Brightness correction method and device of display panel, and display device

Abstract

The application discloses a display panel brightness correction method and device, and a display device. A display area of the display panel comprises a center display area, a transition display area and an edge display area. The edge display area is located on a side of the transition display area away from the center display area. The display panel brightness correction method comprises the following steps: driving the display panel to display a first picture in the center display area, the transition display area and the edge display area; acquiring first gray scale data of a plurality of pixels located in the transition display area and second gray scale data of a plurality of pixels located in the edge display area in the first picture; driving the display panel to display a second picture in the center display area and the transition display area; acquiring third gray scale data of the plurality of pixels located in the transition display area in the second picture; calculating a brightness correction coefficient set according to the first gray scale data and the third gray scale data; and calculating target gray scale data of the plurality of pixels located in the edge display area in the first picture according to the brightness correction coefficient set and the second gray scale data.

Description

TECHNICAL FIELD

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

[0002] The existing display panel has the problem of display unevenness (Mura) in the peripheral display area due to process, film thickness and other factors. The problem of display unevenness in the peripheral display area generally needs to be solved by external compensation technology, which is usually called DeMura. In the DeMura process, there is a phenomenon of virtual focus when the shooting device shoots an image, so there is a distortion phenomenon in the edge area of the shot image.

[0003] In the prior art, edge filling and trend prediction methods are used to improve the problem of display unevenness in the peripheral display area. However, the existing technology for improving the problem of display unevenness in the peripheral display area of the display panel cannot ensure that the brightness of the pixels located in the peripheral display area of the display panel can be accurately adjusted to the target brightness, so as to solve the problem of display unevenness in the peripheral display area of the display panel. SUMMARY

[0004] Embodiments of the present application provide a display panel brightness correction method and device, and a display device, aiming to improve the problem of display unevenness in the peripheral display area of the display panel.

[0005] In one aspect, the embodiments of the present application provide a display panel brightness correction method, the display panel comprising a plurality of pixels arranged in an array, the display panel having a display area, the display area comprising a center display area, a transition display area and an edge display area, the transition display area being located on one side of the center display area, the edge display area being located on a side of the transition display area away from the center display area, the display panel brightness correction method comprising: driving the display panel to display a first picture in the center display area, the transition display area and the edge display area; obtaining first gray scale data of a plurality of pixels located in the transition display area and second gray scale data of a plurality of pixels located in the edge display area in the first picture; driving the display panel to display a second picture in the center display area and the transition display area; obtaining third gray scale data of a plurality of pixels located in the transition display area in the second picture; calculating a set of brightness correction coefficients according to the first gray scale data and the third gray scale data; and calculating target gray scale data of a plurality of pixels located in the edge display area in the first picture according to the set of brightness correction coefficients and the second gray scale data.

[0006] Optionally, in some embodiments of the present application, the transition display area is provided with M pixel columns, the edge display area is provided with N pixel columns, and a plurality of the pixel columns are arranged from the center display area to the edge display area, any of the pixel columns includes K pixels, M, N and K are positive integers greater than or equal to 1, and M is greater than or equal to N.

[0007] Optionally, in some embodiments of the present application, the brightness correction method of the display panel further includes: obtaining the brightness correction coefficient corresponding to each of the pixels located in the edge display area in the first picture according to the set of brightness correction coefficients.

[0008] Optionally, in some embodiments of the present application, the brightness correction coefficient of the kth pixel in the nth pixel column located in the edge display area is equal to the brightness correction coefficient of the kth pixel in the nth pixel column located in the transition display area, wherein the nth pixel column is the nth pixel column in the direction from the edge display area to the center display area, n and k are positive integers greater than or equal to 1, n is less than or equal to N, and k is less than or equal to K.

[0009] Optionally, in some embodiments of the present application, the set of brightness correction coefficients includes a plurality of brightness correction coefficients, and the number of the brightness correction coefficients is equal to the number of the pixels located in the transition display area.

[0010] Optionally, in some embodiments of the present application, the first gray scale data includes a plurality of first gray scale values, the third gray scale data includes a plurality of third gray scale values, the set of brightness correction coefficients includes a plurality of brightness correction coefficients, and the step of calculating the set of brightness correction coefficients according to the first gray scale data and the third gray scale data includes: calculating the brightness correction coefficient of each of the pixels according to the ratio of the first gray scale value to the third gray scale value of each of the pixels.

