Brightness compensation method and device of display panel and display equipment

Abstract

The application discloses a brightness compensation method, device and display equipment of a display panel. The brightness compensation method comprises: obtaining a to-be-processed image of an edge region, the to-be-processed image comprising a plurality of first pixels distributed along a first direction, the plurality of first pixels comprising first binding point pixels; determining a plurality of first compensation pixels based on the brightness of each first pixel distributed along the first direction and each first binding point pixel; for any two adjacent first compensation pixels, obtaining a first interpolation strategy between the two first compensation pixels based on the brightness of each first pixel between the two first compensation pixels; and compensating the brightness of each first pixel between the two first compensation pixels based on the brightness compensation data of the two first compensation pixels and the first interpolation strategy. The brightness compensation of the application can be more in line with the actual mura situation of the edge region, and thus can accurately compensate the peripheral mura, greatly improving the display quality.

Description

TECHNICAL FIELD

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

[0002] For a TFT (Thin Film Transistor) liquid crystal display panel, due to a large number of and complex manufacturing processes, improper operation of any manufacturing process may cause mura of the display panel, that is, different degrees of color difference are visually perceived under the same light source and the same background color. The edge region of the display panel usually presents a bright phenomenon due to the existence of mura.

[0003] A common way for mura of the display panel is to perform demura processing on the display panel. However, due to the edge diffusion phenomenon of the camera and the usually complex mura condition of the edge region, after performing demura processing on the entire display panel, the pixels in the edge region may be weakly corrected or overcorrected, and thus the edge region of the display panel may still present a bright phenomenon, affecting the display quality. SUMMARY

[0004] Embodiments of the present application provide a brightness compensation method, device and display device of a display panel to improve the mura compensation effect of the edge region of the display panel and improve the display quality.

[0005] To solve the above technical problems, embodiments of the present application disclose the following technical solutions:

[0006] In a first aspect, a brightness compensation method of a display panel is provided for compensating the brightness of an edge region, and the method comprises:

[0007] Obtaining a to-be-processed image of the edge region, the to-be-processed image comprising a plurality of first pixels distributed along a first direction, and the plurality of first pixels comprising first binding point pixels;

[0008] Determining a plurality of first compensation pixels based on the brightness of each first pixel and each first binding point pixel;

[0009] For any two adjacent first compensation pixels, obtaining a first interpolation strategy between the two first compensation pixels based on the brightness of each first pixel located between the two first compensation pixels;

[0010] Compensating the brightness of each first pixel located between the two first compensation pixels based on the brightness compensation data of the two first compensation pixels and the first interpolation strategy.

[0011] In combination with the first aspect, the first compensation pixels are determined based on the brightness of the first pixels and the first anchor pixels.

[0012] A first brightness curve is generated based on the brightness of the first pixels.

[0013] The first brightness curve is divided into multiple first curve segments based on the first anchor pixels on the first brightness curve.

[0014] New anchor pixels are obtained based on the distribution of each first curve segment.

[0015] Each of the first anchor pixels and each of the new anchor pixels are collectively determined as the first compensation pixels.

[0016] In combination with the first aspect, the first compensation pixels are determined based on the brightness of the first pixels and the first anchor pixels.

[0017] A first brightness curve is generated based on the brightness of the first pixels.

[0018] Target anchor pixels are selected from the first anchor pixels based on the first brightness curve and the first anchor pixels.

[0019] Each of the target anchor pixels is determined as the first compensation pixels.

[0020] In combination with the first aspect, the first interpolation strategy is configured as linear interpolation or nonlinear interpolation, and the nonlinear interpolation is configured as any one of polynomial interpolation, parabolic interpolation, and cubic spline interpolation.

[0021] In combination with the first aspect, the image to be processed further includes second pixels distributed along a second direction, the second pixels include second anchor pixels, and the second direction intersects the first direction; the method further includes:

[0022] Second compensation pixels are determined based on the brightness of the second pixels and the second anchor pixels.

[0023] For any two adjacent second compensation pixels, a second interpolation strategy between the two second compensation pixels is obtained based on the brightness of the second pixels between the two second compensation pixels.

[0024] The brightness of each of the second pixels between the two second compensation pixels is compensated based on the brightness compensation data of the two second compensation pixels and the second interpolation strategy.

