Screen color correction method and device and storage medium

Abstract

The invention discloses a screen color correction method and device and a storage medium, which are used for improving the correction efficiency. Setting a detection probe and a to-be-calibrated detection instrument, and obtaining a standard screen; determining a detection point coordinate set on the standard screen according to the screen body parameters of the standard screen; lightening the standard screen, displaying a preset XYZ stimulus value standard picture, and adjusting exposure parameters of the detection probe and the detection instrument; detecting XYZ stimulation values of point locations in the detection point coordinate set through the detection probe to generate first color coordinate value data; detecting XYZ stimulus values of point locations in the detection point coordinate set through the detection instrument to generate second color coordinate value data; generating a first correction function set of XYZ stimulus values according to the first color coordinate value data and the second color coordinate value data; and performing screen color correction on a to-be-calibrated detection instrument through the first correction function set.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technologies, and in particular, to a method, device, and storage medium for screen color correction. Background Art

[0002] In the field of display technologies, the color accuracy of a screen is crucial, which is directly related to the user experience and product quality. To ensure the consistency and accuracy of the screen color, it is usually necessary to calibrate the screen. During the color calibration process, specific measuring instruments are required to obtain the tristimulus values of the screen, which are the basis for describing the color characteristics of the screen. In practical applications, the measuring instruments themselves may have errors, resulting in inaccurate tristimulus values. In addition, there may be differences in the color characteristics between different models of screens, as well as between screens of the same model but different production batches or individuals.

[0003] For a chromometer, color luminance correction is a crucial step. Color measurement usually requires the use of specialized measuring instruments, such as a rotary chromometer or an instrument that directly converts RGB to luminance. When these instruments measure the color luminance, it is necessary to calibrate the integrating sphere. However, due to design errors in the filter and Bayer filter, their optical characteristics deviate from the standard CIE curve, resulting in a deviation between the measured result after calibration and the actual color luminance value. Therefore, it is necessary to correct the detection instrument.

[0004] The existing solutions mainly involve using relatively expensive measuring instrument tools, such as a reflection light source box, a four-color integrating sphere, etc., to correct the integrating sphere and 24-color color card with different colors and different color temperatures. However, as the functions of the display screen continue to increase, the number of different functional layers in the display screen gradually increases, and thin-film circuits are also provided in different layers to add more display screen functions. This makes it necessary to spend a large amount of calibration time in the existing technology, reducing the calibration efficiency. Summary of the Invention

[0005] The present application discloses a method, device, and storage medium for screen color correction to improve the calibration efficiency.

[0006] The first aspect of the present application discloses a method for screen color correction, including:

[0007] Set a detection probe and a detection instrument to be calibrated, obtain a standard screen, the detection accuracy of the stimulation value of the detection probe is greater than that of the detection instrument, and the detection probe and the detection instrument to be calibrated are used to detect the stimulation value of the screen;

[0008] Determine the set of detection point coordinates on the standard screen according to the screen parameters of the standard screen;

[0009] Light up the standard screen to display the preset XYZ stimulus value standard screen, and adjust the exposure parameters of the detection probe and the detection instrument;

[0010] Detect the XYZ stimulus values of the points in the detection point coordinate set through the detection probe to generate the first color coordinate value data;

[0011] Detect the XYZ stimulus values of the points in the detection point coordinate set through the detection instrument to generate the second color coordinate value data;

[0012] Generate the first correction function set of XYZ stimulus values according to the first color coordinate value data and the second color coordinate value data;

[0013] Perform screen color correction on the detection instrument to be calibrated through the first correction function set.

[0014] Optionally, after determining the detection point coordinate set on the standard screen according to the screen body parameters of the standard screen, the screen color correction method further includes:

[0015] Relight the standard screen to display the preset RGB stimulus value standard screen, and readjust the exposure parameters of the detection probe and the detection instrument;

[0016] Detect the RGB stimulus values of the points in the detection point coordinate set through the detection probe to generate the third color coordinate value data;

[0017] Detect the RGB stimulus values of the points in the detection point coordinate set through the detection instrument to generate the fourth color coordinate value data;

[0018] Generate the second correction function set of RGB stimulus values according to the third color coordinate value data and the fourth color coordinate value data;

[0019] Perform screen color correction on the detection instrument to be calibrated through the second correction function set.

[0020] Optionally, the standard screen is a display screen with a thin film circuit arranged below the pixel layer, and the screen body parameters include circuit distribution information, circuit reflectivity information, and circuit type information;

[0021] Determining the detection point coordinate set on the standard screen according to the screen body parameters of the standard screen includes:

[0022] Determine at least one non-circuit area and at least one circuit area on the standard screen according to the thin film circuit distribution information of the standard screen;

[0023] Screen the circuit areas according to the circuit reflectivity information and the preset reflectivity threshold to eliminate the circuit areas with reflectivity lower than the reflectivity threshold;

[0024] Divide the circuit area according to the circuit type information to generate at least one gradient circuit area and at least one uniform circuit area;

[0025] Use the method of uniform selection to determine several detection point coordinates on at least one non-circuit area and at least one uniform circuit area respectively;

[0026] Determine the reflectivity gradient direction of the gradient circuit area according to the circuit reflectivity information, and determine several detection point coordinates according to the reflectivity gradient direction and the shape of the gradient circuit area;

[0027] Integrate the detection point coordinates of the non-circuit area, the uniform circuit area and the gradient circuit area to generate a set of detection point coordinates.