[0011] Optionally, in some embodiments of the present application, the second gray scale data includes a plurality of second gray scale values, and the step of calculating the target gray scale data of each of the pixels located in the edge display area in the first picture according to the set of brightness correction coefficients and the second gray scale data includes: calculating the target gray scale value of each of the pixels according to the product of the brightness correction coefficient and the second gray scale value of each of the pixels.

[0012] Optionally, in some embodiments of the present application, the brightness correction method of the display panel further includes: storing the set of brightness correction coefficients to a preset storage space of the display panel.

[0013] The application further provides a brightness correction device of a display panel, comprising a driving module, an acquisition module and a calculation module, the driving module is used for driving the display panel to display a first picture in the center display area, the transition display area and the edge display area, and is used for driving the display panel to display a second picture in the center display area and the transition display area; the acquisition module is used for acquiring first gray scale data of a plurality of pixels in the transition display area and second gray scale data of a plurality of pixels in the edge display area in the first picture, and is used for acquiring third gray scale data of a plurality of pixels in the transition display area in the second picture; the calculation module is used for calculating a set of brightness correction coefficients according to the first gray scale data and the third gray scale data, and is used for calculating target gray scale data of a plurality of the pixels in the edge display area in the first picture according to the set of brightness correction coefficients and the second gray scale data.

[0014] In another aspect, the application provides a display device, comprising a display panel and a driving circuit, the driving circuit is electrically connected with the display panel, wherein the display panel comprises a plurality of pixels arranged in an array, the display panel has a display area, the display area comprises a center display area, a transition display area and an edge display area, the transition display area is located on one side of the center display area, and the edge display area is located on a side of the transition display area away from the center display area; the driving circuit comprises a storage unit and a compensation unit, the storage unit is used for storing a set of brightness correction coefficients acquired according to the brightness correction method of the display panel; the compensation unit is used for compensating display gray scale of a plurality of the pixels in the edge display area of the display panel according to the set of brightness correction coefficients.

[0015] The display panel brightness correction method and device and display device provided by the present application drive the display panel to display a first picture in the center display area, the transition display area and the edge display area; acquire first gray scale data of a plurality of pixels in the transition display area and second gray scale data of a plurality of pixels in the edge display area in the first picture; drive the display panel to display a second picture in the center display area and the transition display area; acquire third gray scale data of a plurality of pixels in the transition display area in the second picture; calculate a brightness correction coefficient set according to the first gray scale data and the third gray scale data; and calculate target gray scale data of a plurality of pixels in the edge display area in the first picture according to the brightness correction coefficient set and the second gray scale data, that is, calculate the brightness correction coefficient set of the pixels according to the first gray scale data of a plurality of pixels in the transition display area in the first picture (i.e. the gray scale data of the pixels when no peripheral Mura problem occurs) and the third gray scale data of a plurality of pixels in the transition display area in the second picture (i.e. the gray scale data of the pixels when the peripheral Mura problem occurs), so as to calculate the target gray scale data of a plurality of pixels in the edge display area in the first picture according to the brightness correction coefficient set and the second gray scale data, thereby improving the display unevenness problem of the peripheral display area of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a schematic diagram of a display panel according to the present application;

[0017] Figure 2 FIG. 2 is a schematic diagram of a display panel according to the present application;

[0018] Figure 3 FIG. 3 is a flowchart of a display panel brightness correction method according to the present application;

[0019] Figure 4 FIG. 4 is a schematic diagram of a display device according to the present application;

[0020] Figure 5 FIG. 5 is a comparison diagram of an image of an edge area of a picture displayed by a display panel before brightness correction and an image of an edge area of a picture taken during the brightness correction process of the display panel;

[0021] Figure 6 FIG. 6 is a comparison diagram of a gray scale of an edge area of a picture displayed by a display panel before brightness correction and a gray scale of an edge area of a picture taken during the brightness correction process of the display panel. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. The described technical solutions are only used to explain and describe the ideas of the present application, and should not be regarded as a limitation on the protection scope of the present application.

[0023] The various embodiments provided by the present application are similar, and the features in different embodiments can be combined with each other.