[0025] In combination with the first aspect, the image to be processed further includes a third pixel, the third pixel being a pixel that is positionally overlapped with the first pixel and the second pixel; and the method further includes:

[0026] obtaining a first compensation value and a second compensation value of the third pixel, the first compensation value being a luminance compensation value of the third pixel obtained by the first interpolation strategy, and the second compensation value being a luminance compensation value of the third pixel obtained by the second interpolation strategy;

[0027] obtaining a third compensation value of the third pixel based on the first compensation value, a first preset weight, the second compensation value and a second preset weight, so as to compensate the luminance of the third pixel by using the third compensation value.

[0028] In combination with the first aspect, the obtaining of the third compensation value of the third pixel based on the first compensation value, the first preset weight, the second compensation value and the second preset weight includes:

[0029] the third compensation value of the third pixel is obtained by using the following formula:

[0030] L3 = δ1 × L1 + δ2 × L2

[0031] wherein, L3 is the third compensation value of the third pixel, δ1 is the first preset weight, L1 is the first compensation value, δ2 is the second preset weight, and L2 is the second compensation value.

[0032] In combination with the first aspect, the obtaining of the image to be processed of the edge region includes:

[0033] obtaining a gray scale image of the display panel by using a camera;

[0034] extracting the image to be processed of the edge region from the gray scale image.

[0035] In a second aspect, a luminance compensation device of a display panel is provided, which is used for compensating the luminance of an edge region, and the device includes:

[0036] an image obtaining module, configured to obtain an image to be processed of the edge region, the image to be processed including a plurality of first pixels distributed along a first direction, and the plurality of first pixels including first binding point pixels;

[0037] a compensation pixel determining module, configured to determine a plurality of first compensation pixels based on the luminance of each of the first pixels and each of the first binding point pixels;

[0038] An interpolation strategy determination module is configured to, for any two adjacent first compensation pixels, acquire a first interpolation strategy between the two first compensation pixels based on the brightness of each first pixel located between the two first compensation pixels.

[0039] A brightness compensation module is configured to compensate the brightness of each first pixel located between the two first compensation pixels based on the brightness compensation data of the two first compensation pixels and the first interpolation strategy.

[0040] In a third aspect, a display device is provided, which includes a display panel and a processor configured to compensate for brightness unevenness of an edge region of the display panel by using the method according to any one of the first aspect.

[0041] One of the above technical solutions has the following advantages or beneficial effects:

[0042] Compared with the prior art, the brightness compensation method of the display panel provided in the present application includes: acquiring a to-be-processed image of an edge region, the to-be-processed image including a plurality of first pixels distributed along a first direction, the plurality of first pixels including first bind point pixels; determining a plurality of first compensation pixels based on the brightness of each first pixel distributed along the first direction and each first bind point pixel; for any two adjacent first compensation pixels, acquiring a first interpolation strategy between the two first compensation pixels based on the brightness of each first pixel located between the two first compensation pixels; and compensating the brightness of each first pixel located between the two first compensation pixels based on the brightness compensation data of the two first compensation pixels and the first interpolation strategy. The brightness compensation method provided in the present application can determine the first compensation pixels and the first interpolation strategy based on the brightness distribution of the first pixels of the edge region, so that the brightness compensation can be more in line with the actual mura situation of the edge region, and thus the panel with peripheral mura quality problems can be compensated accurately, greatly improving the display quality.

[0043] The brightness compensation device provided in the present application can set the compensation interval and the interpolation method of the pixel compensation value between intervals according to the severity of the peripheral mura, so as to improve the compensation effect of the peripheral mura, thereby achieving the purpose of improving quality and efficiency, effectively improving the panel quality, and improving the product quality.

[0044] The display device provided in the present application can compensate for the actual situation of the edge mura after Demura processing, so that the brightness compensation can be more in line with the actual mura situation of the edge region, and the overall display quality can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] 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 description of the embodiments. Obviously, the drawings described below are only some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art based on the drawings without creative labor are within the protection scope of the present application.

[0046] Figure 1 The schematic diagram of the adjusting architecture for the display panel to perform Demura processing;

[0047] Figure 2 The schematic diagram of the overall flow of the brightness compensation method for the display panel in the embodiments of the present application;

[0048] Figure 3 The schematic diagram of one example of the to-be-processed image of the edge region in the embodiments of the present application;

[0049] Figure 4 The schematic diagram of one example of the first brightness curve in the embodiments of the present application;

[0050] Figure 5 The schematic diagram of another example of the first brightness curve in the embodiments of the present application;

[0051] Figure 6 The schematic diagram of another example of the to-be-processed image of the edge region in the embodiments of the present application;

[0052] Figure 7 The schematic diagram of the structure of the brightness compensation device for the display panel in the embodiments of the present application;

[0053] Figure 8 The schematic diagram of the structure of the display device in the embodiments of the present application.

