Color deviation detection method and system for display device

Abstract

The present application provides a color deviation detection method and system for a display device, relating to the technical field of color deviation detection, and is used to solve the technical problem of low accuracy of existing color deviation detection methods. The color deviation detection method includes: controlling the display device to display a test screen of a single color; acquiring a captured image of the test screen, where the captured image includes a flat display area image corresponding to the flat display area and a curved display area image corresponding to the curved display area; selecting at least one first image area and at least one second image area in the captured image, the first image area being located in the flat display area image and the second image area being located in the curved display area image; acquiring a first color deviation parameter of the first image area and a second color deviation parameter of the second image area; and obtaining a color deviation detection result of the display device according to the first color deviation parameter and the second color deviation parameter. This method can improve the accuracy of the obtained color deviation detection result of the display device.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a method and system for detecting color deviation of a display device. Background Art

[0002] As a current-driven light-emitting device, an Organic Light Emitting Diode (OLED for short) has been widely used in display devices such as mobile phones and tablet computers because of its self-luminescence, fast response, wide viewing angle, and the ability to be fabricated on flexible substrates.

[0003] In order to improve the display effect and user experience, display devices generally adopt a curved screen design. In the display state of a display device with a curved screen design, color deviation occurs in its curved display area. During the design, production, etc. of a display device, it is necessary to evaluate the degree of color deviation of the display device.

[0004] However, in the related art, the evaluation result of the degree of color deviation of a display device is not accurate enough to truly reflect the degree of color deviation of the display device. Summary of the Invention

[0005] In view of the above problems, embodiments of this application provide a method and system for detecting color deviation of a display device, which can improve the accuracy of detecting color deviation of a display device.

[0006] To achieve the above object, embodiments of this application provide the following technical solutions:

[0007] A first aspect of embodiments of this application provides a method for detecting color deviation of a display device. The display device has a connected flat display area and a curved display area. The color deviation detection method includes: controlling the display device to display a test picture of a single color; obtaining a captured image of the test picture, where the captured image includes a flat display area image corresponding to the flat display area and a curved display area image corresponding to the curved display area; selecting at least one first image area and at least one second image area in the captured image, where the first image area is located in the flat display area image and the second image area is located in the curved display area image; obtaining a first color deviation parameter of the first image area and a second color deviation parameter of the second image area; and obtaining a color deviation detection result of the display device according to the first color deviation parameter and the second color deviation parameter.

[0008] In the color deviation detection method of the display device provided by the embodiment of the present application, a captured image of the test screen of the display device is obtained. A first image area is selected from the flat display area image of the captured image, and a second image area is selected from the curved display area image of the captured image. And a color deviation detection result of the display device is obtained according to the first color deviation parameter of the first image area and the second color deviation parameter of the second image area. Since the first image area and the second image area are selected from the captured image of the test screen, the selection positions of the first image area and the second image area are more accurate, ensuring that the first image area is selected from the flat display area image corresponding to the flat display area, and the second image area is selected from the curved display area image corresponding to the curved display area. Thereby enabling the first color deviation parameter to accurately reflect the display condition of the flat display area of the display device, and the second color deviation parameter to accurately reflect the display condition of the curved display area of the display device, and further improving the accuracy of the color deviation detection result of the display device obtained according to the first color deviation parameter and the second color deviation parameter.

[0009] In a possible implementation manner, the captured image includes a first captured image, and the shooting direction of the first captured image is perpendicular to the flat display area; the color deviation detection result includes a first color deviation evaluation parameter X1, and the first color deviation evaluation parameter X1 is calculated according to the first color deviation parameter of the first image area and the second color deviation parameter of the second image area obtained from the first captured image. The first color deviation evaluation parameter X1 is used to characterize the color deviation degree of the display device in the front view angle.

[0010] The color deviation detection result obtained from the first captured image can reflect the color deviation condition of the display device in the front view angle (that is, when the user is directly facing the flat display area of the display device).

[0011] In a possible implementation manner, the curved display area is disposed on opposite sides of the flat display area, and the curved display area image of the first captured image is located on both sides of the flat display area image; in the first captured image, a part of the image in the flat display area image is selected as the first image area, and a part of the images in the curved display area images on both sides are respectively selected as the second image areas. Both the first image area and the second image area are strip-shaped, and both the first image area and the second image area extend along a first direction, and the first direction is parallel to the extension direction of the curved display area image.

[0012] Setting the first image area and the second image area in the first captured image as strip-shaped can not only better reflect the color deviation-related parameters of each image area, but also reduce the calculation amount of the color deviation evaluation parameter.

[0013] In a possible implementation, in the first captured image, the width of the second image area is less than the width of the image in the curved display area where it is located. The fact that the width of the second image area is less than the width of the image in the curved display area where it is located reduces the amount of computation on the one hand and can avoid the second image area capturing an image outside the image in the curved display area on the other hand, ensuring the accuracy of the obtained color cast detection result.

[0014] In a possible implementation, the first color cast parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the first image area, and the second color cast parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the second image area. The first color cast parameter and the second color cast parameter correspond to each other; the number of the first image areas is one, and the calculation formula for the first color cast evaluation parameter X1 is: X1 = |R1 - R| + |R2 - R|; or, X1 = Max(|R1 - R|, |R2 - R|); or, X1 = (|R1 - R| + |R2 - R|) / R; or, X1 = Max(|R1 - R| / R, |R2 - R| / R); where R is the parameter value of the first color cast parameter of the first image area in the first captured image; R1 is the parameter value of the second color cast parameter of the second image area on one side in the first captured image; R2 is the parameter value of the second color cast parameter of the second image area on the other side in the first captured image; or, the number of the first image areas is two, and the two first image areas are respectively arranged close to the second image areas on both sides. The calculation formula for the first color cast evaluation parameter X1 is: X1 = |R1 - R3| + |R2 - R4|; or, X1 = Max(|R1 - R3|, |R2 - R4|); or, X1 = (|R 1- R3|) / R3 + (|R2 - R4|) / R4; or, X1 = Max(|R1 - R3| / R3, |R2 - R4| / R4); where R1 and R3 are respectively the parameter value of the second color cast parameter of the second image area on one side in the first captured image and the parameter value of the first color cast parameter of the first image area arranged close to the second image area on one side; R2 and R4 are respectively the parameter value of the second color cast parameter of the second image area on the other side in the first captured image and the parameter value of the first color cast parameter of the first image area arranged close to the second image area on the other side.

[0015] By comparing the parameter values of the color deviation parameters of the first image area and the second image area in the first captured image, the color deviation evaluation parameter can be obtained. The calculation method is simple, which improves the operation speed. When the number of the first image areas is two, when comparing the color deviation parameters of the first image area and the second image area, the color deviation parameters of the first image area and the second image area close to it are compared, so as to obtain a more accurate color deviation detection result.

[0016] In a possible implementation manner, the first color deviation parameter includes the color coordinates of the first image area, and the second color deviation parameter includes the color coordinates of the second image area; the number of the first image areas is one, and the calculation formula of the first color deviation evaluation parameter X1 is:

[0017] Or,

[0018]

[0019] Where x is the abscissa coordinate value of the color coordinates of the first image area in the first captured image; x1 is the abscissa coordinate value of the color coordinates of the second image area on one side in the first captured image; x2 is the abscissa coordinate value of the color coordinates of the second image area on the other side in the first captured image; y is the ordinate coordinate value of the color coordinates of the first image area in the first captured image; y1 is the ordinate coordinate value of the color coordinates of the second image area on one side in the first captured image; y2 is the ordinate coordinate value of the color coordinates of the second image area on the other side in the first captured image; or, the number of the first image areas is two, and the two first image areas are respectively arranged close to the second image areas on both sides, and the calculation formula of the first color deviation evaluation parameter X1 is:

[0020] Or,

[0021]

[0022] Wherein, x1 and x3 are respectively the abscissa coordinate values of the color coordinates of the second image area on one side in the first captured image and the abscissa coordinate values of the color coordinates of the first image area arranged close to the second image area on one side; x2 and x4 are respectively the abscissa coordinate values of the color coordinates of the second image area on the other side in the first captured image and the abscissa coordinate values of the color coordinates of the first image area arranged close to the second image area on the other side; y1 and y3 are respectively the ordinate coordinate values of the color coordinates of the second image area on one side in the first captured image and the ordinate coordinate values of the color coordinates of the first image area arranged close to the second image area on one side; y2 and y4 are respectively the ordinate coordinate values of the color coordinates of the second image area on the other side in the first captured image and the ordinate coordinate values of the color coordinates of the first image area arranged close to the second image area on the other side.

[0023] By calculating the horizontal coordinate variance and vertical coordinate variance of the first image area and the second image area in the first captured image to obtain the color deviation evaluation parameter, it can more accurately reflect the color deviation situation between the two image areas, thereby obtaining a more accurate color deviation detection result.

[0024] In a possible implementation manner, the curved surface display area is arranged on opposite sides of the plane display area, and the curved surface display area images of the first captured image are located on both sides of the plane display area image. In the first captured image, a part of the image in the plane display area image is selected as the first image area, and a part of the images in the curved surface display area images on both sides are respectively selected as the second image areas. There are N first image areas arranged along a first direction, the first direction is parallel to the extension direction of the curved surface display area image, and there are N second image areas on each side arranged along the first direction and corresponding to each of the first image areas one by one, where N is a positive integer greater than or equal to 3.