[0028] Optionally, after setting the detection probe and the detection instrument to be calibrated and obtaining the standard screen, before determining the set of detection point coordinates on the standard screen according to the screen parameters of the standard screen, the screen color correction method further includes:

[0029] Perform display defect detection and screen body defect detection on the standard screen to generate a display defect area and a screen body defect area;

[0030] Analyze the correction screen specifications of the standard screen according to the display defect area and the screen body defect area;

[0031] When the analysis result of the correction screen specifications indicates that the standard screen does not meet the correction screen specifications, replace another standard screen and re-analyze the correction screen specifications.

[0032] Optionally, after analyzing the correction screen specifications of the standard screen according to the display defect area and the screen body defect area, before determining the set of detection point coordinates on the standard screen according to the screen parameters of the standard screen, the screen color correction method further includes:

[0033] When the analysis result of the correction screen specifications indicates that the standard screen meets the correction screen specifications, determine the display defect area and the screen body defect area as non-acquisition point areas.

[0034] Optionally, after detecting the XYZ stimulus values of the points in the set of detection point coordinates by the detection instrument to generate the second color coordinate value data, before generating the first correction function set of the XYZ stimulus values according to the first color coordinate value data and the second color coordinate value data, the screen color correction method further includes:

[0035] Adjust the circuit area stimulus value of the first color coordinate value data according to the circuit reflectivity information;

[0036] Adjust the circuit area stimulus value of the second color coordinate value data according to the circuit reflectivity information.

[0037] The second aspect of the present application discloses a device for screen color correction, including:

[0038] A setting unit, configured to set a detection probe and a detection instrument to be calibrated, obtain a standard screen, the detection accuracy of the stimulation value of the detection probe is greater than that of the detection instrument, and the detection probe and the detection instrument to be calibrated are used to detect the stimulation value of the screen;

[0039] A first determination unit, configured to determine a set of detection point coordinates on the standard screen according to the screen parameters of the standard screen;

[0040] A first preprocessing unit, configured to light up the standard screen, display a preset XYZ stimulation value standard picture, and adjust the exposure parameters of the detection probe and the detection instrument;

[0041] A first generation unit, configured to detect the XYZ stimulation value of the points in the set of detection point coordinates through the detection probe, and generate first color coordinate value data;

[0042] A second generation unit, configured to detect the XYZ stimulation value of the points in the set of detection point coordinates through the detection instrument, and generate second color coordinate value data;

[0043] A third generation unit, configured to generate a first set of correction functions for the XYZ stimulation value according to the first color coordinate value data and the second color coordinate value data;

[0044] A first correction unit, configured to perform screen color correction on the detection instrument to be calibrated through the first set of correction functions.

[0045] Optionally, after the first determination unit, the screen color correction device further includes:

[0046] A second preprocessing unit, configured to light up the standard screen again, display a preset RGB stimulation value standard picture, and readjust the exposure parameters of the detection probe and the detection instrument;

[0047] A fourth generation unit, configured to detect the RGB stimulation value of the points in the set of detection point coordinates through the detection probe, and generate third color coordinate value data;

[0048] A fifth generation unit, configured to detect the RGB stimulation value of the points in the set of detection point coordinates through the detection instrument, and generate fourth color coordinate value data;

[0049] A sixth generation unit, configured to generate a second set of correction functions for the RGB stimulation value according to the third color coordinate value data and the fourth color coordinate value data;

[0050] A second correction unit, configured to perform screen color correction on the detection instrument to be calibrated through the second set of correction functions.

[0051] Optionally, the standard screen is a display screen with a thin-film circuit disposed below the pixel layer, and the screen body parameters include circuit distribution information, circuit reflectivity information, and circuit type information;

[0052] The first determination unit includes:

[0053] Determine at least one non-circuit area and at least one circuit area on the standard screen according to the thin-film circuit distribution information of the standard screen;

[0054] Screen the circuit areas according to the circuit reflectivity information and a preset reflectivity threshold to screen out the circuit areas with a reflectivity lower than the reflectivity threshold;

[0055] Divide the circuit areas according to the circuit type information to generate at least one gradient circuit area and at least one uniform circuit area;

[0056] Use the method of uniform selection to determine several detection point coordinates on at least one non-circuit area and at least one uniform circuit area respectively;

[0057] Determine the reflectivity gradient direction of the gradient circuit area according to the circuit reflectivity information, and determine several detection point coordinates according to the reflectivity gradient direction and the shape of the gradient circuit area;

[0058] Integrate the detection point coordinates of the non-circuit area, the uniform circuit area, and the gradient circuit area to generate a detection point coordinate set.

[0059] Optionally, after the setting unit and before the first determination unit, the screen color correction device further includes:

[0060] The seventh generation unit is used to perform display defect detection and screen body defect detection on the standard screen to generate a display defect area and a screen body defect area;

[0061] The analysis unit is used to analyze the correction screen specifications of the standard screen according to the display defect area and the screen body defect area;

[0062] The replacement unit is used to replace another standard screen to re-analyze the correction screen specifications when the correction screen specifications analysis result indicates that the standard screen does not meet the correction screen specifications.