[0054] Reference signs:

[0055] 10-display panel; 20-camera; 30-preprocessing module; 40-Demura processing module; 50-burner; 60-processor; 701-image acquisition module; 702-compensation pixel determination module; 703-interpolation strategy determination module; 704-brightness compensation module. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the protection scope of the present application.

[0057] In the description of the present application, it is understood that in the description of the present application, it is understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, at least one of which can be one, two or more, unless otherwise specifically limited.

[0058] In the present application, "De-" in Demura means removal, and Demura refers to removing mura, which refers to a defect of uneven brightness. The word mura comes from Japanese and translates into Chinese as cloud or cloud pattern. In the field of display panels, this term is a professional term for describing a certain specific surface defect, which refers to the different degrees of color difference perceived by the vision under the same light source and the same color picture. Common types of mura usually include linear mura, block mura and surface mura.

[0059] Please refer to Figure 1 , Figure 1An adjustment architecture for Demura processing of a display panel is shown. In order to address the brightness non-uniformity of the display panel 10 caused by common mura, the display panel 10 usually needs to be processed by Demura. The common adjustment architecture mainly includes a camera 20, a preprocessing module 30, a Demura processing module 40 and a burner 50. The camera 20 usually has a high-precision lens for taking pictures of the display panel 10. The exposure time or the shooting area of the camera 20 can be set to adjust the effect of the shooting image. The preprocessing module 30 is used to preprocess the obtained shooting image, including perspective correction and brightness correction, to remove the influence of the actual brightness of the display panel 10 caused by the camera 20 and the perspective. The Demura processing module 40 is used to first divide the display panel 10 into multiple blocks, for example, 4x4 pixels constitute a block, then calculate the brightness of each block on the display panel 10, then calculate the brightness of the center area of the display panel 10, and set the brightness as the target brightness of the overall panel, and finally perform difference fitting on the brightness of each block of the display panel 10 and the target brightness to obtain the compensation value of the brightness of each area of the display panel 10 and generate compensation data. The burner 50 is used to burn the compensation data into the XB flash of the display panel 10 to perform brightness compensation.

[0060] The brightness non-uniformity of the entire display panel 10 is compensated by the above-mentioned Demura method. However, due to the diffraction phenomenon at the edge of the camera 20, and the mura condition of the edge area is usually complex, the brightness is usually nonlinearly distributed, so the above-mentioned Demura method may have weak correction or over-correction for the pixels in the edge area, so that the mura compensation effect of the edge area of the display panel 10 is not obvious, and the edge area of the display panel 10 after compensation may still have a bright phenomenon, affecting the display quality.

[0061] Therefore, the embodiments of the present application provide a brightness compensation method of a display panel for compensating the brightness non-uniformity of the edge area. The method adjusts the compensation accuracy or interpolation strategy based on the actual mura condition of the edge area, so as to accurately compensate the edge mura of the display panel 10, improve the display quality, and thus at least partially solve the above technical problems.

[0062] Please refer to Figure 2 , Figure 2 The overall flow of the brightness compensation method of the display panel according to the embodiments of the present application is shown. The brightness compensation method of the display panel includes the following steps:

[0063] Step 201: obtaining a to-be-processed image of the edge region, the to-be-processed image comprising a plurality of first pixels distributed along a first direction X, the plurality of first pixels comprising a first binding point pixel.

[0064] Specifically, the gray scale image of the display panel 10 can be obtained by the camera 20, and then the to-be-processed image of the edge region is extracted from the gray scale image.

[0065] It can be understood that the display panel 10 of the embodiment of the present application can have been processed by Demura.

[0066] Please refer to Figure 3 , Figure 3 An example of the to-be-processed image of the edge region in the embodiment of the present application is shown. In some examples, the first direction X can be the row direction of the display panel 10. The to-be-processed image P T may comprise two first sub-images P1 distributed on both sides of the center region along the first direction X, each first sub-image P1 comprising a plurality of first pixels a distributed along the first direction X, each first sub-image P1 having a first width W1 along the first direction X, and W1 can be the length of n block intervals. For example, n can be set to 5. Each first sub-image P1 can have a first height H1 along the second direction Y, and the gray scale image P0 has a height H0 along the second direction Y, satisfying H1≤H0. The second direction Y intersects the first direction X, and specifically can be the column direction of the display panel 10.

[0067] In other examples, the first direction X can also be the column direction of the display panel 10, and the second direction Y is the row direction of the display panel 10, which is not limited in particular.