[0025] Obtaining the color deviation detection result according to the color deviation parameters of the corresponding first image area and second image area in the first captured image can further improve the accuracy of the color deviation detection result.

[0026] In a possible implementation manner, the first color deviation parameter includes the brightness, contrast, abscissa coordinate of the color coordinate, or ordinate coordinate of the color coordinate of the first image area, and the second color deviation parameter includes the brightness, contrast, abscissa coordinate of the color coordinate, or ordinate coordinate of the color coordinate of the second image area; the calculation formula of the first color deviation evaluation parameter X1 is:

[0027] X1 = (|R A1 -R B1 | + |R A1 -R C1 |) + … + (|R Ai -RBi |+|R Ai -R Ci |)+…+(|R AN -R BN |+|R AN -R CN |);

[0028] Among them, along the first direction, R A1 , R Ai , R AN are respectively the parameter values of the first color deviation parameters of the 1st, the ith, and the Nth first image areas in the first captured image, R B1 , R Bi , R BN are respectively the parameter values of the second color deviation parameters of the 1st, the ith, and the Nth second image areas on one side in the first captured image, R C1 , R Ci , R CN are respectively the parameter values of the second color deviation parameters of the 1st, the ith, and the Nth second image areas on the other side in the first captured image, 1 < i < N, and i is a positive integer.

[0029] By comparing the parameter values of the color deviation parameters of the first image area and the second image area in the first captured image, the color deviation evaluation parameter can be obtained. The calculation method is simple, the operation speed is improved, and the color deviation detection result is obtained according to the color deviation parameters of the corresponding first image area and the second image area, which can further improve the accuracy of the color deviation detection result.

[0030] In a possible implementation manner, the first color deviation parameter includes the color coordinates of the first image area, and the second color deviation parameter includes the color coordinates of the second image area; the calculation formula of the first color deviation evaluation parameter X1 is:

[0031]

[0032] Among them, along the first direction, x A1 , x Ai , x AN are respectively the horizontal axis coordinate values of the color coordinates of the 1st, the ith, and the Nth first image areas in the first captured image, y A1 , y Ai , y AN are respectively the vertical axis coordinate values of the color coordinates of the 1st, the ith, and the Nth first image areas in the first captured image, x B1 , x Bi , x BN are respectively the horizontal axis coordinate values of the color coordinates of the 1st, the ith, and the Nth second image areas on one side in the first captured image, y B1 , yBi and y BN are respectively the vertical axis coordinate values of the color coordinates of the 1st, the i-th, and the N-th second image regions on one side in the first captured image, x C1 and x Ci and x CN are respectively the horizontal axis coordinate values of the color coordinates of the 1st, the i-th, and the N-th second image regions on the other side in the first captured image, y C1 and y Ci and y CN are respectively the vertical axis coordinate values of the color coordinates of the 1st, the i-th, and the N-th second image regions on the other side in the first captured image, 1 < i < N, and i is a positive integer.

[0033] By calculating the variance of the abscissa and the variance of the ordinate of the corresponding first image region and second image region in the first captured image to obtain the color deviation evaluation parameter, the accuracy of the color deviation detection result can be further improved.

[0034] In a possible implementation manner, the captured image includes a second captured image, and the shooting direction of the second captured image forms a predetermined angle other than 90° with the plane display area; the color deviation detection result includes a second color deviation evaluation parameter X2, and the second color deviation evaluation parameter X2 is calculated according to the first color deviation parameter of the first image region and the second color deviation parameter of the second image region obtained from the second captured image, and the second color deviation evaluation parameter X2 is used to characterize the color deviation degree of the display device at an inclined viewing angle.

[0035] The color deviation detection result obtained from the second captured image can reflect the color deviation situation of the display device at an inclined viewing angle (that is, the viewing angle of the user is not perpendicular to the plane display area of the display device).

[0036] In a possible implementation, the curved display area is disposed on opposite sides of the flat display area. In the second captured image, a partial image of the flat display area image is selected as the first image area, and a partial image of the curved display area image of the curved display area close to the shooting side is selected as the second image area. Both the first image area and the second image area are strip-shaped, and both the first image area and the second image area extend along a second direction, and the second direction is parallel to the extension direction of the curved display area image; the first color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or the vertical axis coordinate of the color coordinate of the first image area, and the second color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or the vertical axis coordinate of the color coordinate of the second image area. The calculation formula for the second color deviation evaluation parameter X2 is: X2 = |R5 - R6|; or, X2 = |R5 - R6| / R6; where R6 is the parameter value of the first color deviation parameter of the first image area in the second captured image; R5 is the parameter value of the second color deviation parameter of the second image area in the second captured image; or, the first color deviation parameter includes the color coordinate of the first image area, the second color deviation parameter includes the color coordinate of the second image area, and the calculation formula for the second color deviation evaluation parameter X2 is:

[0037]

[0038] where x6 is the horizontal axis coordinate value of the color coordinate of the first image area in the second captured image; y6 is the vertical axis coordinate value of the color coordinate of the first image area in the second captured image; x5 is the horizontal axis coordinate value of the color coordinate of the second image area in the second captured image; y5 is the vertical axis coordinate value of the color coordinate of the second image area in the second captured image.

[0039] By comparing the parameter values of the color deviation parameters of the first image area and the second image area in the second captured image, the color deviation evaluation parameter can be obtained, and the calculation method is simple, which improves the operation speed.

[0040] In a possible implementation, the curved display area is disposed on opposite sides of the flat display area. In the second captured image, a partial image of the flat display area image is selected as the first image area, and a partial image of the curved display area image of the curved display area close to the capture side is selected as the second image area. There are M first image areas arranged along a second direction, the second direction being parallel to the extension direction of the curved display area image. There are M second image areas arranged along the second direction and corresponding to each of the first image areas one by one, where M is a positive integer greater than or equal to 3. The first color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the first image area. The second color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the second image area. The calculation formula for the second color deviation evaluation parameter X2 is: X2 = |R D1 -R E1 | + … + |R Di -R Ei | + … + |R DM -R EM |; where, along the second direction, R D1 、R Di 、R DM are respectively the parameter values of the first color deviation parameter of the 1st, the ith, and the Mth first image areas in the second captured image, R E1 、R Ei 、R EM are respectively the parameter values of the second color deviation parameter of the 1st, the ith, and the Mth second image areas in the second captured image, 1 < i < M, and i is a positive integer; or, the first color deviation parameter includes the color coordinate of the first image area, the second color deviation parameter includes the color coordinate of the second image area, and the calculation formula for the second color deviation evaluation parameter X2 is:

[0041]

[0042] where, along the second direction, x D1 、x Di 、x DM are respectively the horizontal axis coordinate values of the color coordinates of the 1st, the ith, and the Mth first image areas in the second captured image, y D1 、y Di 、y DM are respectively the vertical axis coordinate values of the color coordinates of the 1st, the ith, and the Mth first image areas in the second captured image, x E1 、x Ei 、x EM are respectively the horizontal axis coordinate values of the color coordinates of the 1st, the ith, and the Mth second image areas in the second captured image, yE1 , y Ei , y EM are respectively the vertical axis coordinate values of the color coordinates of the 1st, the i-th, and the M-th second image regions in the second captured image, where 1 < i < M, and i is a positive integer.

[0043] By calculating the horizontal coordinate variance and the vertical coordinate variance of the corresponding first image region and second image region in the second captured image to obtain the color deviation evaluation parameter, the accuracy of the color deviation detection result can be further improved.

[0044] In a possible implementation, the captured image includes a plurality of second captured images with different shooting directions; the color deviation detection result includes a third color deviation evaluation parameter X3, and the third color deviation evaluation parameter X3 is the sum of the first color deviation evaluation parameter X1 and the second color deviation evaluation parameters X2 corresponding to the respective second captured images.

[0045] By acquiring a plurality of second captured images with different shooting directions, the color deviation situation can be more comprehensively reflected, thereby further improving the accuracy of the color deviation detection result.

[0046] In a possible implementation, the display device is controlled to display test screens of a plurality of different single colors. For each test screen of a single color, a third color deviation evaluation parameter X3 is calculated correspondingly. The color deviation detection result includes a fourth color deviation evaluation parameter X4, and the fourth color deviation evaluation parameter X4 is the sum of the respective third color deviation evaluation parameters X3.

[0047] By controlling the display device to display test screens of different colors and respectively shooting the test screens of different colors, the color deviation situation can be more comprehensively reflected, thereby further improving the accuracy of the color deviation detection result.

[0048] A second aspect of the embodiments of the present application provides a color deviation detection system for a display device. The display device has a flat display area and a curved display area. The color deviation detection system includes: a stage for carrying the display device; a display control device for controlling the display device to display a test screen of a single color; a shooting device for shooting the test screen to obtain a captured image; and a processing device for acquiring the captured image, selecting at least one first image region and at least one second image region in the captured image, acquiring a first color deviation parameter of the first image region and a second color deviation parameter of the second image region, and obtaining a color deviation detection result of the display device according to the first color deviation parameter and the second color deviation parameter, where the captured image includes a flat display area image corresponding to the flat display area and a curved display area image corresponding to the curved display area, the first image region is located in the flat display area image, and the second image region is located in the curved display area image.

