Display panel crosstalk degree evaluation method and evaluation device

Abstract

The invention discloses a display panel crosstalk degree evaluation method and evaluation device. The evaluation method comprises the following steps: acquiring brightness data of all sub-pixels in a display panel; calculating the average brightness of sub-pixels in each pixel strip extending in the first direction in the display panel; the display panel comprises m pixel strips arranged in the second direction; the first direction and the second direction intersect with each other; m is an integer greater than 1; calculating brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the first m-1 pixel strips and the average brightness of the adjacent pixel strips in the second direction; performing binarization processing on all the brightness gradient data to obtain a gradient characteristic value of each pixel bar in the first m-1 pixel bars; and determining the crosstalk degree of the display panel according to the gradient feature value of each pixel strip in the first (m-1) pixel strips. The crosstalk degree can be matched with visual perception, and reference is provided for optical design of the display panel.

Description

Technical Field

[0001] The present invention relates to the technical field of display panels, and in particular to a method and device for evaluating the crosstalk degree of a display panel. Background Art

[0002] AMOLED (Active Matrix Organic Light-Emitting Diode) is a sub-pixel thin film transistor (TFT) current-driven display module. Due to the design limitations of the panel TFT circuit, one area on the display panel will be affected by another area. When the grayscale display of different areas of the display panel is very different and there are boundary rules, it is easy to cause image distortion and subjectively visible image abnormalities, which is called cross-talk in the industry. End customers will select special test images to evaluate the degree of panel cross-talk, but these evaluation methods often cannot match the subjective visual experience, and there are situations where the objective data is qualified but the subjective experience is unqualified. Summary of the invention

[0003] The present invention provides a method and device for evaluating the crosstalk degree of a display panel, which can match the crosstalk degree with the visual experience and provide a reference for the optical design of the display panel.

[0004] According to one aspect of the present invention, a method for evaluating the crosstalk degree of a display panel is provided, comprising:

[0005] Obtain the brightness data of all sub-pixels in the display panel;

[0006] Calculating an average brightness of sub-pixels in each pixel strip extending in a first direction in the display panel; wherein the display panel includes m pixel strips arranged along a second direction; the first direction and the second direction intersect each other; and m is an integer greater than 1;

[0007] Calculate the brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction;

[0008] Binarize all brightness gradient data to obtain the gradient feature value of each pixel in the first m-1 pixel strips;

[0009] The crosstalk degree of the display panel is determined according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips; wherein the gradient characteristic value is positively correlated with the visual crosstalk degree.

[0010] Optionally, the first direction is a row direction of sub-pixels in the display panel, and the second direction is a column direction of sub-pixels in the display panel;

[0011] Calculating brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction, including:

[0012] Calculate the difference in average brightness of two adjacent rows of sub-pixels in the column direction to obtain the brightness gradient data of each pixel row in the first m-1 rows;

[0013] Alternatively, the first direction is a column direction of sub-pixels in the display panel, and the second direction is a row direction of sub-pixels in the display panel;

[0014] Calculating brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction, including:

[0015] According to the row direction, the difference in average brightness of sub-pixels in two adjacent columns is calculated in turn to obtain the brightness gradient data of each pixel column in the first m-1 columns.

[0016] Optionally, all brightness gradient data are binarized to obtain the gradient feature value of each pixel strip in the first m-1 pixel strips, including:

[0017] Calculate the average brightness gradient based on the brightness gradient data of the first m-1 pixel strips;

[0018] Calculate the brightness crosstalk contrast value according to the product of the brightness gradient average value and the preset coefficient;

[0019] The gradient characteristic value of each pixel strip in the first m-1 pixel strips is determined according to the difference between the brightness gradient data of each pixel strip in the first m-1 pixel strips and the brightness crosstalk contrast value.