[0068] Step 202: determining a plurality of first compensation pixels based on the brightness of each first pixel a and each first binding point pixel.

[0069] In some embodiments, the plurality of first compensation pixels A T :

[0070] Step 1: generating a first brightness curve based on the brightness of each first pixel a distributed along the first direction X.

[0071] Specifically, the position of each first pixel a can be taken as the abscissa, the brightness of each first pixel a can be taken as the ordinate, and the brightness of any two adjacent first pixels a can be connected to generate a first brightness curve corresponding to the row of first pixels a.

[0072] Please refer to Figure 4 , Figure 4An example of the first brightness curve of the embodiment of the present application is shown. Taking a row of first pixels a distributed along the first direction X as an example, it is assumed that the number of the present first binding point pixels is 5, which are A1-A5 respectively, and there are 3 first pixels a between any two adjacent first binding point pixels A i and A i+1 . According to the brightness of each first pixel a, the first brightness curve L1 is generated. At this time, the first brightness curve L1 is linearly distributed.

[0073] Step two, based on the first brightness curve L1 and each first binding point pixel A i , a target binding point pixel is selected from the plurality of first binding point pixels A i .

[0074] Exemplarily, by fitting analysis on the data of the first brightness curve L1, the brightness fitting curve of each first pixel a in the first brightness curve L1 can be obtained, and the brightness fitting curve has a linear rule. The deviation of the brightness fitting curve and the first brightness curve L1 is obtained, and if the deviation of the brightness fitting curve and the first brightness curve L1 satisfies a set threshold, it can be determined that the first brightness curve L1 satisfies the linear rule corresponding to the brightness fitting curve, and then only two first binding point pixels A1 and A5 located at the two end positions of the plurality of first binding point pixels A i can be reserved, and the remaining first binding point pixels A2, A3, A4 are removed, and the two first binding point pixels A1 and A5 located at the two end positions are determined as the target binding point pixels.

[0075] Step three, each target binding point pixel is determined as a first compensation pixel A T .

[0076] In the above manner, the storage capacity of the binding point pixels can be greatly reduced, and the first pixels a at the remaining positions can be linearly interpolated by the TCON (logic board), so that the compensation effect and the storage cost can be considered.

[0077] In some other embodiments, the plurality of first compensation pixels A T may be determined by the following steps:

[0078] Step one, based on the brightness of each first pixel a distributed along the first direction X, a first brightness curve is generated.

[0079] Please refer to Figure 5 , Figure 5 Another example of the first brightness curve of the embodiment of the present application is shown. Taking a row of first pixels a distributed along the first direction X as an example, it is assumed that the number of the present first binding point pixels is 5, which are A1-A5 respectively, and there are 3 first pixels a between any two adjacent first binding point pixels A i and A i+1Three first pixels a are spaced apart. According to the brightness of each first pixel a, a first brightness curve L1 is generated. At this time, the first brightness curve L1 is a nonlinear distribution.

[0080] Step two, based on each first binding point pixel A on the first brightness curve L1 i The first brightness curve L1 is divided into a plurality of first curves.

[0081] Exemplarily, at least one brightness fitting curve of each first pixel a in the first brightness curve L1 can be obtained by fitting analysis of the data of the first brightness curve L1 in at least one way. The at least one brightness fitting curve has a nonlinear rule. The brightness fitting curve is compared with the first brightness curve L1, and the deviation therebetween is obtained. If there is no brightness fitting curve with a deviation from the first brightness curve L1 satisfying a set threshold, it can be confirmed that the brightness of each first pixel a does not satisfy the same distribution rule.

[0082] Then at least one fitting analysis of the data of each first curve can be performed. The brightness fitting curve is compared with the first curve, and the deviation therebetween is obtained. If there is a brightness fitting curve with a deviation from the first curve satisfying a set threshold, it can be determined that the two first binding point pixels A i The first curve can be fitted without adding a binding point pixel. If there is no brightness fitting curve with a deviation from the first curve satisfying a set threshold, it can be confirmed that the two first binding point pixels A i The first curve is fitted, and a binding point pixel A j .

[0083] Step three, based on the distribution of each first curve, the added binding point pixel A j .

[0084] It can be understood that based on the distribution of each first curve, a binding point pixel may need to be added, or may not need to be added, which can be determined according to the distribution of the first curve.