[0049] In the color deviation detection system of the display device provided by the embodiment of the present application, the photographing device photographs the test screen displayed by the display device to obtain a photographed image. The processing device selects a first image area in the flat display area image of the photographed image, selects a second image area in the curved display area image of the photographed image, and obtains the color deviation detection result of the display device according to the first color deviation parameter of the first image area and the second color deviation parameter of the second image area. Since the first image area and the second image area are obtained from the photographed image of the test image, the acquisition positions of the first image area and the second image area are more accurate, so that the first color deviation parameter can accurately reflect the display situation of the flat display area of the display device, and the second color deviation parameter can accurately reflect the display situation of the curved display area of the display device, thereby improving the accuracy of the color deviation detection result of the display device obtained according to the first color deviation parameter and the second color deviation parameter. Description of the Drawings

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0051] Figure 1 It is a schematic structural diagram of a display device in the related art;

[0052] Figure 2 It is one of the schematic diagrams when taking points on the curved display area of the display device in the related art;

[0053] Figure 3 It is another schematic diagram when taking points on the curved display area of the display device in the related art;

[0054] Figure 4 It is a schematic structural diagram of a display device provided by an embodiment of the present application;

[0055] Figure 5 It is a flowchart of a color deviation detection method for a display device provided by an embodiment of the present application;

[0056] Figure 6 It is a schematic diagram of a first photographed image in the color deviation detection method for a display device provided by an embodiment of the present application;

[0057] Figure 7 It is a schematic diagram of the photographing direction of the first photographed image in the color deviation detection method for a display device provided by an embodiment of the present application;

[0058] Figure 8 ForFigure 6 One of the schematic diagrams of the positions of the first image area and the second image area in the first captured image shown;

[0059] Figure 9 For Figure 6 Another one of the schematic diagrams of the positions of the first image area and the second image area in the first captured image shown;

[0060] Figure 10 For Figure 6 The third one of the schematic diagrams of the positions of the first image area and the second image area in the first captured image shown;

[0061] Figure 11 Schematic diagram of the second captured image in the color deviation detection method of the display device provided by an embodiment of the present application;

[0062] Figure 12 Schematic diagram of the second captured image in the color deviation detection method of the display device provided by another embodiment of the present application;

[0063] Figure 13 Schematic diagram of the shooting direction of the second captured image in the color deviation detection method of the display device provided by an embodiment of the present application;

[0064] Figure 14 For Figure 11 One of the schematic diagrams of the positions of the first image area and the second image area in the second captured image shown;

[0065] Figure 15 For Figure 11 Another one of the schematic diagrams of the positions of the first image area and the second image area in the second captured image shown;

[0066] Figure 16 Schematic diagram of the structure of the color deviation detection system provided by an embodiment of the present application;

[0067] Figure 17 For Figure 16 Schematic diagram of the structure of the color deviation detection system shown after the stage rotates by a predetermined angle;

[0068] Figure 18 For Figure 16 Schematic diagram of the structure of the color deviation detection system shown after the shooting device rotates by a predetermined angle.

[0069] Explanation of reference numerals:

[0070] 100-display device; 101-flat display area; 102-curved display area; 201-flat display area image; 202-curved display area image; 301-first image area; 302-second image area; 400-first captured image; 500-second captured image; 10-carrier; 20-display control device; 30-capturing device; 40-processing device; 50-light source; 60-enclosed structure. DETAILED DESCRIPTION

[0071] As described in the background technology, the inventors have discovered through long-term research that the evaluation results of the color deviation degree of the display device in the related technology are not accurate enough and cannot truly reflect the color deviation degree of the display device. The inventors have discovered that when performing color deviation detection on a display device, a color analyzer is usually used to directly take points in the flat display area and the curved display area of ​​the test screen of the display device, and measure parameters such as the brightness and color coordinates of each point, and output the color deviation detection results of the display device based on the measurement results.

[0072] Since the curved display area of ​​a display device is usually small in size, the color analyzer is prone to inaccurate point positioning when taking points. Inaccurate point positioning will cause the measured brightness, color coordinates and other parameter values ​​of the point to fail to accurately reflect the display conditions of the area where it is located, thereby causing the output color deviation detection result of the display device to be inaccurate and unable to truly reflect the degree of color deviation of the display device.

[0073] Below Figure 1 Taking the display device shown in the figure as an example, the problem that using a color analyzer to detect color deviation of a display device may cause inaccurate detection results is specifically analyzed. Figure 1 As shown, the display device 100 has a connected flat display area 101 and a curved display area 102, and the curved display area 102 is located at two opposite sides of the flat display area 101. When the display device 100 is subjected to color shift detection, the display device 100 is controlled to display a test picture, and a color analyzer is used to select points in the curved display areas 102 on both sides and the flat display area 101 in the middle, and parameters such as brightness and color coordinates are measured for each selected point, and the color shift detection result of the display device 100 is output according to the measurement result.

[0074] When selecting points on the curved display area 102, the outer edge of the curved display area 102 ( Figure 1 The line L1 in the figure can also be used as a reference, or the inner edge of the curved display area 102 ( Figure 1 When the outer edge of the curved display area 102 is used as a reference, Figure 2 As shown, when the color analyzer takes points, it may take points outside the outer edge of the curved display area 102 (for example Figure 2point A) in it. When taking the inner edge of the curved surface display area 102 as a reference, as Figure 3 shown, when the color analyzer takes points, it may take points on the flat display area 101 (for example Figure 3 point B) in it.

[0075] In the above two cases, the color analyzer may take points on the area outside the curved surface display area 102. The parameters such as brightness and color coordinates of the points on the area outside the curved surface display area 102 cannot reflect the display situation of the curved surface display area 102, and even deviate greatly from the display situation of the curved surface display area 102. Furthermore, the color deviation detection result of the display device 100 obtained based on these parameters cannot truly reflect the actual color deviation degree of the display device 100.

[0076] To solve the above technical problems, the embodiment of the present application provides a method for detecting color deviation of a display device, which obtains a captured image of a test screen of the display device, selects image areas corresponding to different display areas in the captured image, and obtains a color deviation detection result of the display device according to the color deviation parameters of each image area. The acquisition positions of each image area are more accurate, so that each color deviation parameter can more accurately reflect the display situation of the corresponding area, and further improve the accuracy of the color deviation detection result of the display device obtained according to each color deviation parameter.

[0077] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than 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 efforts shall fall within the protection scope of the present application.

[0078] Referring to Figure 4 shown, the display device 100 provided by the embodiment of the present application has a connected flat display area 101 and a curved surface display area 102, and both the flat display area 101 and the curved surface display area 102 can display images. The flat display area 101 is adjacent to the curved surface display area 102. For example, in Figure 4 the embodiment shown, the curved surface display area 102 is arranged on opposite sides of the flat display area 101. In other embodiments, the curved surface display area 102 may also be arranged only on one side of the flat display area 101.

[0079] Optionally, the display device 100 includes a flexible display panel, which has a flat portion and a curved portion connected to the flat portion. The area for display in the flat portion is the flat display area 101, and the area for display in the curved portion is the curved display area 102. The flexible display panel can be, for example, an OLED (Organic Light Emitting Diode) display panel.

[0080] Since there may be color deviation between the curved display area 102 and the flat display area 101 of the display device in the display state, it is necessary to detect the color deviation of the display device 100. As Figure 5 shown, the color deviation detection method of the display device provided by the embodiment of the present application includes the following steps:

[0081] S10. Control the display device to display a test screen of a single color;

[0082] S20. Obtain a captured image of the test screen. The captured image includes a flat display area image corresponding to the flat display area and a curved display area image corresponding to the curved display area;

[0083] S30. Select at least one first image area and at least one second image area in the captured image. The first image area is located in the flat display area image, and the second image area is located in the curved display area image;

[0084] S40. Obtain a first color deviation parameter of the first image area and a second color deviation parameter of the second image area;

[0085] S50. Obtain a color deviation detection result of the display device according to the first color deviation parameter and the second color deviation parameter.

[0086] It can be understood that both the first color deviation parameter and the second color deviation parameter in step S40 are parameters related to color deviation. Comparing the first color deviation parameter and the second color deviation parameter can reflect the color deviation degree of the display device 100. For example, the first color deviation parameter can be parameters related to color deviation such as the brightness, contrast, and color coordinates of the first image area, and the second color deviation parameter can be parameters related to color deviation such as the brightness, contrast, and color coordinates of the second image area.

[0087] In step S50, the color deviation detection result of the display device 100 can be one or more parameter values for characterizing the color deviation degree of the display device 100, or a grade evaluation of the color deviation degree of the display device 100, such as "excellent", "good", "poor", etc.

[0088] In the above embodiments, since the first image area and the second image area are selected from the captured image of the test screen, the selection positions of the first image area and the second image area are more accurate, ensuring that the first image area is selected from the flat display area image of the corresponding flat display area, and the second image area is selected from the curved display area image of the corresponding curved display area. As a result, the first color deviation parameter can accurately reflect the display condition of the flat display area 101 of the display device 100, and the second color deviation parameter can accurately reflect the display condition of the curved display area 102 of the display device 100, thereby improving the accuracy of the color deviation detection result of the display device 100 obtained based on the first color deviation parameter and the second color deviation parameter.