[0024] As shown in the drawings, Figure 1 The embodiments of the present application provide a brightness correction device 100 of a display panel, comprising a driving module 110, an acquisition module 120 and a calculation module 130.

[0025] In the embodiments of the present application, the driving module 110 is configured to drive the display panel to display a first picture in the center display area, the transition display area and the edge display area, and to drive the display panel to display a second picture in the center display area and the transition display area.

[0026] In the embodiments of the present application, the acquisition module 120 is configured to acquire first gray scale data of a plurality of pixels located in the transition display area and second gray scale data of a plurality of pixels located in the edge display area in the first picture, and to acquire third gray scale data of a plurality of pixels located in the transition display area in the second picture.

[0027] In the embodiments of the present application, the calculation module 130 is configured to calculate a set of brightness correction coefficients according to the first gray scale data and the third gray scale data, and to calculate target gray scale data of the plurality of pixels located in the edge display area in the first picture according to the set of brightness correction coefficients and the second gray scale data.

[0028] The brightness correction device for the display panel provided in this application drives the display panel to display a first image in a central display area, a transition display area, and an edge display area; acquires first grayscale data of multiple pixels located in the transition display area and second grayscale data of multiple pixels located in the edge display area in the first image; drives the display panel to display a second image in the central display area and the transition display area; acquires third grayscale data of multiple pixels located in the transition display area in the second image; calculates a brightness correction coefficient set based on the first grayscale data and the third grayscale data; calculates target grayscale data of multiple pixels located in the edge display area in the first image based on the brightness correction coefficient set and the second grayscale data, that is, calculates the brightness correction coefficient set of pixels based on the first grayscale data of multiple pixels located in the transition display area in the first image (i.e., the grayscale data of pixels when there is no peripheral Mura problem) and the third grayscale data of multiple pixels located in the transition display area in the second image (i.e., the grayscale data of pixels when there is a peripheral Mura problem) and the second grayscale data, thereby calculating the target grayscale data of multiple pixels located in the edge display area in the first image based on the brightness correction coefficient set and the second grayscale data, thereby improving the problem of uneven display in the peripheral display area of ​​the display panel.

[0029] like Figure 2 As shown in the embodiments of this application, the display panel 210 includes a plurality of pixels 10 arranged in an array. The display panel 210 has a display area AA, which includes a central display area AA1, a transition display area AA2, and an edge display area AA3. The transition display area AA2 is located on one side of the central display area, and the edge display area AA3 is located on the side of the transition display area away from the central display area.

[0030] In the embodiments of this application, the display area AA includes four transition display areas AA2 and four edge display areas AA3. The four transition display areas AA2 are respectively located on the four sides of the central display area AA1, and the four edge display areas AA3 are respectively located on the side of the four transition display areas AA2 away from the central display area AA1. That is, the transition display areas AA2 and the edge display areas AA3 are arranged in a one-to-one correspondence.

[0031] like Figure 3 As shown, an embodiment of this application provides a brightness correction method for a display panel as described above, comprising:

[0032] S10. Drive the display panel to display the first image in the center display area, the transition display area and the edge display area.

[0033] In the embodiments of this application, pixels located in the central display area, the transition display area, and the edge display area are all lit up to display the first screen.

[0034] S20, acquire first gray scale data of the plurality of pixels located in the transition display area and second gray scale data of the plurality of pixels located in the edge display area in the first picture displayed by the display panel.

[0035] In the embodiment of the present application, the first gray scale data of the plurality of pixels located in the transition display area and the second gray scale data of the plurality of pixels located in the edge display area in the first picture displayed by the display panel at a preset gray scale are acquired. The preset gray scale is between 1 gray scale and 255 gray scale. That is, the preset gray scale is greater than 0 gray scale.

