Processing method for improving color accuracy of liquid crystal display equipment

Abstract

The invention discloses a processing method for improving color accuracy of liquid crystal display equipment, which comprises the following steps of: testing an original color gamut of a liquid crystal display television screen, selecting a standard reference color gamut matched with the original color gamut, drawing triangles of the original color gamut and the standard color gamut of the screen in the same coordinate system, and obtaining the color accuracy of the liquid crystal display equipment according to an autonomously designed algorithm. A new target color gamut triangle is calculated and generated, finally, matching calculation is conducted on points exceeding the original color gamut range of the screen and the original color gamut of the screen and the standard color gamut through a mapping algorithm, a new target color gamut is generated, and the new target color gamut is matched into the target color gamut range through the mapping algorithm to be displayed, so that the color restoration accuracy of the display equipment is improved; and the user use color experience of the liquid crystal display equipment is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid crystal display, and in particular to a processing method for improving color accuracy of a liquid crystal display device. BACKGROUND

[0002] As an important device for video entertainment, the screen color accuracy of a liquid crystal display device directly determines the realism of picture restoration, affects the display effect of picture color and the user's viewing experience. For example, the screen color accuracy of a liquid crystal television directly affects the use and perception of the liquid crystal television. The color accuracy of a liquid crystal display device is affected by many factors such as color gamut, color temperature, gamma value, brightness and contrast, color uniformity, response time, viewing angle and color precision. Among them, the color gamut refers to the range of colors that a display can display. Common color gamut standards include sRGB, Adobe RGB and DCI-P3. Different color gamut standards have different color types, color ranges and color accuracies. The color accuracy refers to the ability of a display or a color standard to accurately restore the original color of an image. It is usually measured by the ΔE value. The smaller the ΔE value, the more accurate the color. Different color gamut standards are suitable for different application scenarios. Selecting the appropriate color gamut standard can ensure the best visual effect in a specific scenario.

[0003] When a liquid crystal display device is applied to a general application scenario or the color gamut deviates from the standard color gamut, in order to improve the accuracy of the screen color, it is usually necessary to correct the color gamut of the screen. For example, the patent document with the publication number CN120148437A discloses a color gamut debugging method, device, system and storage medium. The standard gamma group data is obtained by calibrating the gamma curve and converting the gamma array. Then, the color gamut coordinate array of the target color gamut is calculated according to the standard gamma group data. The color gamut coordinate array is written into the drive mainboard for color gamut calibration. Then, the average color deviation is calculated. Further, whether the average color deviation meets the preset threshold is judged to determine whether the debugging is qualified. Such a traditional color gamut calibration method has the problem of low accuracy of color gamut calibration due to the influence of the calibration related to the gamma curve or the brightness factor or the change of the scene, which leads to low matching degree between the calibrated color gamut and the standard color gamut. SUMMARY

[0004] The present application aims at the problem of low accuracy of color gamut calibration due to the low matching degree between the calibrated color gamut and the standard color gamut in the prior art, and provides a processing method for improving the color accuracy of a liquid crystal display device.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0006] A processing method for improving the color accuracy of a liquid crystal display device, comprising the following steps:

[0007] S1, test the original color gamut of the liquid crystal display device; select a standard color gamut matched with the liquid crystal display device; draw an original color gamut area triangle and a standard color gamut area triangle in the same coordinate system respectively;

[0008] S2, draw a target color gamut area triangle according to the area deviation of the original color gamut and the standard color gamut area triangle;

[0009] S3, match and map the super color gamut points in the original color gamut range to the target color gamut area triangle by a coordinate mapping algorithm, so as to display the color in the color gamut range of the target color gamut.

[0010] The processing method for improving the color accuracy of the liquid crystal display device can draw the coordinates of the color gamut into a triangle graph, draw a target color gamut area triangle according to the area deviation of the two triangle graphs, match and calculate the original color gamut and the standard color gamut of the liquid crystal display device, generate a new target color gamut, match and map the super color gamut points in the original color gamut range to the target color gamut area triangle by a coordinate mapping algorithm, and then display the color in the color gamut range of the target color gamut, without needing to associate the gamma curve or the brightness factor for color calibration, thereby enhancing the matching degree of the calibrated color gamut and the standard color gamut, improving the accuracy of color restoration of the liquid crystal display device, and optimizing the color experience of the user using the liquid crystal display device.