[0085] Exemplarily, the added binding point pixel A j may be arranged at the center position of the corresponding first curve, so that each first binding point pixel A i and each added binding point pixel A j forms an equidistant distribution. Alternatively, the inflection point on each first curve can be obtained, and the inflection point is determined as the added binding point pixel A j .

[0086] Step four, each first binding point pixel A i and each added binding point pixel Aj Together they were identified as the first compensation pixel A. T .

[0087] Understandably, in special scenarios, such as when even if a new binding point pixel is added to each segment of the first curve, it is still impossible to obtain a fitting curve with the required deviation through the preset fitting method. In such cases, each first pixel a may be determined as the first compensation pixel to achieve the maximum compensation accuracy, which corresponds to the actual number of first pixels a of the display panel 10. At this time, the brightness compensation value corresponds one-to-one with the pixel position, and no interpolation is required.

[0088] Using the above method, the first compensation pixel A can be flexibly determined based on the first brightness curve L1. T The number and spacing of these pixels allow for the determination of a more suitable first compensation pixel A. T To compensate for edge mura.

[0089] Step 203: For any two adjacent first compensation pixels A T Based on the two first compensation pixels A T The brightness of each first pixel a between the two first compensation pixels is used to obtain the first interpolation strategy between the two first compensation pixels.

[0090] Specifically, the fitting method can be based on at least one pre-defined fitting method to the two first compensation pixels A. T The fitting analysis is performed on the first brightness curve L1 between the two curves to obtain the fitting curves corresponding to each fitting method. If at least one fitting curve has a fitting curve whose deviation from the first brightness curve L1 meets the set threshold, then the fitting method corresponding to the fitting curve can be determined as the first interpolation strategy.

[0091] For example, the first interpolation strategy can be configured as linear interpolation or nonlinear interpolation. Nonlinear interpolation can be configured as any one of polynomial interpolation, parabolic interpolation, and cubic spline interpolation, or as other interpolation methods, which can be set as needed.

[0092] Step 204: Based on two first compensation pixels A T The brightness compensation data, and the first interpolation strategy, are used to calculate the brightness compensation data for the two first compensation pixels A. T The brightness of each first pixel a is compensated.

[0093] It is understandable that, for each of the first compensation pixels A distributed along the first direction X... T We only need to interpolate along the first direction X to obtain the brightness compensation value for each first pixel a. There is no first compensation pixel A. T The lines do not require brightness compensation.

[0094] In this way, by the above manner, the luminance of each first pixel a between any two adjacent first compensation pixels A T can be interpolated by different interpolation strategies, and can be converted from a traditional linear interpolation to a special nonlinear interpolation, so that the display panel 10 can accurately repair the edge mura, thereby greatly improving the display effect.

[0095] Please refer to Figure 6 , Figure 6 Another example of a to-be-processed image of an edge region in an embodiment of the present application is shown. In some embodiments, the first direction X can be the row direction of the display panel 10, and the second direction Y intersects the first direction X, and can be the column direction of the display panel 10. The to-be-processed image P T may also include two second sub-images P2 distributed on both sides of the center region along the second direction Y, each second sub-image P2 including a plurality of second pixels b distributed along the second direction Y, and each second sub-image P2 can have a second height H2 along the second direction Y, and H2 can be the length of n block intervals. For example, n can be set to 5. Each second sub-image P2 can have a second width W2 along the first direction X, and the gray scale image P0 has a width W0 along the first direction X, and W2≤W0. Wherein, the plurality of second pixels b include second binding point pixels B i The luminance compensation method of the embodiment of the present application can also include the following steps:

[0096] Step 1, based on the luminance of each second pixel b distributed along the second direction Y, and each second binding point pixel B i , a plurality of second compensation pixels are determined.

[0097] Specifically, the positions of each second pixel b can be taken as the abscissa, and the luminance of each second pixel b can be taken as the ordinate, and the luminance of any two adjacent second pixels b can be connected to generate a second luminance curve corresponding to the column of second pixels b.

[0098] It should be noted that the specific way of determining the second compensation pixel can refer to the way of determining the first compensation pixel in the foregoing step 202, and the specific way of determining the second compensation pixel is not described here.

[0099] Step 2, for any two adjacent second compensation pixels, based on the luminance of each second pixel between the two second compensation pixels, a second interpolation strategy between the two second compensation pixels is obtained.

[0100] For example, the second interpolation strategy can be configured as a linear interpolation or a nonlinear interpolation, and the nonlinear interpolation can be configured as any one of a polynomial interpolation, a parabolic interpolation and a cubic spline interpolation, or can be configured as other interpolation manners, which can be set as needed.