[0036] In the embodiment of the present application, the preset gray scale includes a first preset gray scale, a second preset gray scale and a third preset gray scale. The first preset gray scale is between 1 gray scale and 60 gray scale, and the first preset gray scale includes 1 gray scale, 5 gray scale, 10 gray scale, 15 gray scale, 20 gray scale, 25 gray scale, 30 gray scale, 35 gray scale, 40 gray scale, 45 gray scale, 50 gray scale, 55 gray scale and 60 gray scale. The second preset gray scale is between 61 gray scale and 120 gray scale, and the second preset gray scale includes 61 gray scale, 65 gray scale, 70 gray scale, 75 gray scale, 80 gray scale, 85 gray scale, 90 gray scale, 95 gray scale, 100 gray scale, 105 gray scale, 110 gray scale, 115 gray scale and 120 gray scale. The third preset gray scale is between 121 gray scale and 255 gray scale, and the third preset gray scale includes 121 gray scale, 125 gray scale, 130 gray scale, 135 gray scale, 140 gray scale, 145 gray scale, 150 gray scale, 155 gray scale, 160 gray scale, 165 gray scale, 170 gray scale, 175 gray scale, 180 gray scale, 185 gray scale, 190 gray scale, 195 gray scale, 200 gray scale, 205 gray scale, 210 gray scale, 215 gray scale, 220 gray scale, 225 gray scale, 230 gray scale, 235 gray scale, 240 gray scale, 245 gray scale, 250 gray scale and 255 gray scale.

[0037] In the embodiment of the present application, the first gray scale data of the plurality of pixels located in the transition display area and the second gray scale data of the plurality of pixels located in the edge display area in the first picture displayed by the display panel at 45 gray scale are acquired. The first gray scale data of the plurality of pixels located in the transition display area and the second gray scale data of the plurality of pixels located in the edge display area in the first picture displayed by the display panel at 90 gray scale are acquired. The first gray scale data of the plurality of pixels located in the transition display area and the second gray scale data of the plurality of pixels located in the edge display area in the first picture displayed by the display panel at 185 gray scale are acquired.

[0038] In the embodiments of the present application, the first gray scale data includes a plurality of first gray scale values, and the number of the first gray scale values is equal to the number of the pixels located in the transition display area.

[0039] S30, driving the display panel to display the second picture in the center display area and the transition display area.

[0040] In the embodiments of the present application, the preset condition includes that the gray scale values of the pixels located in the edge display area are all set to 0, and the initial gray scale data of the pixels located in the center display area and the transition display area are equal to the initial gray scale data of the pixels located in the center display area and the transition display area in the first picture and are not 0. That is, no driving voltage is provided to the pixels located in the edge display area, or the display gray scale values of the pixels located in the edge display area are controlled to be 0, so that the edge display area in the first picture is black.

[0041] At the same time, the driving voltage is provided to the pixels located in the center display area and the transition display area, so that the center display area and the transition display area in the second picture are not black. Specifically, the driving voltage provided to the pixels located in the center display area and the transition display area is equal to the driving voltage provided to the pixels located in the center display area and the transition display area in the first picture, so that the fourth gray scale data of the pixels located in the center display area in the first picture is equal to the fifth gray scale data of the pixels located in the center display area in the second picture. The fourth gray scale data includes a plurality of fourth gray scale values, the fifth gray scale data includes a plurality of fifth gray scale values, and the fourth gray scale value of any pixel located in the center display area is equal to the fifth gray scale value of the pixel.

[0042] S40, obtaining third gray scale data of the pixels located in the transition display area in the second picture.

[0043] In the embodiments of the present application, the third gray scale data includes a plurality of third gray scale values, and the number of the third gray scale values is equal to the number of the pixels located in the transition display area. Since the display gray scale data of the pixels located in the edge display area in the second picture is 0, that is, the edge display area is black, the transition display area in the second picture is equivalent to the edge display area in the first picture, that is, there is a phenomenon of virtual focus when the image is captured by using the photographing device, so that the phenomenon of uneven display of the periphery occurs in the transition display area in the second picture.

[0044] S50, calculating a set of luminance correction coefficients according to the first gray scale data and the third gray scale data.

[0045] In the embodiments of the present application, the set of luminance correction coefficients includes a plurality of luminance correction coefficients, and the number of the luminance correction coefficients is equal to the number of the pixels located in the transition display area.

[0046] In the embodiments of the present application, the luminance correction coefficient of each pixel is calculated according to the ratio of the first gray scale value to the third gray scale value of each pixel.

[0047] In the embodiments of the present application, the first gray scale value of any pixel in the transition display area in the first picture and the third gray scale value of the pixel in the second picture are obtained. The ratio of the first gray scale value to the third gray scale value corresponding to the same pixel is calculated. For example, the first gray scale value is L1 and the third gray scale value is L3, and the ratio of the first gray scale value to the third gray scale value is L1 / L3, that is, the luminance correction coefficient of the pixel is L1 / L3.