[0063] Optionally, after the analysis unit and before the first determination unit, the screen color correction device further includes:

[0064] The second determination unit is used to determine the display defect area and the screen body defect area as non-acquisition point areas when the correction screen specifications analysis result indicates that the standard screen meets the correction screen specifications.

[0065] Optionally, after the third generation unit and before the first correction unit, the screen color correction device further includes:

[0066] A first adjustment unit for adjusting the circuit area stimulation value of the first color coordinate value data according to the circuit reflectivity information;

[0067] A second adjustment unit for adjusting the circuit area stimulation value of the second color coordinate value data according to the circuit reflectivity information.

[0068] A third aspect of the present application provides another screen color correction device, including:

[0069] A processor, a memory, an input / output unit, and a bus;

[0070] The processor is connected to the memory, the input / output unit, and the bus;

[0071] The memory stores a program, and the processor calls the program to execute the screen color correction method as described in the first aspect and any optional screen color correction method of the first aspect.

[0072] A fourth aspect of the present application provides a computer-readable storage medium, on which a program is stored, and when the program is executed on a computer, it executes the screen color correction method as described in the first aspect and any optional screen color correction method of the first aspect.

[0073] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0074] The present application first improves the calibration method, no longer limited to only measuring two points at the center of the standard screen, but extending to the edges and corners of the screen for multi-point measurement. In this way, the color characteristic differences of the screen can be captured more comprehensively, so as to more accurately reflect the overall color performance of the screen, realize more refined and all-round color correction, and improve the user experience and product quality.

[0075] Secondly, by using the instrument to be calibrated and the probe to measure the tristimulus values of two points at the center of the standard screen multiple times, and calculating the proportional coefficient and constant based on the binary linear equation, the color difference between the instrument to be calibrated and the standard screen can be reflected more accurately. This precise calibration process ensures that the color performance of the screens to be tested of the same model is more consistent with the standard screen, improving the accuracy and consistency of color calibration.

[0076] Finally, by switching the color of the standard screen to different preset pictures and calculating the proportional coefficient and constant corresponding to each color respectively, the color characteristic differences of the screen can be captured more comprehensively. This comprehensive calibration process helps to achieve all-round and precise correction of the screen color, improving the comprehensiveness of color calibration. Description of the Drawings

[0077] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0078] Figure 1 Schematic diagram of an embodiment of the screen color correction method of the present application;

[0079] Figure 2 Schematic diagram of an embodiment of the screen color correction method of the present application regarding RGB stimulus values;

[0080] Figure 3 Schematic diagram of an embodiment of the method for determining the set of detection point coordinates of the present application;

[0081] Figure 4 Schematic diagram of another embodiment of the method for analyzing the correction screen specifications of the present application;

[0082] Figure 5 Schematic diagram of another embodiment of the method for determining the non - acquisition point area of the present application;

[0083] Figure 6 Schematic diagram of another embodiment of the method for adjusting the stimulus value of the circuit area of the present application;

[0084] Figure 7 Schematic diagram of an embodiment of the screen color correction device of the present application;

[0085] Figure 8 Schematic diagram of an embodiment of the screen color correction device of the present application. Detailed implementation manners

[0086] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are presented to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well - known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0087] It should be understood that when used in the specification of the present application and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0088] It should also be understood that the term "and / or" as used in the specification and appended claims of this application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0089] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrases "if determined" or "if [the described condition or event] is detected" can be interpreted as meaning "once determined" or "in response to determining" or "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]" depending on the context.

[0090] In addition, in the description of the specification and appended claims of this application, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0091] Reference to "one embodiment" or "some embodiments" or the like described in the specification of this application means that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0092] In the prior art, for a colorimeter, color luminance correction is a crucial step. Color measurement usually requires the use of specialized measuring instruments, such as a rotary colorimeter or an instrument that directly converts RGB to a bright colorimeter. When these instruments perform color luminance measurement, they need to calibrate the integrating sphere. However, due to design errors in the filter and the Bayer filter, there are differences between their optical characteristics and the standard CIE curve, resulting in a deviation between the measured result after calibration and the actual color luminance value. Therefore, it is necessary to correct the detection instrument.

[0093] The existing solutions mainly involve using relatively expensive measuring instrument tools, such as a reflection light source box, a four-color integrating sphere, etc., to correct the integrating sphere of different colors and different color temperatures and the 24-color color card. However, as the functions of the display screen continue to increase, the number of different functional layers in the display screen gradually increases, and thin-film circuits are also provided in different layers to add more display screen functions. This makes it necessary to spend a large amount of calibration time in the prior art, reducing the efficiency of correction.

[0094] Based on this, the present application discloses a screen color correction method, device and storage medium, which are used to improve the efficiency of correction.

[0095] Next, the technical solutions in the present application will be clearly and completely described in conjunction with 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0096] The method of the present application can be applied to a server, device, terminal or other devices with logical processing capabilities. The present application does not make any limitations in this regard. For the convenience of description, the following describes the execution subject as a terminal.