[0020] Optionally, calculating the brightness gradient average value according to the brightness gradient data of the first m-1 pixel strips includes:

[0021] Calculate the brightness gradient average value according to the brightness gradient data of each pixel strip in the 2nd to m-2nd pixel strips;

[0022] Determine the gradient characteristic value of each pixel strip in the first m-1 pixel strips according to the difference between the brightness gradient data of each pixel strip in the first m-1 pixel strips and the brightness crosstalk contrast value, including:

[0023] When the difference between the brightness gradient data of a pixel strip in the current m-1 pixel strips and the brightness crosstalk contrast value is greater than or equal to 0, the absolute value of the brightness gradient data of the pixel strip is used as the gradient characteristic value of the pixel strip;

[0024] When the difference between the brightness gradient data of a pixel strip in the current m-1 pixel strips and the brightness crosstalk contrast value is less than 0, the gradient characteristic value of the pixel strip is set to zero.

[0025] Optionally, determining the crosstalk degree of the display panel according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips includes:

[0026] When the gradient characteristic value is less than 0.01, it is determined that the display screen of the display panel does not have visual crosstalk;

[0027] When the gradient characteristic value is greater than 0.03, it is determined that visual crosstalk occurs in the display picture of the display panel.

[0028] Optionally, the brightness data of all sub-pixels in the display panel is obtained, including:

[0029] The display panel is photographed by an industrial camera to obtain the brightness data of all sub-pixels in the display panel.

[0030] According to another aspect of the present invention, there is provided a device for evaluating the crosstalk degree of a display panel, comprising:

[0031] A data acquisition module, used to acquire brightness data of all sub-pixels in the display panel;

[0032] A first calculation module is used to calculate the average brightness of sub-pixels in each pixel strip extending in a first direction in the display panel; wherein the display panel includes m pixel strips arranged along a second direction; the first direction and the second direction intersect each other; and m is an integer greater than 1;

[0033] A second calculation module, used for calculating the brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction;

[0034] The data processing module is used to perform binarization processing on all brightness gradient data to obtain the gradient characteristic value of each pixel strip in the first m-1 pixel strips;

[0035] The crosstalk degree determination module is used to determine the crosstalk degree of the display panel according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips; wherein the gradient characteristic value is positively correlated with the visual crosstalk degree.

[0036] Optionally, the first direction is a row direction of sub-pixels in the display panel, and the second direction is a column direction of sub-pixels in the display panel;

[0037] The second calculation module is also used to calculate the difference in average brightness of two adjacent rows of sub-pixels in the column direction, and obtain brightness gradient data of each pixel row in the first m-1 rows;

[0038] Alternatively, the first direction is a column direction of sub-pixels in the display panel, and the second direction is a row direction of sub-pixels in the display panel;

[0039] The second calculation module is also used to calculate the difference in average brightness of sub-pixels in two adjacent columns in the row direction, and obtain brightness gradient data of each pixel column in the first m-1 columns.

[0040] Optionally, the data processing module includes:

[0041] A first calculation unit, used for calculating a brightness gradient average value according to brightness gradient data of pixel strips in the first m-1 pixel strips;

[0042] A second calculation unit, used to calculate a brightness crosstalk contrast value according to a product of a brightness gradient average value and a preset coefficient;

[0043] The gradient feature determination unit is used to determine the gradient feature value of each pixel strip in the first m-1 pixel strips according to the difference between the brightness gradient data of each pixel strip in the first m-1 pixel strips and the brightness crosstalk contrast value.

[0044] Optionally, the first calculation unit is further used to calculate the brightness gradient average value according to the brightness gradient data of each pixel strip in the 2nd to m-2th pixel strips;

[0045] The gradient feature determination unit includes:

[0046] A first gradient feature determination subunit is used for, when the difference between the brightness gradient data of a pixel strip in the current m-1 pixel strips and the brightness crosstalk contrast value is greater than or equal to 0, taking the absolute value of the brightness gradient data of the pixel strip as the gradient feature value of the pixel strip;

[0047] The second gradient feature determination subunit is used to set the gradient feature value of a pixel strip among the current m-1 pixel strips to zero when the difference between the brightness gradient data of the pixel strip and the brightness crosstalk contrast value is less than 0.