[0089] The captured image mentioned in step S20 refers to the image obtained by capturing the test screen. For example, a capturing device is used to capture the test screen of the display device 100, and the image captured by the capturing device is used as the captured image of the above-mentioned test screen. The capturing device is, for example, a camera. When the display device 100 displays a test screen of a single color, both the flat display area 101 and the curved display area 102 display a single color. The image obtained by capturing the flat display area 101 is the flat display area image, and the image obtained by capturing the curved display area 102 is the curved display area image. It can be further understood that the flat display area 101 and the curved display area 102 mentioned here are both areas of the display device 100 for displaying the screen. In some embodiments, the captured image includes, in addition to the flat display area image and the curved display area image, a non-display area image corresponding to the non-display area. For example, when the display device 100 includes an in-screen camera, the area corresponding to the camera can be a non-display area, that is, a non-display area image corresponding in the captured image. When selecting the first image area and the second image area in step S30, these non-display area images need to be avoided.

[0090] As Figure 6 shown, the above-mentioned captured image includes a first captured image 400, and the shooting direction of the first captured image 400 is perpendicular to the flat display area 101. For example, as Figure 7 shown, when using the capturing device 30 to capture the test screen of the display device 100, the lens central axis of the capturing device 30 is perpendicular to the flat display area 101 of the display device 100. The color deviation detection result obtained based on the first captured image 400 can reflect the color deviation condition of the display device 100 in the front view angle (i.e., when the user is directly facing the flat display area 101 of the display device 100).

[0091] Continuing to refer to Figure 6 , the first captured image 400 includes a flat display area image 201 corresponding to the flat display area 101 and a curved display area image 202 corresponding to the curved display area 102. As Figure 8As shown, at least part of the area in the flat display area image 201 is selected as the first image area 301, and at least part of the area in the curved display area image 202 is selected as the second image area 302.

[0092] The color deviation detection result obtained from the first captured image 400 may include, for example, a first color deviation evaluation parameter X1. The first color deviation evaluation parameter X1 is calculated based on the first color deviation parameter of the first image area and the second color deviation parameter of the second image area obtained from the first captured image 400. The first color deviation evaluation parameter X1 is used to characterize the color deviation degree of the display device 100 in the front view angle.

[0093] In the above embodiments, the flat display area image 201 of the first captured image 400 can be directly used as the first image area 301, or part of the image in the flat display area image 201 of the first captured image 400 can be selected as the first image area 301. Similarly, the curved display area image 202 of the first captured image 400 can be directly used as the second image area 302, or part of the image in the curved display area image 202 of the first captured image 400 can be selected as the second image area 302.

[0094] Take Figure 4 the shown display device 100 as an example. As Figure 4 shown, the curved display area 102 of the display device 100 is located on opposite sides of the flat display area 101. Correspondingly, as Figure 6 shown, the curved display area image 202 of the first captured image 400 is located on both sides of the flat display area image 201. In an optional embodiment, as Figure 8 shown, a long strip area is selected in the flat display area image 201 as the first image area 301, and a long strip area is respectively selected in the curved display area images 202 on both sides as the second image area 302, and both the first image area 301 and the second image area 302 extend along the first direction ( Figure 8 the direction indicated by the arrow in

[0095] In the embodiment where the first color deviation parameter includes the brightness, contrast, horizontal coordinate of the color coordinate or vertical coordinate of the color coordinate of the first image area 301, and the second color deviation parameter includes the brightness, contrast, horizontal coordinate of the color coordinate or vertical coordinate of the color coordinate of the second image area 302, the first color deviation parameter and the second color deviation parameter correspond to each other. Optionally, the calculation formula of the first color deviation evaluation parameter X1 is:

[0096] X1 = |R1 - R| + |R2 - R|; or,

[0097] X1 = Max(|R1 - R|, |R2 - R|); or,

[0098] X1 = (|R1 - R| + |R2 - R|) / R; or,

[0099] X1 = Max(|R1 - R| / R, |R2 - R| / R);

[0100] Wherein, R is the parameter value of the first color deviation parameter of the first image area 301 in the first captured image, R1 is the parameter value of the second color deviation parameter of the second image area 302 on one side in the first captured image, and R2 is the parameter value of the second color deviation parameter of the second image area 302 on the other side in the first captured image. For example, when the first color deviation parameter is the brightness of the first image area 301 and the second color deviation parameter is the brightness of the second image area 302, R is the brightness value of the first image area 301, R1 is the brightness value of the second image area 302 on one side, and R2 is the brightness value of the second image area 302 on the other side. It can be understood that the brightness described in this article refers to the average brightness. For example, the brightness of the first image area 301 refers to the average brightness of the first image area 301, and the brightness of the second image area 302 refers to the average brightness of the second image area 302.

[0101] In an embodiment where the first color deviation parameter includes the color coordinates of the first image area 301 and the second color deviation parameter includes the color coordinates of the second image area 302, optionally, the calculation formula of the first color deviation evaluation parameter X1 is:

[0102] Or,

[0103]

[0104] Wherein, x is the horizontal axis coordinate value of the color coordinates of the first image area 301 in the first captured image; x1 is the horizontal axis coordinate value of the color coordinates of the second image area 302 on one side in the first captured image; x2 is the horizontal axis coordinate value of the color coordinates of the second image area 302 on the other side in the first captured image; y is the vertical axis coordinate value of the color coordinates of the first image area 301 in the first captured image; y1 is the vertical axis coordinate value of the color coordinates of the second image area 302 on one side in the first captured image; y2 is the vertical axis coordinate value of the color coordinates of the second image area 302 on the other side in the first captured image.

[0105] When selecting the first image area 301 in the planar display area image 201 of the first captured image 400, in another embodiment, such as Figure 9As shown, two strip-shaped first image areas 301 are selected in the planar display area image 201, and the two first image areas 301 are respectively arranged close to the second image areas 302 on both sides. At this time, when comparing the color deviation parameters of the first image area 301 and the second image area 302, the color deviation parameters of the first image area 301 and the second image area 302 close to it are compared, so as to obtain a more accurate color deviation detection result.

[0106] For example, in an embodiment where the first color deviation parameter includes the brightness, contrast, horizontal coordinate of the color coordinate or vertical coordinate of the color coordinate of the first image area 301, and the second color deviation parameter includes the brightness, contrast, horizontal coordinate of the color coordinate or vertical coordinate of the color coordinate of the second image area 302, optionally, the calculation formula of the first color deviation evaluation parameter X1 is:

[0107] X1 = |R1 - R3| + |R2 - R4|; or,

[0108] X1 = Max(|R1 - R3|, |R2 - R4|); or,

[0109] X1 = (|R 1- R3|) / R3 + (|R2 - R4|) / R4; or,

[0110] X1 = Max(|R1 - R3| / R3, |R2 - R4| / R4);

[0111] Wherein, R1 and R3 are respectively the parameter values of the second color deviation parameter of the second image area 302 on one side in the first captured image 400 and the parameter values of the first color deviation parameter of the first image area 301 arranged close to the second image area 302. R2 and R4 are respectively the parameter values of the second color deviation parameter of the second image area 302 on the other side in the first captured image 400 and the parameter values of the first color deviation parameter of the first image area 301 arranged close to the second image area 302. For example, when the first color deviation parameter is the brightness of the first image area 301 and the second color deviation parameter is the brightness of the second image area 302, R1 and R3 are respectively the brightness values of the second image area 302 on one side and the brightness values of the first image area 301 arranged close to the second image area 302, and R2 and R4 are respectively the brightness values of the second image area 302 on the other side and the brightness values of the first image area 301 arranged close to the second image area 302.

[0112] In an embodiment where the first color deviation parameter includes the color coordinate of the first image area 301 and the second color deviation parameter includes the color coordinate of the second image area 302, optionally, the calculation formula of the first color deviation evaluation parameter X1 is:

[0113] Or,

[0114]

[0115] Among them, x1 and x3 are respectively the horizontal axis coordinate values of the color coordinates of the second image area 302 on one side in the first captured image 400 and the horizontal axis coordinate values of the color coordinates of the first image area 301 arranged close to the second image area 302 on one side; x2 and x4 are respectively the horizontal axis coordinate values of the color coordinates of the second image area 302 on the other side in the first captured image 400 and the horizontal axis coordinate values of the color coordinates of the first image area 301 arranged close to the second image area 302 on the other side; y1 and y3 are respectively the vertical axis coordinate values of the color coordinates of the second image area 302 on one side in the first captured image and the vertical axis coordinate values of the color coordinates of the first image area 301 arranged close to the second image area 302 on one side; y2 and y4 are respectively the vertical axis coordinate values of the color coordinates of the second image area 302 on the other side in the first captured image and the vertical axis coordinate values of the color coordinates of the first image area 301 arranged close to the second image area 302 on the other side.

[0116] It can be understood that in other embodiments, the curved display area 102 of the display device 100 is located on the four sides of the flat display area 101. Correspondingly, the curved display area image 202 of the first captured image 400 can also be located on the four sides of the flat display area image 201. At this time, the second image area 302 can be selected in the curved display area image 202 on each of the four sides, and the first image area 301 can be selected in the flat display area image 201. The second image area 302 can be one or multiple. For example, the second image area 302 is four, and the four second image areas 302 are respectively arranged close to the four sides of the first image area 301. In this embodiment, the calculation method of the first color deviation evaluation parameter is similar to that when the curved display area image 202 of the first captured image 400 is located on both sides of the flat display area image 201, and will not be elaborated here.

[0117] In Figure 8 and Figure 9 In the embodiments shown, the lengths of the first image area 301 and the second image area 302 are not limited. In an alternative embodiment, the lengths of the first image area 301 and the second image area 302 are both equal to the length of the curved display area image 202, so as to be able to reflect the color deviation situation of the display device 100 as a whole.

