightness correction database for a display panel as described in any one of claims 1-6 specifically includes: Obtain the display image corresponding to the grayscale of the bound points, and identify the brightness defect type of the pixel unit corresponding to the display image; Match the brightness correction data within the full grayscale range in the brightness correction database according to the brightness defect type; The brightness of the display panel is calibrated based on the brightness calibration data across the entire grayscale range.

9. The brightness correction method for a display panel according to claim 7, characterized in that, The step of performing brightness correction on the display image using the brightness correction database obtained by the method for establishing a brightness correction database for a display panel as described in any one of claims 1-6 specifically includes: Obtain the display image corresponding to the grayscale of the bound points, and identify the brightness defect type of the pixel unit corresponding to the display image; According to the brightness correction database, match the grayscale of the binding point corresponding to the brightness defect type to the brightness correction data corresponding to the next grayscale of the binding point; The display panel is brightness calibrated based on the brightness correction data interpolated between at least two of the binding point grayscale values.

10. An apparatus for establishing a brightness calibration database for a display panel, characterized in that, include: The acquisition module is used to acquire brightness defect data of pixel units with brightness defects in the detection image of the display panel, and classify the brightness defects of the pixel units according to the brightness defect data. The calculation module is used to fit the brightness of the pixel unit corresponding to different types of brightness defects in multiple different gray levels within the full gray level range, and obtain multiple brightness-gray level curves. The correction module is used to obtain the grayscale correction values ​​of the pixel units corresponding to different types of brightness defects in the full grayscale range according to the multiple brightness-grayscale curves, and form a brightness correction database.

11. A device for correcting the brightness of a display panel, characterized in that, include: The acquisition module is used to acquire the display image of the display panel and identify the brightness defect type of the pixel unit with brightness defect in the display image; A calculation correction module is used to perform brightness correction on the display image according to a brightness correction database obtained by the method for establishing a brightness correction database of the display panel as described in any one of claims 1-6.

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