[0101] It should be noted that the specific way of obtaining the second interpolation strategy can refer to the way of obtaining the first interpolation strategy in the foregoing step 203, and is specifically determined according to the brightness distribution of each column of second pixels b, which will not be described here.

[0102] Step three, compensating the brightness of each second pixel located between the two second compensation pixels based on the brightness compensation data of the two second compensation pixels and the second interpolation strategy.

[0103] It can be understood that for each second compensation pixel distributed along the second direction Y, only interpolation along the second direction Y is needed to obtain the brightness compensation value of each second pixel. The column without second compensation pixels can not be compensated.

[0104] In this way, through the above-mentioned manner, the interval of compensation and the interpolation manner of pixel compensation value between intervals can be set according to the severity of the peripheral mura of the display panel 10, so as to improve the compensation effect of the peripheral mura, and then the purpose of improving quality and efficiency is achieved, the panel quality is effectively improved, and the product quality is improved.

[0105] Please continue to refer to Figure 6 In some embodiments, the image P T Further comprising a third pixel c, the third pixel being a pixel in the plurality of first pixels a and the plurality of second pixels b that is positionally overlapped. The brightness compensation method of the embodiments of the present application can further comprise the following steps:

[0106] Step one, obtaining a first compensation value and a second compensation value of the third pixel c, wherein the first compensation value is a brightness compensation value of the third pixel obtained by a first interpolation strategy, and the second compensation value is a brightness compensation value of the third pixel obtained by a second interpolation strategy.

[0107] Step two, obtaining a third compensation value of the third pixel based on the first compensation value, a first preset weight, the second compensation value and a second preset weight, so as to compensate the brightness of the third pixel c by the third compensation value.

[0108] Specifically, the third compensation value of the third pixel c can be obtained by the following formula:

[0109] L3 = δ1 x L1 + δ2 x L2

[0110] Wherein, L3 is the third compensation value of the third pixel c, δ1 is the first preset weight, L1 is the first compensation value, δ2 is the second preset weight, and L2 is the second compensation value. In addition, the first preset weight δ1 and the second preset weight δ2 can also satisfy δ1 + δ2 = 1. Exemplarily, the first preset weight δ1 can be set to 0.7, and the second preset weight δ2 can be set to 0.3.

[0111] In this way, the luminance of the pixels located in the corner region of the display panel 10 can be compensated more accurately, and the overall display effect is further improved.

[0112] It can be understood that the luminance compensation method of the embodiments of the present application can improve the TCON pixel interpolation method for compensation between the peripheral blocks of the display panel 10 according to the characteristics of the peripheral mura. The compensation data of the pixels between the blocks can be generated using linear interpolation or special interpolation methods. According to the severity of the peripheral mura, the interval of the compensation and the interpolation method of the pixel compensation value between the intervals can be set to improve the compensation method of the edge mura of the display panel 10, improve the compensation effect of the peripheral mura, and thus achieve the purpose of improving quality and efficiency. The panel quality is effectively improved, and the product quality is improved.

[0113] Correspondingly, please refer to Figure 7 , Figure 7 The structure diagram of the luminance compensation device of the display panel according to the embodiments of the present application is shown. The luminance compensation device of the display panel provided by the embodiments of the present application is used to compensate the luminance of the edge region, and can be specifically executed after the Demura processing module 40. The device specifically includes an image acquisition module 701, a compensation pixel determination module 702, an interpolation strategy determination module 703, and a luminance compensation module 704.

[0114] The image acquisition module 701 is used to acquire a to-be-processed image of the edge region. The to-be-processed image includes a plurality of first pixels distributed along a first direction, and the plurality of first pixels includes first binding point pixels.

[0115] The compensation pixel determination module 702 is used to determine a plurality of first compensation pixels based on the luminance of each first pixel and each first binding point pixel.

[0116] The interpolation strategy determination module 703 is used to acquire a first interpolation strategy between any two adjacent first compensation pixels based on the luminance of each first pixel located between the two first compensation pixels.

[0117] The luminance compensation module 704 is used to compensate the luminance of each first pixel located between the two first compensation pixels based on the luminance compensation data of the two first compensation pixels and the first interpolation strategy.

[0118] In some embodiments, the compensation pixel determination module 702 is specifically used to:

[0119] Generate a first luminance curve based on the luminance of each first pixel.

[0120] Divide the first luminance curve into a plurality of first curve segments based on each first binding point pixel on the first luminance curve.

[0121] Based on the distribution of each first curve, obtain new binding point pixels.