[0048] The embodiment of the present invention provides a method for evaluating the crosstalk degree of a display panel, comprising: obtaining brightness data of all sub-pixels in the display panel; calculating the average brightness of sub-pixels in each pixel strip extending in the first direction in the display panel; wherein the display panel comprises m pixel strips arranged along the second direction; the first direction and the second direction intersect each other; m is an integer greater than 1; calculating the brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction; binarizing all the brightness gradient data to obtain the gradient characteristic value of each pixel strip in the first m-1 pixel strips; determining the crosstalk degree of the display panel according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips; wherein the gradient characteristic value is positively correlated with the visual crosstalk degree. The present invention can determine the visual crosstalk degree by the size of the gradient characteristic value, and quantify the influence of the crosstalk picture on the overall brightness of the display panel by calculation, so that the crosstalk degree can be matched with the visual perception, providing a reference for the optical design of the display panel.

[0049] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0051] Figure 1 is a flow chart of a method for evaluating the crosstalk degree of a display panel provided in the first embodiment of the present invention;

[0052] Figure 2 is a brightness data diagram of the crosstalk degree of a display panel provided in the first embodiment of the present invention;

[0053] Figure 3 This Figure 1 A detailed flow chart included in step 140;

[0054] Figure 4 is a gradient data diagram of the crosstalk degree of a display panel provided in the first embodiment of the present invention;

[0055] Figure 5 is another brightness data diagram showing the crosstalk degree of a display panel provided in the first embodiment of the present invention;

[0056] Figure 6is a gradient data diagram of the crosstalk degree of a display panel provided in the first embodiment of the present invention;

[0057] Figure 7 This is a normal screen image of a display panel provided by the first embodiment of the present invention;

[0058] Figure 8 This is a crosstalk picture diagram of a display panel provided by the first embodiment of the present invention;

[0059] Fig. 9 This is another normal screen image of a display panel provided by the first embodiment of the present invention;

[0060] Fig.10 This is another crosstalk screen diagram of a display panel provided in the first embodiment of the present invention;

[0061] Fig.11 It is a schematic diagram of a device for evaluating the crosstalk degree of a display panel provided in a second embodiment of the present invention. DETAILED DESCRIPTION

[0062] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0063] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0064] Embodiment 1

[0065] An embodiment of the present invention provides a method for evaluating the crosstalk degree of a display panel. Figure 1 is a flow chart of a method for evaluating the crosstalk degree of a display panel provided in the first embodiment of the present invention, with reference to Figure 1 , the evaluation methods include:

[0066] Step 110: Obtain brightness data of all sub-pixels in the display panel.

[0067] The display panel may be an active matrix organic light emitting diode panel (AMOLED Panel), and a specific grayscale image may be captured by an industrial camera. For example, the specific grayscale image may be a W255 image, and the brightness data of all sub-pixels in the display panel may be obtained. Figure 2 is a brightness data diagram of a display panel crosstalk degree provided by the first embodiment of the present invention, referring to Figure 2 , Figure 2 The data in is the brightness data of W255 taken for the first sample. The figure includes brightness data of normal picture and crosstalk picture. In the crosstalk brightness data, the brightness data in the dotted circle is visually seen as a bright line, which is 1.4% higher than the normal brightness data. The brightness data in the solid circle is visually seen as a dark line, which is -1.9% higher than the normal brightness data.

[0068] Step 120, calculating the average brightness of sub-pixels in each pixel strip extending in the first direction in the display panel; wherein the display panel includes m pixel strips arranged along the second direction; the first direction and the second direction intersect each other; and m is an integer greater than 1.

[0069] Among them, reference Figure 2 , the first direction can be the row direction or the column direction. If the first direction is the row direction and the second direction is the column direction, then Figure 2 The horizontal axis in is the row position, Figure 2 The horizontal axis in represents 1600 rows. If the first direction is the column direction and the second direction is the row direction, then Figure 2 The horizontal axis in is the column position, Figure 2 The horizontal axis in represents 1600 columns, and the vertical axis represents brightness data. Based on the brightness data of all sub-pixels in the display panel, the brightness data of each row or column can be obtained, and the brightness data of each row or column can be averaged, and the brightness data in the row direction or column direction can be smoothed to eliminate the random noise influence at the pixel level.