[0097] Please refer to Figure 1 , an embodiment of a screen color correction method provided by the present application includes:

[0098] 101. Set a detection probe and a detection instrument to be calibrated, obtain a standard screen, the detection accuracy of the stimulus value of the detection probe is greater than that of the detection instrument, and the detection probe and the detection instrument to be calibrated are used to detect the stimulus value of the screen;

[0099] 102. Determine the set of detection point coordinates on the standard screen according to the screen parameters of the standard screen;

[0100] 103. Light up the standard screen, display a preset XYZ stimulus value standard screen, and adjust the exposure parameters of the detection probe and the detection instrument;

[0101] 104. Detect the XYZ stimulus value of the points in the set of detection point coordinates through the detection probe to generate the first color coordinate value data;

[0102] 105. Detect the XYZ stimulus value of the points in the set of detection point coordinates through the detection instrument to generate the second color coordinate value data;

[0103] 106. Generate a first correction function set of XYZ stimulus values according to the first color coordinate value data and the second color coordinate value data;

[0104] 107. Perform screen color correction on the detection instrument to be calibrated through the first correction function set.

[0105] In this embodiment, first, place the detection probe and the detection instrument to be calibrated in front of the standard screen, ensuring that the distances and angles between the two and the screen are the same, and ensuring that the detection accuracy of the stimulation values of the detection probe is greater than that of the detection instrument to be calibrated. The screen parameters of the standard screen include screen resolution, screen size, screen ratio, and pixel density. Determine the detection area based on these screen parameters. According to the screen resolution and the detection area, divide the detection area into several grids, where the size of each grid can be adjusted according to the detection accuracy requirements. The center position of each grid is a detection point. Record the coordinates of all detection points as a set, and these coordinate points should be evenly distributed on the screen to cover the entire display area.

[0106] Light up the standard screen to display the preset XYZ stimulation value standard picture. By adjusting the exposure parameters of the detection probe and the detection instrument, ensure the accuracy and consistency of the detection results. Use the detection probe to detect the XYZ stimulation values of each point in the detection point coordinate set to generate the first color coordinate value data. Use the detection instrument to detect the XYZ stimulation values of each point in the detection point coordinate set to generate the second color coordinate value data. Generate the first correction function set of XYZ stimulation values based on the first color coordinate value data and the second color coordinate value data. Specifically, obtain the first correction function set by using a binary linear equation, that is, y = kx + b. The function set obtained by the binary linear equation is used to describe the color coordinate value difference between the detection instrument and the detection probe.

[0107] Specifically, substitute the first color coordinate value data and the second color coordinate value data into the binary linear equation to obtain the first correction function set, that is, it is realized through the following formula:

[0108] y 1 =k 1 x 1 +b 1

[0109] y 2 =k 2 x 2 +b 2

[0110] y 3 =k 3 x 3 +b 3

[0111] where k is the proportionality coefficient and b is the intercept. y 1 、y 2 、y 3 are respectively three stimulation values in the first correction function set, (x 1 ,y 1) are (X1, X1'), (X2, X2')...(XN, XN'), (x 2 , y 2 ) are (Y1, Y1'), (Y2, Y2')...(YN, YN'), (x 3 , y 3 ) are (Z1, Z1'), (Z2, Z2')...(ZN, ZN').

[0112] Please refer to Figure 2 , this application provides an embodiment of a method for correcting screen color of RGB stimulus values, including:

[0113] 201. Re-light the standard screen, display the preset RGB stimulus value standard screen, and re-adjust the exposure parameters of the detection probe and the detection instrument;

[0114] 202. Detect the RGB stimulus values of the points in the detection point coordinate set through the detection probe, and generate the third color coordinate value data;

[0115] 203. Detect the RGB stimulus values of the points in the detection point coordinate set through the detection instrument, and generate the fourth color coordinate value data;

[0116] 204. Generate the second correction function set of RGB stimulus values according to the third color coordinate value data and the fourth color coordinate value data;

[0117] 205. Perform screen color correction on the detection instrument to be calibrated through the second correction function set.

[0118] Re-light the standard screen, display the preset RGB stimulus value standard screen, and ensure the accuracy and consistency of the detection results by adjusting the exposure parameters of the detection probe and the detection instrument.

[0119] According to the detection point coordinate set, position the detection probe and the detection instrument to the position of each detection point in turn. At each detection point position, detect the RGB stimulus values through the detection probe and the detection instrument. Ensure that both the probe and the detection instrument maintain an appropriate distance and angle from the screen surface to avoid detection errors. The detected values generate the third color coordinate value data and the fourth color coordinate value data respectively. According to the third color coordinate value data and the fourth color coordinate value data, generate the second correction function set of RGB stimulus values. Specifically, use a binary linear equation to obtain the second correction function set, that is, y = kx + b. The function set obtained through the binary linear equation is used to describe the color coordinate value difference between the detection instrument and the detection probe.