[0118] The widths of the first image area 301 and the second image area 302 are not limited. Preferably, the width of the second image area 302 is less than the width of the curved display area image 202 where it is located. On the one hand, the amount of calculation is reduced, and on the other hand, it can be avoided that the second image area 302 captures images outside the curved display area image 202, ensuring the accuracy of the obtained color deviation detection result.

[0119] In an optional embodiment, the outer edge of the second image area 302 is flush with the outer edge of the curved surface display area image 202 where it is located. In the curved surface display area 102 of the display device 100, the area close to the flat display area 101 has a smaller degree of curvature, and the display effect difference between this area and the flat display area 101 is smaller; while the area far from the flat display area 101 has a larger degree of curvature, and the display effect difference between this area and the flat display area 101 is larger. In the above design, the part of the curved surface display area image 202 with a smaller difference from the flat display area image 201 is removed, and the part with a larger difference from the flat display area image 201 is retained, thereby further improving the accuracy of the obtained color deviation detection result.

[0120] In Figure 8 and Figure 9 In the illustrated embodiment, long strip regions extending along the first direction are respectively selected as the first image area 301 and the second image area 302 in the flat display area image 201 and the curved surface display area image 202. In another embodiment, it may also be that multiple first image areas 301 arranged along the first direction are selected in the flat display area image 201, and multiple second image areas 302 arranged along the first direction are selected in the curved surface display area image 202. The multiple second image areas 302 correspond to the multiple first image areas 301 one by one, that is, in the first direction, the positions of the first image area 301 and the corresponding second image area 302 are corresponding. Obtaining the color deviation detection result according to the color deviation parameters of the corresponding first image area 301 and second image area 302 can further improve the accuracy of the color deviation detection result.

[0121] In an optional embodiment, as Figure 10 shown, there are N first image areas 301 arranged along the first direction, and the first direction is parallel to the extension direction of the curved surface display area image 202. There are N second image areas 302 arranged along the first direction on each side, and they correspond to the respective first image areas 301 one by one. N is a positive integer greater than or equal to 3, and the value of N is not specifically limited. For example, it can be 3, 7, 11, 20, etc.

[0122] The above-mentioned respective second image areas 302 corresponding to the respective first image areas 301 one by one means that in the first direction, the positions of the second image area 302 and the corresponding first image area 301 are corresponding. For example, Figure 10 in the illustrated orientation, the second image area 302 and the corresponding first image area 301 are at the same height. The respective first image areas 301 are arranged along the first direction, and there may be an interval between adjacent first image areas 301, or they may be adjacently arranged. The shapes of the respective second image areas 302 are the same as the shapes of the corresponding first image areas 301, and the sizes of the respective second image areas 302 are equal to the sizes of the corresponding first image areas 301.

[0123] When adopting Figure 10 the method of selecting the first image area 301 and the second image area 302 as shown, in an embodiment where the first color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the first image area 301, and the second color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the second image area 302, optionally, the calculation formula of the first color deviation evaluation parameter X1 is:

[0124] X1 = (|R A1 - R B1 | + |R A1 - R C1 |) + … + (|R Ai - R Bi | + |R Ai - R Ci |) + … + (|R AN - R BN | + |R AN - R CN |);

[0125] Wherein, along the first direction, R A1 , R Ai , R AN are respectively the parameter values of the first color deviation parameter of the 1st, the i-th, and the N-th first image areas 301 in the first captured image, R B1 , R Bi , R BN are respectively the parameter values of the second color deviation parameter of the 1st, the i-th, and the N-th second image areas 302 on one side of the first captured image, R C1 , R Ci , R CN are respectively the parameter values of the second color deviation parameter of the 1st, the i-th, and the N-th second image areas 302 on the other side of the first captured image, 1 < i < N, and i is a positive integer, N is a positive integer greater than or equal to 3. For example, when the first color deviation parameter is the brightness of the first image area 301 and the second color deviation parameter is the brightness of the second image area 302, R A1 , R Ai , R AN are respectively the brightness values of the 1st, the i-th, and the N-th first image areas 301, R B1 , R Bi , R BN are respectively the brightness values of the 1st, the i-th, and the N-th second image areas 302 on one side, R C1 , R Ci , R CN are respectively the brightness values of the 1st, the i-th, and the N-th second image areas 302 on the other side.

[0126] In an embodiment where the first color deviation parameter includes the color coordinates of the first image area 301 and the second color deviation parameter includes the color coordinates of the second image area 302, optionally, the calculation formula for the first color deviation evaluation parameter X1 is:

[0127]

[0128] where, along the first direction, x A1 、x Ai 、x AN are respectively the abscissa coordinate values of the color coordinates of the 1st, the ith, and the Nth first image areas 301 in the first captured image, y A1 、y Ai 、y AN are respectively the ordinate coordinate values of the color coordinates of the 1st, the ith, and the Nth first image areas 301 in the first captured image, x B1 、x Bi 、x BN are respectively the abscissa coordinate values of the color coordinates of the 1st, the ith, and the Nth second image areas 302 on one side in the first captured image, y B1 、y Bi 、y BN are respectively the ordinate coordinate values of the color coordinates of the 1st, the ith, and the Nth second image areas 302 on one side in the first captured image, x C1 、x Ci 、x CN are respectively the abscissa coordinate values of the color coordinates of the 1st, the ith, and the Nth second image areas 302 on the other side in the first captured image, y C1 、y Ci 、y CN are respectively the ordinate coordinate values of the color coordinates of the 1st, the ith, and the Nth second image areas 302 on the other side in the first captured image, 1 < i < N, and i is a positive integer, N is a positive integer greater than or equal to 3.

[0129] In the above embodiments, the captured image includes a first captured image 400 whose shooting direction is perpendicular to the plane display area 101, and the color deviation detection result obtained from the first captured image 400 is used to reflect the color deviation situation of the display device 100 in the front view angle. Further, as Figure 11 and Figure 12 shown, the captured image further includes a second captured image 500, and the shooting direction of the second captured image 500 forms a predetermined angle θ other than 90° with the plane display area 101. For example, as Figure 13As shown, when the test screen of the display device 100 is photographed by the photographing device 30, the central axis of the lens of the photographing device 30 forms a predetermined angle θ other than 90° with the planar display area 101 of the display device 100. The color deviation detection result obtained from the second photographed image 500 can reflect the color deviation of the display device 100 at an inclined viewing angle (i.e., the viewing angle of the user is not perpendicular to the planar display area of the display device 100).

[0130] In an optional embodiment, when photographing the first photographed image 400 and the second photographed image 500, the distance between the photographing device 30 and the display device 100 remains unchanged to ensure the consistency of the evaluation. For example, as Figure 7 shown, when photographing the first photographed image 400, the intersection point of the central axis of the lens of the photographing device 30 and the planar display area 101 is H, as Figure 13 shown, when photographing the second photographed image 500, the intersection point of the central axis of the lens of the photographing device 30 and the planar display area 101 is H', the center of the lens of the photographing device 30 is I, and the distance between point I and point H is equal to the distance between point I and point H'.

[0131] Continuing to refer to Figure 11 and Figure 12 , the second photographed image 500 includes a planar display area image 201 corresponding to the planar display area 101 and a curved surface display area image 202 corresponding to the curved surface display area 102. As Figure 14 shown, at least part of the area is selected as the first image area 301 in the planar display area image 201, and at least part of the area is selected as the second image area 302 in the curved surface display area image 202.

[0132] The color deviation detection result obtained from the second photographed image 500 may include, for example, a second color deviation evaluation parameter X2, which is calculated based on the first color deviation parameter of the first image area 301 and the second color deviation parameter of the second image area 302 obtained from the second photographed image 500. The second color deviation evaluation parameter X2 is used to characterize the color deviation degree of the display device 100 at an inclined viewing angle.

[0133] In the above embodiment, the planar display area image 201 of the second photographed image 500 may be directly used as the first image area 301, or part of the image in the planar display area image 201 of the second photographed image 500 may be selected as the first image area 301. Similarly, the curved surface display area image 202 of the second photographed image 500 may be directly used as the second image area 302, or part of the image in the curved surface display area image 202 of the second photographed image 500 may be selected as the second image area 302.

[0134] Continuing with the display device 100 shown in Figure 4 as an example, asFigure 4 As shown, the curved display areas 102 of the display device 100 are located on opposite sides of the flat display area 101. In this embodiment, when the tilting degree of the shooting direction of the second captured image 500 relative to the flat display area 101 is small, in the second captured image 500, the curved display area images 202 are located on both sides of the flat display area image 201. When the tilting degree of the shooting direction of the second captured image 500 relative to the flat display area 101 is large, only the curved display area 102 close to the shooting side (for example, close to the shooting device 30) in the curved display area 102 can be captured. For example, in Figure 11 the shown embodiment, only the left curved display area 102 can be captured. For another example, in Figure 12 the shown embodiment, only the right curved display area 102 can be captured. At this time, in the second captured image 500, the curved display area image 202 is located on one side of the flat display area image 201.

[0135] For the convenience of unified calculation, in the second captured image 500, a part of the image in the flat display area image 201 is selected as the first image area 301, and a part of the image in the curved display area image 202 of the curved display area 102 close to the shooting side is selected as the second image area 302. That is, in the second captured image 500, the curved display area image 202 includes the image obtained by shooting the curved display area 102 close to the shooting side, and a part of the image in this image is selected as the second image area 302.