[0070] Step 130 : Calculate the brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction.

[0071] Among them, if f(x) is the average brightness of the x-th pixel bar, 1<x≤m-1, f(x+1) is the average brightness of the x+1-th pixel bar, the x-th pixel bar and the x+1-th pixel bar are adjacent pixel bars, then the brightness gradient data of the x-th bar is the difference between f(x+1) and f(x).

[0072] Step 140: Binarize all brightness gradient data to obtain the gradient feature value of each pixel strip in the first m-1 pixel strips.

[0073] Among them, by binarizing all brightness gradient data, the gradient characteristic value of each pixel strip in the first m-1 pixel strips can be calculated. If the binarization process is performed, the unclear crosstalk picture in the display panel can be eliminated, and only the picture data with obvious crosstalk can be displayed.

[0074] Step 150: Determine the crosstalk degree of the display panel according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips; wherein the gradient characteristic value is positively correlated with the visual crosstalk degree.

[0075] Among them, the degree of crosstalk of the panel can be determined according to the size of the gradient eigenvalue. The gradient eigenvalue can be zero or non-zero. If the gradient eigenvalue is set to zero, the crosstalk of the display panel is not obvious. If the gradient eigenvalue is not zero, the crosstalk of the display panel is obvious. By determining the degree of visual crosstalk through the size of the gradient eigenvalue, the degree of crosstalk can be matched with the visual perception, providing a reference for the optical design of the display panel.

[0076] The embodiment of the present invention provides a method for evaluating the crosstalk degree of a display panel, comprising: obtaining brightness data of all sub-pixels in the display panel; calculating the average brightness of sub-pixels in each pixel strip extending in the first direction in the display panel; wherein the display panel comprises m pixel strips arranged along the second direction; the first direction and the second direction intersect each other; m is an integer greater than 1; calculating the brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction; binarizing all the brightness gradient data to obtain the gradient characteristic value of each pixel strip in the first m-1 pixel strips; determining the crosstalk degree of the display panel according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips; wherein the gradient characteristic value is positively correlated with the visual crosstalk degree. The present invention can determine the visual crosstalk degree by the size of the gradient characteristic value, and quantify the influence of the crosstalk picture on the overall brightness of the display panel by calculation, so that the crosstalk degree can be matched with the visual perception, providing a reference for the optical design of the display panel.

[0077] Optionally, the first direction is the row direction of the sub-pixels in the display panel, and the second direction is the column direction of the sub-pixels in the display panel; the brightness gradient data of each pixel bar in the first m-1 pixel bars are calculated based on the average brightness of each pixel bar in the m pixel bars and the average brightness of the adjacent pixel bar in the second direction, including: according to the column direction, the difference between the average brightness of two adjacent rows of sub-pixels is calculated in sequence to obtain the brightness gradient data of each pixel row in the first m-1 rows.

[0078] Alternatively, the first direction is the column direction of the sub-pixels in the display panel, and the second direction is the row direction of the sub-pixels in the display panel; the brightness gradient data of each pixel bar in the first m-1 pixel bars are calculated based on the average brightness of each pixel bar in the m pixel bars and the average brightness of the adjacent pixel bars in the second direction, including: according to the row direction, the difference between the average brightness of sub-pixels in two adjacent columns is calculated in sequence to obtain the brightness gradient data of each pixel column in the first m-1 columns.

[0079] Among them, the brightness gradient data can be represented by f'(x). If f(x) is the average brightness of the x-th pixel bar, 1<x≤m-1, f(x+1) is the average brightness of the x+1-th pixel bar, and the x-th pixel bar and the x+1-th pixel bar are adjacent pixel bars, then f'(x)=f(x+1)-f(x).