[0011] Preferably, the processing method for improving the color accuracy of the liquid crystal display device comprises the following steps in S1:

[0012] S11, test the second coordinate group of the original color gamut of the liquid crystal display device;

[0013] S12, select a standard color gamut matched with the liquid crystal display device, and obtain the first coordinate group of the standard color gamut;

[0014] S13, draw an original color gamut area triangle and a standard color gamut area triangle in the same coordinate system according to the second coordinate group and the first coordinate group, wherein the original color gamut area triangle corresponds to the original color gamut, and the standard color gamut area triangle corresponds to the standard color gamut.

[0015] As a preferred scheme of the present application, the processing method for improving the color accuracy of the liquid crystal display device can obtain the second coordinate group of the original color gamut and the first coordinate group of the standard color gamut, draw the color gamut area triangle by the second coordinate group and the first coordinate group, more accurately exclude the influence of other color factors, and intuitively and conveniently represent the original color gamut and the standard color gamut, thereby further enhancing the accuracy and reliability of color gamut calibration.

[0016] Preferably, the method for improving color accuracy of a liquid crystal display device according to the present application comprises the following steps:

[0017] The red coordinate, the green coordinate and the blue coordinate of the second coordinate group are input into an electronic spreadsheet, a scatter diagram chart is drawn by using the graphical function of the electronic spreadsheet, a graph of the original color gamut area triangle is formed, and the red coordinate, the green coordinate and the blue coordinate are respectively mapped to the point coordinates of the three corners of the original color gamut area triangle.

[0018] As a preferred scheme of the present application, each color coordinate of the second coordinate group is drawn by using the scatter diagram drawing function of the electronic spreadsheet, the original color gamut area triangle of the original color gamut can be accurately and quickly drawn, the color gamut range of the original color gamut is accurately indicated, the drawing method is simple and reliable, and the color calibration accuracy of the final liquid crystal display device is further improved.

[0019] Preferably, the method for improving color accuracy of a liquid crystal display device according to the present application comprises the following steps:

[0020] The red coordinate, the green coordinate and the blue coordinate of the first coordinate group are input into the same electronic spreadsheet in which the original color gamut area triangle is drawn, the X-axis series value and the Y-axis series value data of the standard color gamut are added to the scatter diagram chart, and the standard color gamut area triangle is drawn in the same electronic spreadsheet by using the graphical function of the electronic spreadsheet.

[0021] As a preferred scheme of the present application, the original color gamut area triangle and the standard color gamut area triangle are drawn in the same electronic spreadsheet by using the scatter diagram drawing function of the electronic spreadsheet, the original color gamut area triangle and the standard color gamut area triangle can be simultaneously indicated in the form of a graph, the color gamut range of the standard color gamut can be accurately indicated, the drawing method is simple and reliable, and the color calibration accuracy of the final liquid crystal display device is further improved.

[0022] Preferably, the method for improving color accuracy of a liquid crystal display device according to the present application comprises the following steps:

[0023] S21, a center point is drawn by taking the white point coordinate of the standard white point as the center point, and the R connecting line, the G connecting line and the B connecting line of the center point and the three corners of the standard color gamut area triangle are drawn;

[0024] S22, the intersection point coordinate R, the intersection point coordinate G and the intersection point coordinate B of the R connecting line, the G connecting line and the B connecting line and the original color gamut area triangle are obtained;

[0025] S23, drawing a target gamut area triangle according to the intersection point coordinate R, the intersection point coordinate G and the intersection point coordinate B, the target gamut area triangle representing a gamut range of the target gamut.

[0026] As a preferred scheme of the present application, the processing method for improving color accuracy of the liquid crystal display device, by taking the standard white point as the center point, establishes the R connecting line, the G connecting line and the B connecting line, and obtains the intersection point coordinate R, the intersection point coordinate G and the intersection point coordinate B in a graphical drawing manner, and draws a target gamut area triangle according to the intersection point coordinate R, the intersection point coordinate G and the intersection point coordinate B, so that the deviation of the gamut range of the original gamut and the standard gamut can be intuitively and conveniently displayed under the reference of the white point coordinate, the original gamut and the standard gamut of the liquid crystal display device are matched and calculated, and a new target gamut is generated, that is, a graphical target gamut area triangle, so that the accuracy of color calibration of the final liquid crystal display device is further improved.