[0048] In the embodiments of the present application, the transition display area includes a plurality of pixels arranged in an array, and the ratio of the first gray scale value to the third gray scale value of each pixel, that is, the luminance correction coefficient of each pixel, is calculated, thereby forming a luminance correction coefficient set. Specifically, the third gray scale values corresponding to the plurality of pixels in the transition display area in the second picture are different, that is, the plurality of pixels in the transition display area have different degrees of brightness change caused by the virtual focus, and thus the luminance correction coefficients corresponding to the plurality of pixels in the transition display area in the second picture need to be calculated respectively.

[0049] Similarly, the first gray scale values corresponding to the plurality of pixels in the edge display area in the first picture are different, that is, the plurality of pixels in the edge display area have different degrees of brightness change caused by the virtual focus, and thus the luminance correction coefficients corresponding to the plurality of pixels in the edge display area in the first picture need to be calculated respectively.

[0050] In the embodiments of the present application, the transition display area is provided with M pixel columns, the edge display area is provided with N pixel columns, and the plurality of pixel columns are arranged from the center display area to the edge display area, any pixel column includes K pixels, M and N are both positive integers greater than or equal to 1, and M is greater than or equal to N. That is, the number of pixels in the transition display area is greater than or equal to the number of pixels in the edge display area. And the number of pixel rows in the transition display area is equal to the number of pixel rows in the edge display area, and the number of pixel rows of both is K.

[0051] In the embodiments of the present application, the number of luminance correction coefficients contained in the luminance correction coefficient set is equal to the number of pixels in the edge display area. That is, the luminance correction coefficient set includes N*K luminance correction coefficients.

[0052] S60, calculating the target gray scale data of the plurality of pixels in the edge display area in the first picture according to the luminance correction coefficient set and the second gray scale data.

[0053] In the embodiments of the present application, the luminance correction method of the display panel further includes:

[0054] The luminance correction coefficient corresponding to each pixel in the first picture is obtained according to the luminance correction coefficient set.

[0055] In the embodiment of the present application, the transition display area is provided with M pixel columns, the edge display area is provided with N pixel columns, and the plurality of pixel columns are arranged from the center display area to the edge display area, any pixel column includes K pixels, M, N and K are all positive integers greater than or equal to 1, and M is greater than or equal to N. That is, the number of pixels in the transition display area is greater than or equal to the number of pixels in the edge display area. And the number of pixel rows in the transition display area is equal to the number of pixel rows in the edge display area, and the number of pixel rows of both is K.

[0056] In the embodiment of the present application, the number of luminance correction coefficients contained in the luminance correction coefficient set is equal to the number of pixels in the edge display area. That is, the luminance correction coefficient set includes N*K luminance correction coefficients.

[0057] In the embodiment of the present application, the luminance correction coefficient of the kth pixel in the nth pixel column in the edge display area is equal to the luminance correction coefficient of the kth pixel in the nth pixel column in the transition display area, wherein the nth pixel column is the nth pixel column in the direction from the edge display area to the center display area, that is, the Mth pixel column in the transition display area is located on the side close to the center display area, and the first pixel column in the transition display area is located on the side close to the edge display area. The Nth pixel column in the edge display area is located on the side close to the transition display area, and the first pixel column in the edge display area is located on the side away from the transition display area. n and k are both positive integers greater than or equal to 1, and n is less than or equal to N and k is less than or equal to K. For example, the luminance correction coefficient of the kth pixel in the nth pixel column in the transition display area is B1, and the luminance correction coefficient of the kth pixel in the nth pixel column in the edge display area is B1.

[0058] In the embodiment of the present application, the target gray scale value of each pixel is calculated according to the product of the luminance correction coefficient of each pixel and the second gray scale value.

[0059] In the embodiment of the present application, the second gray scale value of any pixel in the edge display area in the first picture and the luminance correction coefficient of the pixel are obtained. For example, the luminance correction coefficient of the kth pixel in the nth pixel column in the transition display area is B1, and the luminance correction coefficient of the kth pixel in the nth pixel column in the edge display area is B1.