[0122] Each first binding point pixel and each new binding point pixel are collectively determined as a first compensation pixel.

[0123] In some embodiments, the compensation pixel determination module 702 is specifically configured to:

[0124] Based on the brightness of each first pixel, generate a first brightness curve.

[0125] Based on the first brightness curve and each first binding point pixel, select a target binding point pixel from the plurality of first binding point pixels.

[0126] Each target binding point pixel is determined as a first compensation pixel.

[0127] In some embodiments, the first interpolation strategy is configured as linear interpolation or nonlinear interpolation, and the nonlinear interpolation is configured as any one of polynomial interpolation, parabolic interpolation, and cubic spline interpolation.

[0128] In some embodiments, the image to be processed further includes a plurality of second pixels distributed along a second direction, the plurality of second pixels includes a second binding point pixel, and the second direction intersects the first direction. The compensation pixel determination module 702 is further configured to:

[0129] Based on the brightness of each second pixel and each second binding point pixel, determine a plurality of second compensation pixels.

[0130] The interpolation strategy determination module 703 is further configured to, for any two adjacent second compensation pixels, obtain a second interpolation strategy between the two second compensation pixels based on the brightness of each second pixel located between the two second compensation pixels.

[0131] The brightness compensation module 704 is further configured to compensate the brightness of each second pixel located between the two second compensation pixels based on the brightness compensation data of the two second compensation pixels and the second interpolation strategy.

[0132] In some embodiments, the image to be processed further includes a third pixel, and the third pixel is a pixel that is positionally overlapped in the plurality of first pixels and the plurality of second pixels. The device further includes:

[0133] A compensation correction module is configured to obtain a first compensation value and a second compensation value of the third pixel, the first compensation value being a brightness compensation value of the third pixel obtained by the first interpolation strategy, and the second compensation value being a brightness compensation value of the third pixel obtained by the second interpolation strategy.

[0134] And, based on the first compensation value, the first preset weight, the second compensation value and the second preset weight, a third compensation value of the third pixel is obtained to compensate the brightness of the third pixel by the third compensation value.

[0135] In some embodiments, the compensation correction module is specifically configured to:

[0136] The third compensation value of the third pixel is obtained by the following formula:

[0137] L3=δ1×L1+δ2×L2

[0138] Wherein, L3 is the third compensation value of the third pixel, δ1 is the first preset weight, L1 is the first compensation value, δ2 is the second preset weight, and L2 is the second compensation value.

[0139] In some embodiments, the image acquisition module 701 is specifically configured to:

[0140] The gray scale image of the display panel is acquired by the camera.

[0141] The to-be-processed image of the edge region is extracted from the gray scale image.

[0142] It can be understood that the brightness compensation device of the embodiments of the present application can specifically set the compensation interval and the interpolation method of the pixel compensation value between the intervals according to the severity of the peripheral mura, so as to improve the compensation effect of the peripheral mura, and thus achieve the purpose of improving quality and efficiency, effectively improve the panel picture quality, and improve the product quality.

[0143] Correspondingly, please refer to Figure 8 , Figure 8 The structure of the display device of the embodiments of the present application is illustrated. The display device provided by the embodiments of the present application, for example, a liquid crystal display device (LCD), can include a display panel 10 and a processor 60. The processor 60 adopts the brightness compensation method of the foregoing embodiments to compensate the brightness unevenness of the edge region of the display panel 10.

[0144] In the embodiments of the present application, the display device can be a mobile phone, or a notebook computer, a desktop computer, a television, a smart wearable device, etc., and the specific form of the display device is not specially limited in the embodiments.

[0145] The display device provided by the embodiments of the present application can compensate the edge mura according to the actual situation after Demura processing, so that the brightness compensation can be more suitable for the actual mura situation of the edge region, and the overall display quality can be greatly improved.

[0146] It should be noted that each of the above embodiments of the display panel brightness compensation method, device and display equipment can be mutually referred to. For features not specifically described in a certain embodiment, the relevant content in other embodiments can be referred to.