[0080] Optional, Figure 3 This Figure 1 A detailed flow chart included in step 140, refer to Figure 3 ,

[0081] Step 140: Binarize all brightness gradient data to obtain the gradient feature value of each pixel strip in the first m-1 pixel strips, including:

[0082] Step 141: Calculate the brightness gradient average value based on the brightness gradient data of the first m-1 pixel strips.

[0083] Among them, since the data at the edge of the display panel is inaccurate, the overall calculation may affect the accuracy of the brightness gradient average value. Therefore, the edge data of the 1st and m-1th strips are removed, and the brightness gradient average value can be calculated based on the brightness gradient data of each pixel strip in the 2nd to m-2th pixel strips.

[0084] Step 142: Calculate the brightness crosstalk contrast value according to the product of the brightness gradient average value and the preset coefficient.

[0085] Among them, the preset coefficient can be 3 according to the experiment, the brightness gradient average value can be ave, and the brightness crosstalk contrast value can be 3ave, so it can be calculated by the formula Wherein, m represents m pixel strips, and f'(x) represents brightness gradient data.

[0086] Step 143: Determine the gradient characteristic value of each pixel strip in the first m-1 pixel strips according to the difference between the brightness gradient data of each pixel strip in the first m-1 pixel strips and the brightness crosstalk contrast value.

[0087] Among them, when the difference between the brightness gradient data of a pixel strip in the current m-1 pixel strips and the brightness crosstalk contrast value is greater than or equal to 0, the absolute value of the brightness gradient data of the pixel strip is used as the gradient characteristic value of the pixel strip; when the difference between the brightness gradient data of a pixel strip in the current m-1 pixel strips and the brightness crosstalk contrast value is less than 0, the gradient characteristic value of the pixel strip is set to zero. Figure 4 is a gradient data diagram of the crosstalk degree of a display panel provided in the first embodiment of the present invention, Figure 4 The horizontal axis in is the row position, which represents the row number of the sub-pixel, or Figure 4 The horizontal axis in is the column position, which represents the column number of the sub-pixel, and the vertical axis is the gradient data. Figure 4 The data in the figure are the W255 gradient data of the first sample, taken from Figure 4 It can be seen that the normal gradient data are all set to zero, indicating that there is no crosstalk in the visual perception of the display panel. In the crosstalk gradient data, the gradient data in the dotted circle is 0.039, and the gradient eigenvalue is 0.039. The gradient data in the solid circle is -0.073, and the gradient eigenvalue is 0.073, indicating that there is a crosstalk picture in the visual perception of the display panel.

[0088] Optionally, step 150, determining the crosstalk degree of the display panel according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips, includes:

[0089] When the gradient characteristic value is less than 0.01, it is determined that the display screen of the display panel does not have visual crosstalk.

[0090] When the gradient characteristic value is greater than 0.03, it is determined that visual crosstalk occurs in the display picture of the display panel.

[0091] in, Figure 5 is another brightness data diagram showing the crosstalk degree of a display panel provided in the first embodiment of the present invention. Figure 6 is a gradient data diagram of the crosstalk degree of a display panel provided in the first embodiment of the present invention, referring to Figure 5 and Figure 6 , Figure 5 and Figure 6 The data in is the brightness data and gradient data of W255 taken for the second sample. Figure 5 The luminance data of normal picture and crosstalk picture are included. Figure 6 The gradient data graphs including the normal picture and the crosstalk picture; Figure 5 and Figure 6 The horizontal axis in is the number of rows of sub-pixels, or Figure 5 and Figure 6 The horizontal axis in is the number of sub-pixel columns, and the vertical axis is the gradient data. In the crosstalk brightness data, Figure 5The brightness data within the middle dotted circle is visually seen as a weak bright line, which is 0.8% higher than the normal brightness data. Figure 6 The gradient data in is binarized, and Figure 6 It can be seen that Figure 6 The maximum gradient data in the dashed circle is the gradient data, the gradient data in the dashed circle is -0.007, and the gradient eigenvalue is 0.007. Therefore, it can be explained that when the gradient eigenvalue is less than 0.01, it is determined that the display screen of the display panel does not have visual crosstalk, and the visual experience is not obvious. Figure 4 ,exist Figure 4 The gradient data in the middle dotted circle is 0.039, and the gradient eigenvalue is 0.039. The gradient data in the solid circle is -0.073, and the gradient eigenvalue is 0.073. Therefore, it can be explained that when the gradient eigenvalue is greater than 0.03, it is determined that visual crosstalk occurs in the display screen of the display panel, and the visual experience is obvious.