[0120] Specifically, substituting the third color coordinate value data and the fourth color coordinate value data into a binary linear equation to obtain a second set of correction functions, which is achieved through the following formula:

[0121] y 4 =k 4 x 4 +b 4

[0122] y 5 =k 5 x 5 +b 5

[0123] y 6 =k 6 x 6 +b 4

[0124] where k is the proportionality coefficient and b is the intercept, and y 4 、y 5 、y 6 are respectively three stimulus values in the first set of correction functions, (x 4 , y 4 ) is (X1, X1'), (X2, X2')...(XN, XN'), (x 5 , y 5 ) is (Y1, Y1'), (Y2, Y2')...(YN, YN'), (x 6 , y 6 ) is (Z1, Z1'), (Z2, Z2')...(ZN, ZN').

[0125] Please refer to Figure 3 , this application provides an embodiment of a method for determining a set of detection point coordinates, including:

[0126] 301. Determine at least one non-circuit area and at least one circuit area on the standard screen according to the thin-film circuit distribution information of the standard screen;

[0127] 302. Screen the circuit areas according to the circuit reflectivity information and a preset reflectivity threshold to filter out the circuit areas with reflectivity lower than the reflectivity threshold;

[0128] 303. Divide the circuit areas according to the circuit type information to generate at least one gradient circuit area and at least one uniform circuit area;

[0129] 304. Use the method of uniform selection to determine several detection point coordinates on at least one non-circuit area and at least one uniform circuit area respectively;

[0130] 305. Determine a reflectivity gradient direction of the gradient circuit region according to the circuit reflectivity information, and determine coordinates of a plurality of detection points according to the reflectivity gradient direction and the shape of the gradient circuit region;

[0131] 306. Integrate the detection point coordinates of the non-circuit area, the uniform circuit area, and the gradient circuit area to generate a detection point coordinate set.

[0132] In this embodiment, the detection of the stimulus value will be affected by external factors, especially the influence of the display screen itself. The standard screen is a display screen with a thin circuit arranged under the pixel layer. With the development of display screens, the functionality of display screens has gradually increased, and its structure has gradually become more complex, which is mainly reflected in the increase in the number of layers of the functional layer of the display screen, the degree of curvature of the screen, the splicing between the screens, and the addition of internal circuits between the functional layers. In this embodiment, the display screen with an internal circuit is mainly discussed, and it is a thin circuit under the pixel layer. The thin circuit belongs to a circuit structure with a small thickness, which is arranged under the pixel layer. While providing the function of the display screen, it minimizes the light reflection effect caused by the pixel layer when it is lit. However, with the complexity of the function, the complexity of some thin circuits becomes higher, and the thickness inevitably reaches a level that may affect the pixel layer, and the metal material used in the thin circuit itself has a strong reflective ability. Although the human eye may not be able to easily detect the light reflection of the internal thin circuit, for the detection instrument, this type of light reflection can affect the detection result.

[0133] In this embodiment, in order to reduce the influence of the thin-film circuit during the correction of the stimulus value of the detection instrument, it is first necessary to determine the circuit area and non-circuit area of ​​the standard screen. Specifically, at least one non-circuit area and at least one circuit area on the standard screen are determined based on the thin-film circuit distribution information of the standard screen. Usually, a light source of a preset size is applied to the back of the display screen, and then a sampling camera is used to shoot to increase the difference between the internal thin-film circuit and the display screen, and then the captured image is binarized to determine the circuit area and non-circuit area on the captured screen. At this time, each pixel on the standard screen has its own area.

[0134] Next, the terminal screens the circuit area according to the circuit reflectivity information and the preset reflectivity threshold to screen out the circuit area with a reflectivity lower than the reflectivity threshold. Because there are areas of different thickness in the sheet circuit, and the metal material of each area is different, the reflectivity of different areas is different. It is necessary to determine the part of the circuit area where both thickness and reflectivity are achieved. In the process of sheet circuit production, the corresponding reflectivity is generated according to the thickness information and material information of different parts of the sheet circuit. This is the circuit reflectivity information. Only when the reflectivity of a certain area reaches the preset reflectivity threshold, it is considered that the area will cause light reflection.

[0135] Next, the terminal divides the circuit area according to the circuit type information, generating at least one gradient circuit area and at least one uniform circuit area. In each small area of the thin-film circuit, most of it is an integral part with uniform thickness (such as a metal line only for signal transmission), with uniform reflectivity and thickness. However, some parts have the same material but the thickness varies from thickness A to thickness B (gradient circuit area, with reflectivity and thickness varying gradually), and the reflectivity is within an interval. Circuit type learning mainly records the thickness changes in each area of the thin-film circuit during the production process to determine whether each part of the circuit belongs to a uniform circuit area or a gradient circuit area. And the circuit reflectivity information will record the reflectivity of each uniform circuit area and the reflectivity interval of the gradient circuit area.

[0136] In this embodiment, since it is necessary to determine the detection points, the terminal uses the method of uniform selection to determine several detection point coordinates on at least one non-circuit area and at least one uniform circuit area respectively. The method of uniform selection is mainly equidistant sampling. For each non-circuit area (there will be barriers between the non-circuit part and the circuit part, resulting in multiple non-circuit areas), at least two points are determined, and for each uniform circuit area, at least two points are also sampled. During the correction process, the non-circuit area is corrected separately for this area, and the uniform circuit area is also corrected separately for this area.