[0060] Further, the product of the luminance correction coefficient and the second gray scale value corresponding to the same pixel is calculated. For example, the second gray scale value is L2, and the luminance correction coefficient is B1, then the product of the luminance correction coefficient and the second gray scale value is L2*B1, that is, the target gray scale value of the pixel is L2*B1.

[0061] S402. Repeat the above steps to obtain the target grayscale values ​​corresponding to multiple pixels located in the edge display area of ​​the first image.

[0062] In the embodiments of this application, the transition display area includes a plurality of pixels arranged in an array. The product of the brightness correction coefficient and the second grayscale value corresponding to each pixel is calculated, that is, the target grayscale value of each pixel. Specifically, the third grayscale values ​​corresponding to the plurality of pixels located in the transition display area in the second image are different, that is, the degree of brightness change caused by the defocusing effect of the plurality of pixels located in the transition display area is different. Therefore, it is necessary to calculate the target grayscale values ​​corresponding to the plurality of pixels located in the transition display area in the second image separately.

[0063] Similarly, the first grayscale values ​​corresponding to multiple pixels located in the edge display area in the first image are different. That is, the degree of brightness change caused by the defocusing effect on multiple pixels located in the edge display area is different. Therefore, it is necessary to calculate the target grayscale values ​​corresponding to multiple pixels located in the edge display area in the first image separately.

[0064] In embodiments of this application, the brightness correction method for the display panel further includes: storing a set of brightness correction coefficients in a preset storage space of the display panel.

[0065] The brightness correction method for the display panel provided in this application involves driving the display panel to display a first image in a central display area, a transition display area, and an edge display area; acquiring first grayscale data of multiple pixels located in the transition display area and second grayscale data of multiple pixels located in the edge display area in the first image; driving the display panel to display a second image in the central display area and the transition display area; acquiring third grayscale data of multiple pixels located in the transition display area in the second image; calculating a brightness correction coefficient set based on the first grayscale data and the third grayscale data; and calculating target grayscale data of multiple pixels located in the edge display area in the first image based on the brightness correction coefficient set and the second grayscale data. Specifically, the brightness correction coefficient set of pixels is calculated based on the first grayscale data of multiple pixels located in the transition display area in the first image (i.e., the grayscale data of pixels without peripheral Mura problems) and the third grayscale data of multiple pixels located in the transition display area in the second image (i.e., the grayscale data of pixels with peripheral Mura problems). This process improves the problem of uneven display in the peripheral display area of ​​the display panel.

[0066] like Figure 4 As shown, an embodiment of this application provides a display device 200, including a display panel 210 and a driving circuit 220, wherein the driving circuit 220 is electrically connected to the display panel 210.

[0067] In the embodiments of the present application, the display panel 210 includes a plurality of pixels 10 arranged in an array. The display panel 210 has a display area AA, which includes a central display area AA1, a transition display area AA2 located on one side of the central display area, and an edge display area AA3 located on one side of the transition display area AA2 away from the central display area AA1.

[0068] In the embodiments of the present application, the display area AA includes four transition display areas AA2 respectively located on four sides of the central display area AA1, and four edge display areas AA3 respectively located on one side of the four transition display areas AA2 away from the central display area AA1. That is, the transition display areas AA2 and the edge display areas AA3 are arranged one by one.

[0069] The driving circuit 220 includes a storage unit 221 and a compensation unit 222.

[0070] In the embodiments of the present application, the storage unit 221 is configured to store a set of luminance correction coefficients obtained according to the luminance correction method of the display panel 210 as described above.

[0071] In the embodiments of the present application, the compensation unit 222 is configured to compensate the display gray scale of the plurality of pixels located in the edge display area of the display panel 210 according to the set of luminance correction coefficients.

[0072] In the display device provided by the present application, the display panel is driven to display a first picture in the central display area, the transition display area, and the edge display area; the first gray scale data of the plurality of pixels located in the transition display area and the second gray scale data of the plurality of pixels located in the edge display area in the first picture are obtained; the display panel is driven to display a second picture in the central display area and the transition display area; the third gray scale data of the plurality of pixels located in the transition display area in the second picture is obtained; a set of luminance correction coefficients is calculated according to the first gray scale data and the third gray scale data; and the target gray scale data of the plurality of pixels located in the edge display area in the first picture is calculated according to the set of luminance correction coefficients and the second gray scale data. That is, the set of luminance correction coefficients of the pixels is calculated according to the first gray scale data of the plurality of pixels located in the transition display area in the first picture (i.e. the gray scale data of the pixels when there is no peripheral Mura problem) and the third gray scale data of the plurality of pixels located in the transition display area in the second picture (i.e. the gray scale data of the pixels when there is a peripheral Mura problem), so that the target gray scale data of the plurality of pixels located in the edge display area in the first picture is calculated according to the set of luminance correction coefficients and the second gray scale data, and the problem of uneven display in the peripheral display area of the display panel is further improved.