[0092] Optionally, the brightness data of all sub-pixels in the display panel is obtained, including: photographing the display panel with an industrial camera to obtain the brightness data of all sub-pixels in the display panel.

[0093] in, Figure 7 is a normal screen image of a display panel provided by the first embodiment of the present invention, Figure 8 is a crosstalk picture of a display panel provided in the first embodiment of the present invention, with reference to Figure 7 and Figure 8 , Figure 7 To take the W255 normal picture of the first sample, Figure 8 This is a W255 crosstalk image of the first sample, where the center 10 of the image is set to 0 grayscale and the rest is W255. Figure 8 The gradient characteristic value of the medium crosstalk picture is greater than 0.03, and the display picture of the display panel has visual crosstalk, and the visual experience is obvious; Fig. 9 is a normal screen image of another display panel provided in the first embodiment of the present invention. Fig.10 is another crosstalk picture of a display panel provided in the first embodiment of the present invention. Fig. 9 To shoot the "second sample W255 normal picture, Fig.10 The W255 crosstalk picture of the second sample is taken, wherein the center 20 of the picture is set to 0 grayscale, and the rest is W255. Fig.10 The gradient characteristic value of the medium crosstalk picture is less than 0.01, the display picture of the display panel does not have visual crosstalk, and the visual experience is not obvious.

[0094] Embodiment 2

[0095] Based on the above embodiments, the present invention provides a device for evaluating the crosstalk degree of a display panel. Fig.11is a schematic diagram of a device for evaluating the crosstalk degree of a display panel provided in a second embodiment of the present invention, with reference to Fig.11 , the evaluation device includes:

[0096] The data acquisition module 210 is used to acquire the brightness data of all sub-pixels in the display panel;

[0097] A first calculation module 220 is used to calculate the average brightness of sub-pixels in each pixel strip extending in the first direction in the display panel; wherein the display panel includes m pixel strips arranged along the second direction; the first direction and the second direction intersect each other; m is an integer greater than 1;

[0098] A second calculation module 230, configured to calculate brightness gradient data of each pixel strip in the first m-1 pixel strips according to an average brightness of each pixel strip in the m pixel strips and an average brightness of adjacent pixel strips in the second direction;

[0099] The data processing module 240 is used to perform binarization processing on all brightness gradient data to obtain the gradient characteristic value of each pixel strip in the first m-1 pixel strips;

[0100] The crosstalk degree determination module 250 is used to determine the crosstalk degree of the display panel according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips; wherein the gradient characteristic value is positively correlated with the visual crosstalk degree.

[0101] Optionally, the first direction is a row direction of sub-pixels in the display panel, and the second direction is a column direction of sub-pixels in the display panel;

[0102] The second calculation module is also used to calculate the difference in average brightness of two adjacent rows of sub-pixels in the column direction, and obtain brightness gradient data of each pixel row in the first m-1 rows;

[0103] Alternatively, the first direction is a column direction of sub-pixels in the display panel, and the second direction is a row direction of sub-pixels in the display panel;

[0104] The second calculation module is also used to calculate the difference in average brightness of sub-pixels in two adjacent columns in the row direction, and obtain brightness gradient data of each pixel column in the first m-1 columns.