[0137] The terminal determines the reflectivity gradient direction of the gradient circuit area according to the circuit reflectivity information, and determines several detection point coordinates according to the reflectivity gradient direction and the shape of the gradient circuit area. Since linear fitting needs to be performed on the stimulus values collected at the points later, multiple points need to be collected on the gradient circuit area. And due to the influence of the gradient circuit, the stimulus values are affected differently. For example: in a gradient circuit area where the thickness decreases from top to bottom, the reflectivity also decreases from top to bottom. The determined reflectivity gradient direction is from top to bottom (the thickness change is linear, and the reflectivity change is also linear). Points are sampled in this direction, and 3 points are collected, one at the top of the gradient circuit area (taking the maximum reflectivity), one at the bottom of the gradient circuit area (taking the minimum reflectivity), and one in the middle (taking the middle value of the reflectivity interval).

[0138] It should be noted that the above example is for the case where the thickness change is linear. In many cases, the thickness change is not linear (then the reflectivity is also not linear), so it is necessary to obtain the curve function of the thickness, convert it into the curve function of the reflectivity, and then perform point sampling.

[0139] Finally, the terminal integrates the detection point coordinates of the non-circuit area, the uniform circuit area, and the gradient circuit area to generate a set of detection point coordinates.

[0140] Please refer to Figure 4, an embodiment of a method for analyzing the correction screen specification provided by this application includes:

[0141] 401. Perform display defect detection and screen body defect detection on the standard screen to generate a display defect area and a screen body defect area;

[0142] 402. Analyze the correction screen specification of the standard screen based on the display defect area and the screen body defect area;

[0143] 403. When the analysis result of the correction screen specification indicates that the standard screen does not meet the correction screen specification, replace another standard screen and re - perform the correction screen specification analysis.

[0144] In this embodiment, the terminal performs display defect detection and screen body defect detection on the standard screen to generate a display defect area and a screen body defect area. The display defect is a defect (such as distortion, non - lighting point, etc.) detected during the lighting process of the standard screen, and the screen body defect is a defect in the structure of the display screen itself (such as chipping, scratching, etc.). The terminal analyzes the correction screen specification of the standard screen based on the display defect area and the screen body defect area. Because when there is a certain type of defect, such as a scratch, the entire screen itself needs to be scrapped and cannot be used as a standard screen for detection. Or when some defects are exactly located in the circuit area, it greatly increases the subsequent stimulation value detection and correction degree. When the analysis result of the correction screen specification indicates that the standard screen does not meet the correction screen specification, replace another standard screen and re - perform the correction screen specification analysis.

[0145] Please refer to Figure 5 , an embodiment of a method for determining a non - acquisition point area provided by this application includes:

[0146] 501. When the analysis result of the correction screen specification indicates that the standard screen meets the correction screen specification, determine the display defect area and the screen body defect area as non - acquisition point areas.

[0147] When the analysis result of the correction screen specification indicates that the standard screen meets the correction screen specification, determine the display defect area and the screen body defect area as non - acquisition point areas. That is, when there are some defects in the display screen that do not affect the circuit area and the influence range is small, only need to determine the display defect area and the screen body defect area as non - acquisition point areas, and do not collect the points in these two areas as detection points to improve the detection accuracy.

[0148] Please refer to Figure 6 , an embodiment of a method for adjusting the stimulation value of the circuit area provided by this application includes:

[0149] 601. Adjust the stimulation value of the circuit area for the first color coordinate value data according to the circuit reflectivity information;

[0150] 602. Adjust the circuit area stimulation value for the second color coordinate value data according to the circuit reflectivity information.

[0151] In this embodiment, after the first color coordinate value data is collected, the first color coordinate value data includes color coordinate value data of non-circuit areas (the reflectivity lower than the preset value is also recognized as a non-circuit area), color coordinate value data of uniform circuit areas, and color coordinate value data of gradient circuit areas. At this time, it is necessary to adjust the color coordinate value data of the uniform circuit areas and the color coordinate value data of the gradient circuit areas according to the reflectivity. The adjustment formula is as follows:

[0152]

[0153] Among them, M 1 is the stimulation value after adjustment of the target point, M 0 is the stimulation value before adjustment of the target point. The stimulation value can be the XYZ stimulation value or the RGB stimulation value, which is not limited here. β is the reflectivity corresponding to the target point, and l is a constant. When adjusting different stimulation values, the influence brought by the reflectivity is different. Therefore, the constants l corresponding to different stimulation values are different and belong to the artificial experience setting.

[0154] Please refer to Figure 7 , an embodiment of a screen color correction device provided by the present application includes:

[0155] A setting unit 701, configured to set a detection probe and a detection instrument to be calibrated, obtain a standard screen, the stimulation value detection accuracy of the detection probe is greater than that of the detection instrument, and the detection probe and the detection instrument to be calibrated are used to detect the stimulation value of the screen;

[0156] A seventh generation unit 702, configured to perform display defect detection and screen body defect detection on the standard screen, and generate a display defect area and a screen body defect area;

[0157] An analysis unit 703, configured to analyze the correction screen specifications of the standard screen according to the display defect area and the screen body defect area;

[0158] A replacement unit 704, configured to replace another standard screen to re-perform the correction screen specification analysis when the correction screen specification analysis result indicates that the standard screen does not meet the correction screen specifications;