[0027] Preferably, the processing method for improving color accuracy of the liquid crystal display device, the S21 specifically comprises the following steps:

[0028] In the same electronic table in which the original gamut area triangle and the standard gamut area triangle are drawn, a new list is created, and the white point coordinate and the red coordinate, the green coordinate and the blue coordinate of the first coordinate group are inputted;

[0029] The white point coordinate is added in the scatter plot chart, and the X-axis series value and the Y-axis series value data of the red coordinate, the green coordinate and the blue coordinate of the first coordinate group are added respectively, and the R connecting line, the G connecting line and the B connecting line are drawn through the graphical function of the electronic table.

[0030] As a preferred scheme of the present application, the R connecting line, the G connecting line and the B connecting line drawn by the above method can clearly and accurately establish the gamut deviation relationship between the original gamut area triangle and the standard gamut area triangle through the graph, and further conveniently and accurately represent the gamut range deviation between the original gamut and the standard gamut, so that the error of color calibration of the final liquid crystal display device is reduced.

[0031] Preferably, the processing method for improving color accuracy of the liquid crystal display device, the S22 specifically comprises the following steps:

[0032] If the intersection points of two lines in the R connecting line, the G connecting line and the B connecting line and two sides of the original gamut area triangle are located outside the original gamut area triangle, then the intersection point coordinate R, the intersection point coordinate G or the intersection point coordinate B is obtained according to the calculation formula group one;

[0033] The calculation formula group one is as follows:

[0034] ;

[0035] ;

[0036] Where x is the x-coordinate of the intersection point R, G, or B; y is the y-coordinate of the intersection point R, G, or B; x1 and x2 are the x-coordinates of the line connecting R, G, or B; y1 and y2 are the y-coordinates of the line connecting R, G, or B; x3 and x4 are the x-coordinates of one side of the original color gamut area triangle; and y3 and y4 are the y-coordinates of one side of the original color gamut area triangle.

[0037] If the endpoint of one of the lines R, G, and B is located within the original color gamut area triangle, then the endpoint is the intersection point coordinates R, G, or B corresponding to that line.

[0038] As a preferred embodiment of the present invention, the intersection coordinates R, G, and B can be calculated more accurately, thereby accurately representing the range of the target color gamut. Furthermore, the drawing method is simple and reliable to operate, further improving the accuracy of color calibration of the final liquid crystal display device.

[0039] Preferably, in the processing method for improving the color accuracy of a liquid crystal display device according to the present invention, step S3 specifically includes the following steps:

[0040] Connect the supergauge points located between the target gauge area triangle and the original gauge area triangle, with the white point coordinates of the standard white point as the center, to form a mapping line between the standard white point and the supergauge points; the mapping line intersects with the side of the target gauge area triangle, thus obtaining the mapping point of the supergauge points;

[0041] According to formula group three, calculate the calibration parameter S of the mapping point and the coordinates of the mapping point; formula group three is:

[0042] ;

[0043] ;

[0044] ;

[0045] Among them, RO x RO represents the x-coordinate of the line connecting R, G, or B. y P represents the ordinate value of the line connecting R, G, or B; x P represents the x-coordinate of the point in the supergamut. y O is the ordinate value of the supergamut point; x O is the x-coordinate value of the standard white point. y The ordinate value of the standard white point; GR xGR is the x-coordinate of the side where the target color gamut area triangle intersects with the mapping line. y Q is the ordinate of the side where the target color gamut area triangle intersects with the mapping line; x Q is the x-coordinate of the mapping point. y This represents the ordinate value of the mapping point.

[0046] As a preferred embodiment of the present invention, by mapping the super-gamut points to the range of the target color gamut area triangle based on the color gamut range deviation between the target color gamut area triangle and the original color gamut area triangle, the mapping points of the super-gamut points can be obtained. Then, by using the above calculation formula group three, the calibration parameter S is calculated. By using the calibration parameter S, the super-gamut points of the liquid crystal display device can be calibrated within the target color gamut range. By combining graphic drawing with graphic coordinate calculation, the original color gamut can be calibrated more accurately and conveniently, thereby improving the accuracy and efficiency of color calibration of the liquid crystal display device.