[0147] The above describes in detail the display panel brightness compensation method, device and display equipment provided by the embodiments of the present application. The principles and implementation manners of the present application are described by applying specific examples. The above embodiment descriptions are only used to help understand the technical solutions and core ideas of the present application. Those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced equivalently. These modifications or replacements do not change the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for brightness compensation of a display panel, characterized in that, A method for compensating brightness of an edge region, the method comprising: acquiring a gray scale image of the display panel by a camera, and extracting a to-be-processed image of the edge region from the gray scale image to obtain the to-be-processed image of the edge region, the to-be-processed image comprising a plurality of first pixels distributed along a first direction, the plurality of first pixels comprising first binding point pixels; determining a plurality of first compensation pixels based on brightness of each of the first pixels and each of the first binding point pixels; for any two adjacent first compensation pixels, obtaining a first interpolation strategy between the two first compensation pixels based on brightness of each of the first pixels located between the two first compensation pixels; compensating brightness of each of the first pixels located between the two first compensation pixels based on brightness compensation data of the two first compensation pixels and the first interpolation strategy. 2.The brightness compensation method of a display panel according to claim 1, wherein, The determining of the plurality of first compensation pixels based on brightness of each of the first pixels and each of the first binding point pixels comprises: generating a first brightness curve based on brightness of each of the first pixels; dividing the first brightness curve into a plurality of first curve segments based on each of the first binding point pixels on the first brightness curve; obtaining new binding point pixels based on distribution of each of the first curve segments; and determining each of the first binding point pixels and each of the new binding point pixels as the first compensation pixels. 3.The brightness compensation method of the display panel according to claim 1, characterized in that, The determining of the plurality of first compensation pixels based on brightness of each of the first pixels and each of the first binding point pixels comprises: generating a first brightness curve based on brightness of each of the first pixels; selecting target binding point pixels from the plurality of first binding point pixels based on the first brightness curve and each of the first binding point pixels; and determining each of the target binding point pixels as the first compensation pixels.

4. The brightness compensation method of a display panel according to any one of claims 1 to 3, characterized in that, The first interpolation strategy is configured as linear interpolation or nonlinear interpolation, and the nonlinear interpolation is configured as any one of polynomial interpolation, parabolic interpolation and cubic spline interpolation.

5. The brightness compensation method of a display panel according to claim 1, wherein The to-be-processed image further comprises a plurality of second pixels distributed along a second direction, the plurality of second pixels comprising second binding point pixels, and the second direction intersects the first direction. The method further comprises: determining a plurality of second compensation pixels based on brightness of each of the second pixels and each of the second binding point pixels; for any two adjacent second compensation pixels, obtaining a second interpolation strategy between the two second compensation pixels based on brightness of each of the second pixels located between the two second compensation pixels; compensating brightness of each of the second pixels located between the two second compensation pixels based on brightness compensation data of the two second compensation pixels and the second interpolation strategy.

6. The brightness compensation method of a display panel according to claim 5, wherein, The to-be-processed image further comprises third pixels, the third pixels being pixels of the plurality of first pixels and the plurality of second pixels that are positionally overlapped; and the method further comprises: obtaining a first compensation value and a second compensation value of the third pixel, the first compensation value being a luminance compensation value of the third pixel obtained by the first interpolation strategy, and the second compensation value being a luminance compensation value of the third pixel obtained by the second interpolation strategy; obtaining a third compensation value of the third pixel based on the first compensation value, a first preset weight, the second compensation value and a second preset weight, so as to compensate the luminance of the third pixel by the third compensation value.

7. The brightness compensation method of a display panel according to claim 6, wherein, The obtaining of the third compensation value of the third pixel based on the first compensation value, the first preset weight, the second compensation value and the second preset weight comprises: The third compensation value of the third pixel is obtained by the following formula: wherein, L3 is the third compensation value of the third pixel, δ1 is the first preset weight, L1 is the first compensation value, δ2 is the second preset weight, and L2 is the second compensation value.

8. A luminance compensation device of a display panel, characterized by comprising: The device for compensating the luminance of the edge region comprises: An image acquisition module is configured to acquire a gray scale image of the display panel by a camera, extract a to-be-processed image of the edge region from the gray scale image, and obtain the to-be-processed image of the edge region, wherein the to-be-processed image comprises a plurality of first pixels distributed along a first direction, and the plurality of first pixels comprise first binding point pixels. A compensation pixel determination module is configured to determine a plurality of first compensation pixels based on the luminance of each of the first pixels and each of the first binding point pixels. An interpolation strategy determination module is configured to obtain a first interpolation strategy between any two adjacent first compensation pixels based on the luminance of each of the first pixels between the two first compensation pixels. A luminance compensation module is configured to compensate the luminance of each of the first pixels between the two first compensation pixels based on the luminance compensation data of the two first compensation pixels and the first interpolation strategy.

9. A display device, characterized by The display panel and the processor, wherein the processor compensates the luminance unevenness of the edge region of the display panel by the method in any one of claims 1-7.

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