[0105] Optionally, the data processing module includes:

[0106] A first calculation unit is used to calculate a brightness gradient average value according to brightness gradient data of pixel strips in the first m-1 pixel strips;

[0107] A second calculation unit, used to calculate a brightness crosstalk contrast value according to a product of a brightness gradient average value and a preset coefficient;

[0108] The gradient feature determination unit is used to determine the gradient feature value of each pixel strip in the first m-1 pixel strips according to the difference between the brightness gradient data of each pixel strip in the first m-1 pixel strips and the brightness crosstalk contrast value.

[0109] Optionally, the first calculation unit is further used to calculate the brightness gradient average value according to the brightness gradient data of each pixel strip in the 2nd to m-2th pixel strips;

[0110] The gradient feature determination unit includes:

[0111] A first gradient feature determination subunit is used for, when the difference between the brightness gradient data of a pixel strip in the current m-1 pixel strips and the brightness crosstalk contrast value is greater than or equal to 0, taking the absolute value of the brightness gradient data of the pixel strip as the gradient feature value of the pixel strip;

[0112] The second gradient feature determination subunit is used to set the gradient feature value of a pixel strip among the current m-1 pixel strips to zero when the difference between the brightness gradient data of the pixel strip and the brightness crosstalk contrast value is less than 0.

[0113] Optionally, the crosstalk degree determination module includes:

[0114] A first crosstalk degree determination unit, configured to determine that no visual crosstalk occurs in a display image of the display panel when the gradient characteristic value is less than 0.01;

[0115] The second crosstalk degree determination unit is used to determine that visual crosstalk occurs in the display picture of the display panel when the gradient characteristic value is greater than 0.03.

[0116] Optionally, the data acquisition module is further used to acquire brightness data of all sub-pixels in the display panel by photographing the display panel with an industrial camera.

[0117] The beneficial effects of the evaluation device provided by the embodiment of the present invention are consistent with the beneficial effects of the evaluation method provided by any embodiment of the present invention.

[0118] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0119] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for evaluating the crosstalk degree of a display panel, characterized in that: include: Obtain the brightness data of all sub-pixels in the display panel; Calculating an average brightness of sub-pixels in each pixel strip extending in a first direction in the display panel; The display panel includes m pixel strips arranged along a second direction; the first direction and the second direction intersect each other; m is an integer greater than 1; Calculate the brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction; Binarize all brightness gradient data to obtain the gradient feature value of each pixel in the first m-1 pixel strips; The crosstalk degree of the display panel is determined according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips; wherein the gradient characteristic value is positively correlated with the visual crosstalk degree.

2. The evaluation method according to claim 1, characterized in that: The first direction is a row direction of sub-pixels in the display panel, and the second direction is a column direction of sub-pixels in the display panel; Calculating brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction, including: Calculate the difference in average brightness of two adjacent rows of sub-pixels in the column direction to obtain the brightness gradient data of each pixel row in the first m-1 rows; Alternatively, the first direction is a column direction of sub-pixels in the display panel, and the second direction is a row direction of sub-pixels in the display panel; Calculating brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction, including: According to the row direction, the difference in average brightness of sub-pixels in two adjacent columns is calculated in turn to obtain the brightness gradient data of each pixel column in the first m-1 columns.

3. The evaluation method according to claim 1, characterized in that: Binarize all brightness gradient data to obtain the gradient feature value of each pixel in the first m-1 pixel strips, including: Calculate the average brightness gradient based on the brightness gradient data of the first m-1 pixel strips; Calculate the brightness crosstalk contrast value according to the product of the brightness gradient average value and the preset coefficient; The gradient characteristic value of each pixel strip in the first m-1 pixel strips is determined according to the difference between the brightness gradient data of each pixel strip in the first m-1 pixel strips and the brightness crosstalk contrast value.