[0159] A second determination unit 705, configured to determine the display defect area and the screen body defect area as non-acquisition point areas when the correction screen specification analysis result indicates that the standard screen meets the correction screen specifications;

[0160] A first determination unit 706, configured to determine the set of detection point coordinates on the standard screen according to the screen body parameters of the standard screen;

[0161] The first determination unit 706 includes:

[0162] Determine at least one non - circuit area and at least one circuit area on the standard screen according to the thin - film circuit distribution information of the standard screen;

[0163] Screen the circuit areas according to the circuit reflectivity information and a preset reflectivity threshold to eliminate the circuit areas with reflectivity lower than the reflectivity threshold;

[0164] Divide the circuit areas according to the circuit type information to generate at least one gradient circuit area and at least one uniform circuit area;

[0165] Use the method of uniform selection to determine several detection point coordinates on at least one non - circuit area and at least one uniform circuit area respectively;

[0166] Determine the reflectivity gradient direction of the gradient circuit area according to the circuit reflectivity information, and determine several detection point coordinates according to the reflectivity gradient direction and the shape of the gradient circuit area;

[0167] Integrate the detection point coordinates of the non - circuit area, the uniform circuit area and the gradient circuit area to generate a detection point coordinate set.

[0168] The first pre - processing unit 707 is used to light up the standard screen, display a preset XYZ stimulus value standard picture, and adjust the exposure parameters of the detection probe and the detection instrument;

[0169] The first generation unit 708 is used to detect the XYZ stimulus values of the points in the detection point coordinate set through the detection probe to generate first color coordinate value data;

[0170] The second generation unit 709 is used to detect the XYZ stimulus values of the points in the detection point coordinate set through the detection instrument to generate second color coordinate value data;

[0171] The third generation unit 710 is used to generate a first correction function set of XYZ stimulus values according to the first color coordinate value data and the second color coordinate value data;

[0172] The first adjustment unit 711 is used to adjust the stimulus values of the circuit areas for the first color coordinate value data according to the circuit reflectivity information;

[0173] The second adjustment unit 712 is used to adjust the stimulus values of the circuit areas for the second color coordinate value data according to the circuit reflectivity information;

[0174] The first correction unit 713 is used to perform screen color correction on the detection instrument to be calibrated through the first correction function set;

[0175] The second preprocessing unit 714 is configured to relight the standard screen, display a preset RGB stimulus value standard screen, and readjust the exposure parameters of the detection probe and the detection instrument;

[0176] The fourth generation unit 715 is configured to detect the RGB stimulus values of the points in the detection point coordinate set through the detection probe, and generate third color coordinate value data;

[0177] The fifth generation unit 716 is configured to detect the RGB stimulus values of the points in the detection point coordinate set through the detection instrument, and generate fourth color coordinate value data;

[0178] The sixth generation unit 717 is configured to generate a second correction function set of RGB stimulus values according to the third color coordinate value data and the fourth color coordinate value data;

[0179] The second correction unit 718 is configured to perform screen color correction on the detection instrument to be calibrated through the second correction function set.

[0180] Please refer to Figure 8 , this application provides a screen color correction device, including:

[0181] A processor 801, a memory 802, an input / output unit 803, and a bus 804.

[0182] The processor 801 is connected to the memory 802, the input / output unit 803, and the bus 804.

[0183] The memory 802 stores a program, and the processor 801 calls the program to execute the screen color correction method as described in Figure 1 , Figure 2 and Figure 3 , Figure 4 , Figure 5 and Figure 6 .

[0184] This application provides a computer-readable storage medium, on which a program is stored, and when the program is executed on a computer, it executes the screen color correction method as described in Figure 1 , Figure 2 and Figure 3 , Figure 4 , Figure 5 and Figure 6 .

[0185] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments, and will not be described herein again.

[0186] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0187] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0188] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0189] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

Claims

1. A screen color correction method, characterized in that: include: A detection probe and a detection instrument to be calibrated are set to obtain a standard screen, wherein the detection accuracy of the stimulation value of the detection probe is greater than that of the detection instrument, and the detection probe and the detection instrument to be calibrated are used to detect the stimulation value of the screen; Determine a set of detection point coordinates on the standard screen according to screen parameters of the standard screen; Lighting up the standard screen to display a preset XYZ stimulus value standard screen, and adjusting the exposure parameters of the detection probe and the detection instrument; Performing XYZ stimulus value detection on the points in the detection point coordinate set by the detection probe to generate first color coordinate value data; Performing XYZ stimulus value detection on the points in the detection point coordinate set by the detection instrument to generate second color coordinate value data; generating a first correction function set of XYZ stimulus values ​​according to the first color coordinate value data and the second color coordinate value data; The screen color correction of the detection instrument to be calibrated is performed by using the first correction function set.

2. The screen color correction method according to claim 1, characterized in that: After determining the detection point coordinate set on the standard screen according to the screen parameters of the standard screen, the screen color correction method further includes: Relighting the standard screen to display a preset RGB stimulus value standard screen, and re-adjusting the exposure parameters of the detection probe and the detection instrument; The detection probe detects the RGB stimulus values ​​of the points in the detection point coordinate set to generate third color coordinate value data; The detection instrument detects the RGB stimulus values ​​of the points in the detection point coordinate set to generate fourth color coordinate value data; generating a second correction function set of RGB stimulus values ​​according to the third color coordinate value data and the fourth color coordinate value data; The screen color correction is performed on the detection instrument to be calibrated by using the second correction function set.