[0073] Specifically, the technical solutions of the present application are as follows:

[0074] AsFigure 5 As shown, the edge areas of the displayed image (the first image mentioned above) captured by the camera in out-of-focus mode exhibit blurring and distortion.

[0075] like Figure 6 As shown, in a real display image, the grayscale of pixels in the first six pixel columns from the edge to the center is 0, and the grayscale of pixels in the seventh to thirteenth pixel columns is 100. However, in a display image captured by a camera in out-of-focus mode, the grayscale of pixels in the second to eleventh pixel columns from the edge to the center gradually increases; that is, the grayscale of pixels in the captured display image from the second to sixth pixel columns from the edge to the center is higher than that of pixels in the real display image from the second to the sixth pixel columns from the edge to the center. Conversely, the grayscale of pixels in the captured display image from the seventh to the tenth pixel columns from the edge to the center is lower than that of pixels in the real display image from the seventh to the thirteenth pixel columns from the edge to the center.

[0076] Since images captured in out-of-focus conditions suffer from brightness distortion, we calculate the true grayscale (target grayscale value) of the pixels in the peripheral display area of ​​the LCD panel by measuring the brightness attenuation coefficient (i.e., the brightness correction coefficient mentioned above) of the pixels. Measuring the brightness attenuation coefficient of the pixels in the peripheral display area requires obtaining both the true image brightness and the distorted image brightness, which is achieved through the following method:

[0077] First, take an LCD panel, assuming its resolution is 3840*2160, and fully illuminate the LCD panel. Take a picture with the camera in out-of-focus mode to obtain image M1 (i.e., the first frame mentioned above).

[0078] Then, the LCD panel is controlled to display an image such that the pixels from the first to the Nth pixel column from the edge area to the center area are off (i.e., the grayscale value of the Nth pixel column is 0, and the image corresponding to the Nth pixel column is black), with a display area of ​​(3840-2N)*(2160-2N). The image is then taken while the camera is in out-of-focus mode, resulting in image M2 (the second image mentioned above).

[0079] According to the image M1, the real brightness of the (N+1)th pixel column to the 2Nth pixel column arranged from the edge region to the center region can be obtained, and the image M2 can obtain the brightness of the (N+1)th pixel column to the 2Nth pixel column arranged from the edge region to the center region after attenuation, so as to obtain the corresponding relationship b1 (that is, the brightness correction coefficient in the above) of the brightness of the (N+1)th pixel column to the 2Nth pixel column arranged from the edge region to the center region before and after attenuation.

[0080] The brightness of the pixels in the first pixel column to the Nth pixel column arranged from the edge region to the center region in the image M1 is corrected by using b1, and the target gray scale of the pixels (that is, the real brightness of the picture) is obtained. Wherein, Mc=M1*b1, Mc refers to the target gray scale of the pixels, and M1 refers to the display gray scale of the pixels in the edge region before correction.

[0081] The value of N is related to the virtual focus range of the shooting device, for example, the virtual focus range of a 1600-megapixel camera is 16 pixel columns, and the value of N is between 20 pixel columns and 30 pixel columns.

[0082] The brightness correction method and the device and the display device of the display panel input by the embodiment of the present application are described in detail above, and the above embodiment is only used to help understand the core idea of the present application, and the above description should not be understood as the limitation of the protection scope of the present application.