[0136] In an alternative embodiment, as Figure 14 shown, both the first image area 301 and the second image area 302 are strip-shaped, and both the first image area 301 and the second image area 302 extend along the second direction ( Figure 14 the direction indicated by the arrow in

[0137] ), and the second direction is parallel to the extending direction of the curved display area image 202.

[0138] X2 = |R5 - R6|; or,

[0139] X2 = |R5 - R6| / R6;

[0140] Among them, R6 is the parameter value of the first color deviation parameter of the first image area 301 in the second captured image; R5 is the parameter value of the second color deviation parameter of the second image area 302 in the second captured image. For example, when the first color deviation parameter is the brightness of the first image area 301 and the second color deviation parameter is the brightness of the second image area 302, R6 is the brightness value of the first image area 301 and R5 is the brightness value of the second image area 302.

[0141] In an embodiment where the first color deviation parameter includes the color coordinates of the first image area 301 and the second color deviation parameter includes the color coordinates of the second image area 302, optionally, the calculation formula of the second color deviation evaluation parameter X2 is:

[0142]

[0143] Among them, x6 is the horizontal axis coordinate value of the color coordinates of the first image area in the second captured image; y6 is the vertical axis coordinate value of the color coordinates of the first image area in the second captured image; x5 is the horizontal axis coordinate value of the color coordinates of the second image area in the second captured image; y5 is the vertical axis coordinate value of the color coordinates of the second image area in the second captured image.

[0144] In Figure 14 In the embodiment shown, the lengths of the first image area 301 and the second image area 302 are not limited. In an optional embodiment, the lengths of both the first image area 301 and the second image area 302 are equal to the length of the curved surface display area image 202, so as to be able to reflect the color deviation situation of the display device 100 as a whole.

[0145] The widths of the first image area 301 and the second image area 302 are not limited. Preferably, the width of the second image area 302 is less than the width of the curved surface display area image 202 where it is located. On the one hand, the amount of calculation is reduced, and on the other hand, it can be avoided that the second image area 302 captures an image outside the curved surface display area image 202, ensuring the accuracy of the obtained color deviation detection result.

[0146] In an optional embodiment, the outer edge of the second image area 302 is flush with the outer edge of the curved surface display area image 202 where it is located. In the curved surface display area 102 of the display device 100, the bending degree of the area close to the flat display area 101 is small, and the display effect difference between this area and the flat display area 101 is small; while the bending degree of the area far from the flat display area 101 is large, and the display effect difference between this area and the flat display area 101 is large. The above design removes the part of the curved surface display area image 202 with a small difference from the flat display area image 201 and retains the part with a large difference from the flat display area image 201, thereby further improving the accuracy of the obtained color deviation detection result.

[0147] In Figure 14In the embodiment shown, in the flat display area image 201 and the curved display area image 202, long strip-shaped areas extending along the second direction are respectively selected as the first image area 301 and the second image area 302. In another embodiment, it may also be that multiple first image areas 301 arranged along the second direction are selected in the flat display area image 201, and multiple second image areas 302 arranged along the second direction are selected in the curved display area image 202. The multiple second image areas 302 correspond to the multiple first image areas 301 one by one, that is, in the second direction, the positions of the first image area 301 and the corresponding second image area 302 correspond to each other. Obtaining the color deviation detection result according to the color deviation parameters of the one-to-one corresponding first image area 301 and second image area 302 can further improve the accuracy of the color deviation detection result.

[0148] In an alternative embodiment, as Figure 15 shown, there are M first image areas 301 arranged along the second direction, and there are M second image areas 302 arranged along the second direction, and they correspond to each first image area 301 one by one. M is a positive integer greater than or equal to 3, and the value of M is not specifically limited. For example, it can be 3, 7, 11, 20, etc.

[0149] The above-mentioned each second image area 302 corresponds to each first image area 301 one by one, which means that in the second direction, the position of the second image area 302 and the corresponding first image area 301 correspond to each other. For example, Figure 15 in the orientation shown, the second image area 302 and the corresponding first image area 301 are at the same height. Each first image area 301 is arranged along the second direction, and there may be an interval between adjacent first image areas 301, or they may be adjacently arranged. The shape of each second image area 302 is the same as the shape of the corresponding first image area 301, and the size of each second image area 302 is equal to the size of the corresponding first image area 301.

[0150] Adopting Figure 15 the method of selecting the first image area 301 and the second image area 302 as shown, in the embodiment where the first color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or the vertical axis coordinate of the color coordinate of the first image area 301, and the second color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or the vertical axis coordinate of the color coordinate of the second image area 302, optionally, the calculation formula of the second color deviation evaluation parameter X2 is:

[0151] X2 = |R D1 -R E1 | + … + |R Di -R Ei | + … + |R DM -R EM |;

[0152] Among them, along the second direction, R D1 , R Di , R DM are respectively the parameter values of the first color deviation parameters of the 1st, the ith, and the Mth first image regions 301 in the second captured image. R E1 , R Ei , R EM are respectively the parameter values of the second color deviation parameters of the 1st, the ith, and the Mth second image regions 302 in the second captured image. 1 < i < M, and i is a positive integer, and M is a positive integer greater than or equal to 3. For example, when the first color deviation parameter is the brightness of the first image region 301 and the second color deviation parameter is the brightness of the second image region 302, R D1 , R Di , R DM are respectively the brightness values of the 1st, the ith, and the Mth first image regions 301, and R E1 , R Ei , R EM are respectively the brightness values of the 1st, the ith, and the Mth second image regions 302.

[0153] In an embodiment where the first color deviation parameter includes the color coordinates of the first image region 301 and the second color deviation parameter includes the color coordinates of the second image region 302, optionally, the calculation formula of the second color deviation evaluation parameter X2 is:

[0154]

[0155] Among them, along the second direction, x D1 , x Di , x DM are respectively the horizontal axis coordinate values of the color coordinates of the 1st, the ith, and the Mth first image regions 301 in the second captured image, and y D1 , y Di , y DM are respectively the vertical axis coordinate values of the color coordinates of the 1st, the ith, and the Mth first image regions 301 in the second captured image. x E1 , x Ei , x EM are respectively the horizontal axis coordinate values of the color coordinates of the 1st, the ith, and the Mth second image regions 302 in the second captured image, and y E1 , y Ei , y EM are respectively the vertical axis coordinate values of the color coordinates of the 1st, the ith, and the Mth second image regions 302 in the second captured image. 1 < i < M, and i is a positive integer, and M is a positive integer greater than or equal to 3.

[0156] It can be understood that parameters such as the brightness, contrast, and color coordinates of the above-mentioned first image area 301 and second image area 302 can be detected by devices such as an image analyzer, which is prior art and will not be elaborated here.

[0157] In an embodiment where the captured image includes the second captured image 500, preferably, the captured image includes a plurality of second captured images 500 with different shooting directions. For example, as Figure 13 shown, when the shooting direction of the second captured image 500 is inclined to the right, the predetermined angle θ is positive. When the shooting direction of the second captured image 500 is inclined to the left, the predetermined angle θ is negative, and the predetermined angle θ can be -60°, -45°, -30°, -15°, 15°, 30°, 45°, 60°.

[0158] Furthermore, the color deviation detection result includes a third color deviation evaluation parameter X3, and the third color deviation evaluation parameter X3 is the sum of the first color deviation evaluation parameter X1 and the second color deviation evaluation parameters X2 corresponding to each second captured image 500. The third color deviation evaluation parameter X3 can reflect the comprehensive color deviation degree of the display device 100 from multiple different perspectives. For example, the second color deviation evaluation parameters corresponding to the second captured images 500 with predetermined angles θ of -60°, -45°, -30°, -15°, 15°, 30°, 45°, 60° are X2(-60°), X2(-45°), X2(-30°), X2(-15°), X2(15°), X2(30°), X2(45°), X2(60°) respectively, then the third color deviation evaluation parameter X3 = X1 + X2(-60°) + X2(-45°) + X2(-30°) + X2(-15°) + X2(15°) + X2(30°) + X2(45°) + X2(60°). In other embodiments, the second color deviation evaluation parameter X2 corresponding to each second captured image 500 can also select other predetermined angles θ, which can be specifically set according to actual situations and are not limited here.

[0159] The above introduces various embodiments of color deviation detection for the display device 100 when displaying a test screen of a specific single color. In another alternative embodiment, the display device 100 is controlled to display test screens of a plurality of different single colors, and for each single - color test screen, a third color deviation evaluation parameter X3 is calculated correspondingly. For example, the display device 100 is controlled to display test screens of white, red, green, and blue respectively, and the third color deviation evaluation parameters X3(white), X3(red), X3(green), and X3(blue) under the test screens of white, red, green, and blue are calculated respectively.

[0160] Further, the color deviation detection result includes a fourth color deviation evaluation parameter X4, and the fourth color deviation evaluation parameter X4 is the sum of the third color deviation evaluation parameters X3. Among them, when calculating the third color deviation evaluation parameter X3, the calculation methods described in the above various embodiments can be used. The fourth color deviation evaluation parameter X4 can reflect the comprehensive color deviation degree of the display device 100 under different display colors. For example, in the above embodiment where the display device 100 is controlled to display test pictures of white, red, green, and blue respectively, the fourth color deviation evaluation parameter X4 = X3(white) + X3(red) + X3(green) + X3(blue).