4. The evaluation method according to claim 3, characterized in that: Calculating the average brightness gradient based on the brightness gradient data of the first m-1 pixel strips includes: Calculate the brightness gradient average value according to the brightness gradient data of each pixel strip in the 2nd to m-2nd pixel strips; Determine the gradient characteristic value of each pixel strip in the first m-1 pixel strips according to the difference between the brightness gradient data of each pixel strip in the first m-1 pixel strips and the brightness crosstalk contrast value, including: When the difference between the brightness gradient data of a pixel strip in the current m-1 pixel strips and the brightness crosstalk contrast value is greater than or equal to 0, the absolute value of the brightness gradient data of the pixel strip is used as the gradient characteristic value of the pixel strip; When the difference between the brightness gradient data of a pixel strip in the current m-1 pixel strips and the brightness crosstalk contrast value is less than 0, the gradient characteristic value of the pixel strip is set to zero.

5. The evaluation method according to claim 1, characterized in that: Determining the crosstalk degree of the display panel according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips includes: When the gradient characteristic value is less than 0.01, it is determined that the display screen of the display panel does not have visual crosstalk; When the gradient characteristic value is greater than 0.03, it is determined that visual crosstalk occurs in the display picture of the display panel.

6. The evaluation method according to claim 1, characterized in that: Get the brightness data of all sub-pixels in the display panel, including: The display panel is photographed by an industrial camera to obtain the brightness data of all sub-pixels in the display panel.

7. A device for evaluating the crosstalk degree of a display panel, characterized in that: include: A data acquisition module, used to acquire brightness data of all sub-pixels in the display panel; A first calculation module, used for calculating an average brightness of sub-pixels in each pixel strip extending in a first direction in the display panel; The display panel includes m pixel strips arranged along a second direction; the first direction and the second direction intersect each other; m is an integer greater than 1; A second calculation module, used for calculating the brightness gradient data of each pixel strip in the first m-1 pixel strips according to the average brightness of each pixel strip in the m pixel strips and the average brightness of the adjacent pixel strips in the second direction; The data processing module is used to perform binarization processing on all brightness gradient data to obtain the gradient characteristic value of each pixel strip in the first m-1 pixel strips; The crosstalk degree determination module is used to determine the crosstalk degree of the display panel according to the gradient characteristic value of each pixel strip in the first m-1 pixel strips; wherein the gradient characteristic value is positively correlated with the visual crosstalk degree.

8. The evaluation device according to claim 7, characterized in that The first direction is a row direction of sub-pixels in the display panel, and the second direction is a column direction of sub-pixels in the display panel; The second calculation module is also used to calculate the difference in average brightness of two adjacent rows of sub-pixels in the column direction, and obtain brightness gradient data of each pixel row in the first m-1 rows; Alternatively, the first direction is a column direction of sub-pixels in the display panel, and the second direction is a row direction of sub-pixels in the display panel; The second calculation module is also used to calculate the difference in average brightness of sub-pixels in two adjacent columns in the row direction, and obtain brightness gradient data of each pixel column in the first m-1 columns.

9. The evaluation device according to claim 7, characterized in that: The data processing module includes: A first calculation unit, used for calculating a brightness gradient average value according to brightness gradient data of pixel strips in the first m-1 pixel strips; A second calculation unit, used to calculate a brightness crosstalk contrast value according to a product of a brightness gradient average value and a preset coefficient; The gradient feature determination unit is used to determine the gradient feature value of each pixel strip in the first m-1 pixel strips according to the difference between the brightness gradient data of each pixel strip in the first m-1 pixel strips and the brightness crosstalk contrast value.

10. The evaluation device according to claim 7, characterized in that: The first calculation unit is also used to calculate the brightness gradient average value according to the brightness gradient data of each pixel strip in the 2nd to m-2nd pixel strips; The gradient feature determination unit includes: A first gradient feature determination subunit is configured to, when the difference between the brightness gradient data of a pixel strip in the current m-1 pixel strips and the brightness crosstalk contrast value is greater than or equal to 0, use the absolute value of the brightness gradient data of the pixel strip as the gradient feature value of the pixel strip; The second gradient feature determination subunit is used to set the gradient feature value of a pixel strip among the current m-1 pixel strips to zero when the difference between the brightness gradient data of the pixel strip and the brightness crosstalk contrast value is less than 0.

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