Claims

1. A method for brightness correction of a display panel, characterized in that, The display panel includes a plurality of pixels arranged in an array, and has a display area including a central display area, a transition display area located at one side of the central display area, and an edge display area located at one side of the transition display area away from the central display area. A brightness correction method of the display panel includes: driving the display panel to display a first picture in the central display area, the transition display area, and the edge display area; obtaining first gray scale data of a plurality of pixels in the transition display area and second gray scale data of a plurality of pixels in the edge display area in the first picture; driving the display panel to display a second picture in the central display area and the transition display area; obtaining third gray scale data of a plurality of pixels in the transition display area in the second picture; calculating a set of brightness correction coefficients according to the first gray scale data and the third gray scale data; calculating target gray scale data of a plurality of pixels in the edge display area in the first picture according to the set of brightness correction coefficients and the second gray scale data.

2. The brightness correction method of a display panel according to claim 1, wherein The transition display area is provided with M pixel columns, the edge display area is provided with N pixel columns, and a plurality of the pixel columns are arranged from the central display area to the edge display area. Any one of the pixel columns includes K pixels, M, N, and K are all positive integers greater than or equal to 1, and M is greater than or equal to N.

3. The method of brightness correction of a display panel according to claim 2, wherein, The brightness correction method of the display panel further includes: obtaining the brightness correction coefficients corresponding to a plurality of the pixels in the edge display area in the first picture according to the set of brightness correction coefficients.

4. The brightness correction method of a display panel according to claim 2 or 3, wherein The brightness correction coefficient of the kth pixel in the nth pixel column in the edge display area is equal to the brightness correction coefficient of the kth pixel in the nth pixel column in the transition display area, where the nth pixel column is the nth pixel column in the direction from the edge display area to the central display area, n and k are both positive integers greater than or equal to 1, n is less than or equal to N, and k is less than or equal to K.

5. The method of brightness correction of a display panel according to claim 1, wherein The set of brightness correction coefficients includes a plurality of brightness correction coefficients, and the number of the brightness correction coefficients is equal to the number of the pixels in the transition display area.

6. The method of brightness correction of a display panel according to claim 1, wherein The first gray scale data includes a plurality of first gray scale values, the third gray scale data includes a plurality of third gray scale values, and the set of brightness correction coefficients includes a plurality of brightness correction coefficients. The step of calculating the set of brightness correction coefficients according to the first gray scale data and the third gray scale data includes: calculating the brightness correction coefficient of each pixel according to the ratio of the first gray scale value to the third gray scale value of each pixel.

7. The method of brightness correction of a display panel according to claim 1, wherein The second gray scale data includes a plurality of second gray scale values. The step of calculating the target gray scale data of a plurality of the pixels in the edge display area in the first picture according to the set of brightness correction coefficients and the second gray scale data includes: calculating the target gray scale value of each pixel according to the product of the brightness correction coefficient and the second gray scale value of each pixel.

8. The method of brightness correction of a display panel according to claim 1, wherein, The brightness correction method of the display panel further includes: The luminance correction coefficient set is stored in a preset storage space of the display panel.

9. A luminance correction device of a display panel, characterized by comprising: The application relates to a display panel and a display method thereof. The driving module is used for driving the display panel to display a first picture in a central display area, a transition display area and an edge display area, and is used for driving the display panel to display a second picture in the central display area and the transition display area, wherein the transition display area is located on one side of the central display area, and the edge display area is located on a side of the transition display area away from the central display area. The acquisition module is used for acquiring first gray scale data of a plurality of pixels in the transition display area in the first picture and second gray scale data of a plurality of pixels in the edge display area, and is used for acquiring third gray scale data of a plurality of pixels in the transition display area in the second picture. The calculation module is used for calculating a luminance correction coefficient set according to the first gray scale data and the third gray scale data, and is used for calculating target gray scale data of a plurality of the pixels in the edge display area in the first picture according to the luminance correction coefficient set and the second gray scale data.

10. A display device, characterized by comprising: The application relates to a display panel and a display method thereof. The display panel comprises a plurality of pixels arranged in an array, and has a display area, wherein the display area comprises a central display area, a transition display area and an edge display area, the transition display area is located on one side of the central display area, and the edge display area is located on a side of the transition display area away from the central display area. The driving circuit is electrically connected with the display panel, and comprises a storage unit and a compensation unit, wherein the storage unit is used for storing a luminance correction coefficient set acquired according to the luminance correction method of the display panel according to any one of claims 1-8; and the compensation unit is used for compensating display gray scales of a plurality of the pixels in the edge display area of the display panel according to the luminance correction coefficient set.

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