[0161] In addition, the above first color deviation evaluation parameter X1, second color deviation evaluation parameter X2, third color deviation evaluation parameter X3, and fourth color deviation evaluation parameter X4 can also be calculated respectively when the display device 100 is under different ambient illuminances, so as to more comprehensively reflect the color deviation degree of the display device 100. For example, the following table can be output:

[0162]

[0163]

[0164] It can be understood that the color deviation detection method provided by the embodiments of the present application is applicable to any display device 100 having a connected flat display area 101 and a curved display area 102 and having a color deviation problem, and can also be used to detect an unknown display device 100 to determine whether there is a color deviation problem. If there is a color deviation problem, it can be evaluated. The display device 100 can be, for example, a mobile device such as a mobile phone, a tablet computer, a notebook computer, a handheld computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), or a non-mobile device such as a personal computer (PC), a television (TV), a teller machine, or a self-service machine, etc.

[0165] In addition, it should be noted that the color deviation detection method provided by the embodiments of the present application can perform color deviation detection on the display panel of the display device 100 alone, or can perform color deviation detection on the display panel covered with a cover plate.

[0166] The embodiments of the present application also provide a color deviation detection system for detecting the color deviation of a display device. Refer to Figure 4As shown, the display device 100 has a connected flat display area 101 and a curved display area 102, and both the flat display area 101 and the curved display area 102 can perform screen display. The flat display area 101 is adjacent to the curved display area 102. For example, in Figure 4 the illustrated embodiment, the curved display area 102 is provided on opposite sides of the flat display area 101. In other embodiments, the curved display area 102 may also be provided only on one side of the flat display area 101.

[0167] As Figure 16 shown, the color deviation detection system includes a stage 10, a display control device 20, a photographing device 30, and a processing device 40. Among them, the stage 10 is used to carry the display device 100. The display control device 20 is signal-connected to the display device 100 on the stage 10 and is used to control the display device 100 to display a test screen of a single color. The photographing device 30 is used to photograph the test screen to obtain a photographed image. The processing device 40 is signal-connected to the photographing device 30 and is used to acquire the photographed image, select at least one first image area and at least one second image area in the photographed image, acquire a first color deviation parameter of the first image area and a second color deviation parameter of the second image area, and obtain a color deviation detection result of the display device 100 according to the first color deviation parameter and the second color deviation parameter. Among them, the photographed image includes a flat display area image corresponding to the flat display area and a curved display area image corresponding to the curved display area, the first image area is located in the flat display area image, and the second image area is located in the curved display area image.

[0168] It can be understood that the specific processing process of the processing device 40 for the photographed image and the process of obtaining the color deviation detection result are similar to the above-described color deviation detection method. For details, reference can be made to the above introduction and will not be elaborated here.

[0169] The stage 10 can be fixedly arranged or can be arranged as a structure with an adjustable tilt angle. In an alternative embodiment, the color deviation detection system further includes an adjustment device for adjusting the tilt angle of the stage 10 to adjust the angle between the photographing direction of the photographing device 30 and the flat display area of the display device 100 on the stage 10. For example, as Figure 17 shown, the adjustment device can make the stage 10 tilt relative to the photographing direction of the photographing device 30. By adjusting the tilt angle of the stage 10, the photographing device 30 can obtain a first photographed image and a plurality of second photographed images with different photographing directions.

[0170] The adjustment device can be any device capable of adjusting the tilt angle of the stage 10. For example, the adjustment device is a motor, and the motor shaft of the motor is connected to the stage 10, so that when the motor shaft rotates, the stage 10 rotates synchronously to change the tilt angle of the stage 10.

[0171] Of course, it can be understood that the stage 10 can also be fixedly arranged, and the adjusting device is used to adjust the position of the photographing device 30, so as to adjust the angle between the photographing direction of the photographing device 30 and the flat display area of the display device 100. For example, as Figure 18 shown, the adjusting device can make the photographing direction of the photographing device 30 be inclined relative to the flat display area of the display device 100. By adjusting the position of the photographing device 30, the photographing device 30 can obtain a first photographed image and a plurality of second photographed images with different photographing directions.

[0172] In an alternative embodiment, the adjusting device includes a motor and an annular structure connected to the motor shaft. The photographing device 30 is fixed on the annular structure. When the motor shaft rotates, it drives the annular structure to rotate synchronously, so that the photographing device 30 rotates around the central axis of the annular structure, thereby changing the photographing direction of the photographing device 30.

[0173] When the above color deviation detection system performs color deviation detection on the display device 100, it can be exposed to a daylight environment or simulate different environmental illuminances, so as to perform more comprehensive color deviation detection on the display device 100. In an alternative embodiment, the color deviation detection system further includes an enclosure structure 60. The enclosure structure 60 is used to provide an enclosed space, and both the stage 10 and the photographing device 30 are located in the enclosed space. A light source 50 is also arranged in the enclosed space, and the brightness of the light source is adjustable. Different environmental illuminances are simulated by adjusting the brightness of the light source.

[0174] In this specification, the embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0175] It should be noted that the phrases such as "an embodiment", "embodiment", "exemplary embodiment", "some embodiments" mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily each embodiment includes the specific feature, structure or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when combining an embodiment to describe a specific feature, structure or characteristic, it is within the knowledge scope of those skilled in the art to implement such a feature, structure or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0176] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part according to the context, the term "one or more" used in the text can be used to describe any feature, structure or characteristic in a singular sense, or can be used to describe a combination of features, structures or characteristics in a plural sense. Similarly, at least in part according to the context, terms such as "a" or "the" can also be understood as conveying a singular usage or conveying a plural usage.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for detecting color deviation of a display device, characterized in that, The display device has a connected flat display area and a curved display area, and the color shift detection method includes: Controlling the display device to display a test picture of a single color; Obtaining a captured image of the test picture, where the captured image includes a flat display area image corresponding to the flat display area and a curved display area image corresponding to the curved display area; Selecting at least one first image area and at least one second image area in the captured image. The first image area is located in the flat display area image and is a partial image of the flat display area image; the second image area is located in the curved display area image and is a partial image of the curved display area image. Both the first image area and the second image area are strip-shaped, and both the first image area and the second image area extend along a first direction, and the first direction is parallel to the extension direction of the curved display area image; Obtaining a first color shift parameter of the first image area and a second color shift parameter of the second image area; Obtaining a color shift detection result of the display device according to the first color shift parameter and the second color shift parameter.

2. The method for detecting color deviation of a display device according to claim 1, characterized in that, The captured image includes a first captured image, and the shooting direction of the first captured image is perpendicular to the flat display area; The color shift detection result includes a first color shift evaluation parameter X1, and the first color shift evaluation parameter X1 is calculated according to the first color shift parameter of the first image area and the second color shift parameter of the second image area obtained from the first captured image. The first color shift evaluation parameter X1 is used to characterize the color shift degree of the display device in the front view angle.

3. The method for detecting color deviation of a display device according to claim 2, characterized in that, The curved display areas are arranged on opposite sides of the flat display area, and the curved display area images of the first captured image are located on both sides of the flat display area image; In the first captured image, the width of the second image area is smaller than the width of the curved display area image where it is located.

4. The method for detecting color deviation of a display device according to claim 3, characterized in that, The first color shift parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the first image area, and the second color shift parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the second image area. The first color shift parameter and the second color shift parameter correspond to each other.

5. The method for detecting color deviation of a display device according to claim 3, characterized in that, The number of the first image areas is one, and the calculation formula of the first color shift evaluation parameter X1 is: X1 = |R1 - R| + |R2 - R|; or, X1 = Max(|R1 - R|, |R2 - R|); or, X1 = (|R1 - R| + |R2 - R|) / R; or, X1 = Max(|R1 - R| / R, |R2 - R| / R); Wherein, R is the parameter value of the first color shift parameter of the first image area in the first captured image; R1 is the parameter value of the second color shift parameter of the second image area on one side in the first captured image; R2 is the parameter value of the second color shift parameter of the second image area on the other side in the first captured image; Or, The number of the first image areas is two, and the two first image areas are respectively arranged close to the second image areas on both sides. The calculation formula of the first color deviation evaluation parameter X1 is: X1 = |R1 - R3| + |R2 - R4|; or, X1 = Max(|R1 - R3|, |R2 - R4|); or, X1 = (|R 1- R3|) / R3 + (|R2 - R4|) / R4; alternatively, X1 = Max(|R1 - R3| / R3, |R2 - R4| / R4); wherein, R1 and R3 are respectively the parameter values of the second color deviation parameters of the second image areas on one side in the first captured image and the parameter values of the first color deviation parameters of the first image areas arranged close to the second image areas on one side; R2 and R4 are respectively the parameter values of the second color deviation parameters of the second image areas on the other side in the first captured image and the parameter values of the first color deviation parameters of the first image areas arranged close to the second image areas on the other side.