3. The screen color correction method according to any one of claims 1 to 2, characterized in that: The standard screen is a display screen with a thin circuit disposed below the pixel layer, and the screen parameters include circuit distribution information, circuit reflectivity information, and circuit type information; Determining a set of detection point coordinates on the standard screen according to the screen parameters of the standard screen includes: determining at least one non-circuit area and at least one circuit area on the standard screen according to the sheet circuit distribution information of the standard screen; Screening the circuit area according to the circuit reflectivity information and a preset reflectivity threshold value to screen out the circuit area whose reflectivity is lower than the reflectivity threshold value; Dividing the circuit area according to the circuit type information to generate at least one gradual circuit area and at least one uniform circuit area; Using a uniform selection method, coordinates of a plurality of detection points are determined respectively on at least one non-circuit area and at least one uniform circuit area; Determine a reflectivity gradient direction of the gradient circuit area according to the circuit reflectivity information, and determine coordinates of a plurality of detection points according to the reflectivity gradient direction and the shape of the gradient circuit area; The detection point coordinates of the non-circuit area, the uniform circuit area and the gradient circuit area are integrated to generate a detection point coordinate set.

4. The screen color correction method according to claim 3, characterized in that: After setting the detection probe and the detection instrument to be calibrated and obtaining the standard screen, and before determining the detection point coordinate set on the standard screen according to the screen parameters of the standard screen, the screen color correction method further includes: Performing display defect detection and screen body defect detection on the standard screen to generate a display defect area and a screen body defect area; Analyzing the correction screen specifications of the standard screen according to the display defect area and the screen body defect area; When the correction screen specification analysis result indicates that the standard screen does not meet the correction screen specification, another standard screen is replaced and the correction screen specification analysis is performed again.

5. The screen color correction method according to claim 4, characterized in that: After analyzing the correction screen specifications of the standard screen according to the display defect area and the screen body defect area, and before determining the detection point coordinate set on the standard screen according to the screen body parameters of the standard screen, the screen color correction method further includes: When the correction screen specification analysis result indicates that the standard screen reaches the correction screen specification, the display defect area and the screen body defect area are determined as non-collection point areas.

6. The screen color correction method according to claim 3, characterized in that: After the detection of XYZ stimulus values ​​for the points in the detection point coordinate set by the detection instrument to generate second color coordinate value data, and before generating a first correction function set of XYZ stimulus values ​​according to the first color coordinate value data and the second color coordinate value data, the screen color correction method further includes: Adjusting the circuit area stimulus value of the first color coordinate value data according to the circuit reflectivity information; The circuit area stimulation value is adjusted for the second color coordinate value data according to the circuit reflectivity information.

7. A screen color correction device, characterized in that: include: A setting unit, used for setting a detection probe and a detection instrument to be calibrated, and obtaining a standard screen, wherein the detection probe has a stimulus value detection accuracy greater than that of the detection instrument, and the detection probe and the detection instrument to be calibrated are used to detect the stimulus value of the screen; A first determining unit, configured to determine a set of detection point coordinates on the standard screen according to screen parameters of the standard screen; A first preprocessing unit, used to light up the standard screen, display a preset XYZ stimulus value standard screen, and adjust exposure parameters of the detection probe and the detection instrument; A first generating unit, configured to detect XYZ stimulus values ​​of points in the detection point coordinate set through the detection probe, and generate first color coordinate value data; A second generating unit, configured to detect XYZ stimulus values ​​of points in the detection point coordinate set by using the detection instrument to generate second color coordinate value data; a third generating unit, configured to generate a first correction function set of XYZ stimulus values ​​according to the first color coordinate value data and the second color coordinate value data; The first correction unit is used to perform screen color correction on the detection instrument to be calibrated by using the first correction function set.

8. The screen color correction device according to claim 7, characterized in that: The screen color correction device also includes: A second preprocessing unit is used to relight the standard screen, display a preset RGB stimulus value standard screen, and readjust the exposure parameters of the detection probe and the detection instrument; A fourth generating unit, configured to detect RGB stimulus values ​​of points in the detection point coordinate set through the detection probe, and generate third color coordinate value data; A fifth generating unit, configured to detect RGB stimulus values ​​of points in the detection point coordinate set by using the detection instrument to generate fourth color coordinate value data; A sixth generating unit, configured to generate a second correction function set of RGB stimulus values ​​according to the third color coordinate value data and the fourth color coordinate value data; The second correction unit is used to perform screen color correction on the detection instrument to be calibrated by using the second correction function set.

9. A screen color correction device, characterized in that: include: Processor, memory, input-output unit, and bus; The processor is connected to the memory, the input and output unit, and the bus; The memory stores a program, and the processor calls the program to execute the screen color correction method according to any one of claims 1 to 6.

10. A computer-readable storage medium having a program stored thereon, wherein the program, when executed on a computer, performs the screen color correction method according to any one of claims 1 to 6.

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