6. The method for detecting color deviation of a display device according to claim 3, characterized in that, The first color deviation parameters include the color coordinates of the first image areas, and the second color deviation parameters include the color coordinates of the second image areas; The number of the first image areas is one, and the calculation formula of the first color deviation evaluation parameter X1 is: Alternatively, wherein, x is the horizontal axis coordinate value of the color coordinates of the first image area in the first captured image; x1 is the horizontal axis coordinate value of the color coordinates of the second image area on one side in the first captured image; x2 is the horizontal axis coordinate value of the color coordinates of the second image area on the other side in the first captured image; y is the vertical axis coordinate value of the color coordinates of the first image area in the first captured image; y1 is the vertical axis coordinate value of the color coordinates of the second image area on one side in the first captured image; y2 is the vertical axis coordinate value of the color coordinates of the second image area on the other side in the first captured image; or, The number of the first image areas is two, and the two first image areas are respectively arranged close to the second image areas on both sides. The calculation formula of the first color deviation evaluation parameter X1 is: Alternatively, wherein, x1 and x3 are respectively the horizontal axis coordinate values of the color coordinates of the second image area on one side in the first captured image and the color coordinates of the first image area arranged close to the second image area on one side; x2 and x4 are respectively the horizontal axis coordinate values of the color coordinates of the second image area on the other side in the first captured image and the color coordinates of the first image area arranged close to the second image area on the other side; y1 and y3 are respectively the vertical axis coordinate values of the color coordinates of the second image area on one side in the first captured image and the color coordinates of the first image area arranged close to the second image area on one side; y2 and y4 are respectively the vertical axis coordinate values of the color coordinates of the second image area on the other side in the first captured image and the color coordinates of the first image area arranged close to the second image area on the other side.

7. The method for detecting color deviation of a display device according to claim 2, wherein The curved surface display area is arranged on the opposite sides of the plane display area, and the curved surface display area images of the first captured image are located on both sides of the plane display area image; In the first captured image, a partial image of the planar display area image is selected as the first image area, and partial images of the curved display area images on both sides are respectively selected as the second image areas. There are N first image areas arranged in a first direction, the first direction is parallel to the extension direction of the curved display area image, and there are N second image areas on each side arranged in the first direction and corresponding to each of the first image areas one by one, where N is a positive integer greater than or equal to 3.

8. The method for detecting color deviation of a display device according to claim 7, wherein The first color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the first image area, and the second color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the second image area; The calculation formula of the first color deviation evaluation parameter X1 is: X1 = (|R A1 -R B1 | + |R A1 -R C1 |) + … + (|R Ai -R Bi | + |R Ai -R Ci |) + … + (|R AN -R BN | + |R AN - R CN |)； Among them, along the first direction, R A1 , R Ai , R AN are the parameter values of the first color deviation parameters of the 1st, the ith, and the Nth first image regions in the first captured image respectively, R B1 , R Bi , R BN are the parameter values of the second color deviation parameters of the 1st, the ith, and the Nth second image regions on one side in the first captured image respectively, R C1 , R Ci , R CN are the parameter values of the second color deviation parameters of the 1st, the ith, and the Nth second image regions on the other side in the first captured image respectively, 1 < i < N, and i is a positive integer.

9. The method for detecting color deviation of a display device according to claim 7, wherein The first color deviation parameter includes the color coordinate of the first image area, and the second color deviation parameter includes the color coordinate of the second image area; The calculation formula of the first color deviation evaluation parameter X1 is: Among them, along the first direction, x A1 , x Ai , x AN are respectively the abscissa coordinate values of the color coordinates of the 1st, the ith, and the Nth first image regions in the first captured image, y A1 , y Ai , y AN are respectively the ordinate coordinate values of the color coordinates of the 1st, the ith, and the Nth first image regions in the first captured image, x B1 , x Bi , x BN are respectively the abscissa coordinate values of the color coordinates of the 1st, the ith, and the Nth second image regions on one side in the first captured image, y B1 , y Bi , y BN are respectively the ordinate coordinate values of the color coordinates of the 1st, the ith, and the Nth second image regions on one side in the first captured image, x C1 , x Ci , x CN are respectively the abscissa coordinate values of the color coordinates of the 1st, the ith, and the Nth second image regions on the other side in the first captured image, y C1 , y Ci , y CN are respectively the ordinate coordinate values of the color coordinates of the 1st, the ith, and the Nth second image regions on the other side in the first captured image, 1 < i < N, and i is a positive integer.

10. The method for detecting color deviation of a display device according to any one of claims 2 to 9, wherein The captured image includes a second captured image, and the shooting direction of the second captured image forms a predetermined angle other than 90° with the planar display area; The color deviation detection result includes a second color deviation evaluation parameter X2, and the second color deviation evaluation parameter X2 is calculated based on the first color deviation parameter of the first image area and the second color deviation parameter of the second image area obtained from the second captured image, and the second color deviation evaluation parameter X2 is used to characterize the color deviation degree of the display device at an inclined viewing angle.

11. The method for detecting color deviation of a display device according to any one of claims 2 to 9, wherein The captured image includes a second captured image, and the captured image includes a plurality of second captured images with different shooting directions; the color deviation detection result includes a third color deviation evaluation parameter X3, and the third color deviation evaluation parameter X3 is the sum of the first color deviation evaluation parameter X1 and the second color deviation evaluation parameter X2 corresponding to each of the second captured images.

12. The method for detecting color deviation of a display device according to any one of claims 2 to 9, controlling the display device to display a plurality of test pictures of different single colors. For each test picture of a single color, a third color deviation evaluation parameter X3 is calculated correspondingly. The color deviation detection result includes a fourth color deviation evaluation parameter X4, and the fourth color deviation evaluation parameter X4 is the sum of each of the third color deviation evaluation parameters X3.

13. The method for detecting color deviation of a display device according to claim 10, wherein The curved display areas are arranged on opposite sides of the planar display area, In the second captured image, a partial image of the planar display area image is selected as the first image area, and a partial image of the curved display area image of the curved display area close to the shooting side is selected as the second image area. Both the first image area and the second image area are strip-shaped, and both the first image area and the second image area extend in a second direction, and the second direction is parallel to the extension direction of the curved display area image; The first color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the first image area, the second color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinate, or vertical axis coordinate of the color coordinate of the second image area, and the calculation formula of the second color deviation evaluation parameter X2 is: X2 = |R5 - R6|; or, X2 = |R5 - R6| / R6; wherein, R6 is the parameter value of the first color deviation parameter of the first image area in the second captured image; R5 is the parameter value of the second color deviation parameter of the second image area in the second captured image; or, The first color deviation parameter includes the color coordinates of the first image area, the second color deviation parameter includes the color coordinates of the second image area, and the calculation formula of the second color deviation evaluation parameter X2 is: Wherein, x6 is the horizontal axis coordinate value of the color coordinates of the first image area in the second captured image; y6 is the vertical axis coordinate value of the color coordinates of the first image area in the second captured image; x5 is the horizontal axis coordinate value of the color coordinates of the second image area in the second captured image; y5 is the vertical axis coordinate value of the color coordinates of the second image area in the second captured image.

14. The color deviation detection method of the display device according to claim 10, characterized in that, The curved surface display area is arranged on opposite sides of the flat display area. In the second captured image, a partial image of the flat display area image in the flat display area is selected as the first image area, and a partial image of the curved surface display area image of the curved surface display area close to the shooting side is selected as the second image area. There are M first image areas arranged along a second direction, the second direction is parallel to the extension direction of the curved surface display area image, there are M second image areas arranged along the second direction, and they correspond to each of the first image areas one by one. M is a positive integer greater than or equal to 3. The first color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinates or vertical axis coordinate of the color coordinates of the first image area, the second color deviation parameter includes the brightness, contrast, horizontal axis coordinate of the color coordinates or vertical axis coordinate of the color coordinates of the second image area, and the calculation formula of the second color deviation evaluation parameter X2 is: X2 = |R D1 -R E1 | + … + |R Di -R Ei | + … + |R DM -R EM |; Among them, along the second direction, R D1 , R Di , R DM are respectively the parameter values of the first color deviation parameters of the 1st, the ith, and the Mth first image regions in the second captured image, R E1 , R Ei , R EM are respectively the parameter values of the second color deviation parameters of the 1st, the ith, and the Mth second image regions in the second captured image, 1 < i < M, and i is a positive integer; Or, The first color deviation parameter includes the color coordinates of the first image area, the second color deviation parameter includes the color coordinates of the second image area, and the calculation formula of the second color deviation evaluation parameter X2 is: Among them, along the second direction, x D1 , x Di , x DM are respectively the abscissa coordinate values of the color coordinates of the 1st, the ith, and the Mth first image regions in the second captured image, y D1 , y Di , y DM are respectively the ordinate coordinate values of the color coordinates of the 1st, the ith, and the Mth first image regions in the second captured image, x E1 , x Ei , x EM are respectively the abscissa coordinate values of the color coordinates of the 1st, the ith, and the Mth second image regions in the second captured image, y E1 , y Ei , y EM are respectively the ordinate coordinate values of the color coordinates of the 1st, the ith, and the Mth second image regions in the second captured image, 1 < i < M, and i is a positive integer.

15. A color deviation detection system of a display device, characterized in that, The display device has a flat display area and a curved surface display area, and the color deviation detection system includes: A stage for carrying the display device; A display control device for controlling the display device to display a test screen of a single color; A shooting device for shooting the test screen to obtain a captured image; A processing device for acquiring the captured image, selecting at least one first image area and at least one second image area in the captured image, acquiring the first color deviation parameter of the first image area and the second color deviation parameter of the second image area, and obtaining the color deviation detection result of the display device according to the first color deviation parameter and the second color deviation parameter. Wherein, the captured image includes a flat display area image corresponding to the flat display area and a curved surface display area image corresponding to the curved surface display area. The first image area is located in the flat display area image and is a partial image of the flat display area image; the second image area is located in the curved surface display area image and is a partial image of the curved surface display area image; both the first image area and the second image area are strip-shaped, and both the first image area and the second image area extend along a first direction, and the first direction is parallel to the extension direction of the curved surface display area image.

Images