[0047] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0048] By plotting the coordinates of the color gamut as a triangle, and then drawing a target color gamut area triangle based on the area difference between the two triangles, the original color gamut of the LCD device is matched and calculated with the standard color gamut to generate a new target color gamut. Through a coordinate mapping algorithm, points outside the original color gamut that exceed the gamut range are matched and mapped to the target color gamut area triangle, thereby displaying colors within the target color gamut range. This eliminates the need for color calibration based on gamma curves or luminance factors, enhancing the matching degree between the calibrated color gamut and the standard color gamut, thereby improving the accuracy of color reproduction in the LCD device and optimizing the user's color experience. Attached Figure Description

[0049] Figure 1 This is a flowchart illustrating the processing method for improving the color accuracy of a liquid crystal display device according to the present invention;

[0050] Figure 2 This is a schematic diagram of the original color gamut area triangle and the standard color gamut area triangle of the present invention;

[0051] Figure 3 This is a schematic diagram of the target color gamut area triangle of the present invention;

[0052] Figure 4 This is a schematic diagram of the super gamut point matching mapping of the present invention to the target gamut area triangle. Detailed Implementation

[0053] The present invention will now be described in detail with reference to the accompanying drawings.

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0055] Example 1:

[0056] This embodiment discloses a processing method for improving the color accuracy of a liquid crystal display device, including the following steps:

[0057] S1. Test the original color gamut of the LCD display device; select a standard color gamut that matches the LCD display device; draw the original color gamut area triangle and the standard color gamut area triangle in the same coordinate system respectively;

[0058] S2. Draw the target color gamut area triangle based on the area deviation between the original color gamut and the standard color gamut area triangle;

[0059] S3. Through a coordinate mapping algorithm, the super-gamut points in the original color gamut that exceed the color gamut range are matched and mapped to the target color gamut area triangle, thereby realizing the display of colors within the color gamut range of the target color gamut.

[0060] The original color gamut of the liquid crystal display device described in this invention can be obtained through conventional testing methods, such as inputting red, green, and blue field signals into the liquid crystal display device and receiving signal feedback from the liquid crystal display device. Specifically, step S1 may include the following steps:

[0061] S11, the second coordinate group for testing the original color gamut of the liquid crystal display device;

[0062] S12. Select a standard color gamut that matches the LCD display device and obtain the first coordinate group of the standard color gamut;

[0063] S13. Based on the second coordinate group and the first coordinate group, draw the original color gamut area triangle and the standard color gamut area triangle in the same coordinate system respectively; the original color gamut area triangle corresponds to the original color gamut, and the standard color gamut area triangle corresponds to the standard color gamut.

[0064] The present invention describes drawing the original color gamut area triangle based on the second coordinate set. This can be achieved by marking the points of the red, green, and blue coordinates of the second coordinate set in a rectangular coordinate system, and connecting the points of the red, green, and blue coordinates to form the original color gamut area triangle. More specifically, drawing the original color gamut area triangle based on the second coordinate set includes the following steps: inputting the red, green, and blue coordinates of the second coordinate set into a spreadsheet, drawing a scatter plot using the spreadsheet's graphical function to form the graph of the original color gamut area triangle, and then assigning the red, green, and blue coordinates to the coordinates of the three corners of the original color gamut area triangle.

[0065] For example, when red, green, and blue field signals are input to the television set, the corresponding second coordinate group, R2G2B2 coordinates, is tested on the screen:

[0066] R2u': 0.4915 R2v': 0.5400;

[0067] G2u': 0.1100 G2v': 0.5832;

[0068] B2u': 0.1700 B2v': 0.1200;

[0069] Then, the original color gamut area triangle △M is drawn, for reference. Figure 2 As shown, the original color gamut area triangle △M is represented by the red lines, and the coordinates of the three angles R2, G2, and B2 of △M are the coordinates of the second coordinate set.

[0070] This invention constructs a standard color gamut area triangle based on a first coordinate group. This is achieved by marking the points of the red, green, and blue coordinates of the first coordinate group in a rectangular coordinate system, and connecting these points to form the standard color gamut area triangle. Specifically, the invention includes the following steps: in the same spreadsheet used to construct the original color gamut area triangle, inputting the red, green, and blue coordinates of the first coordinate group; adding X-axis and Y-axis values ​​of the standard color gamut to the scatter plot; and constructing the standard color gamut area triangle in the same spreadsheet using the spreadsheet's graphical function.

[0071] For example, this invention selects standard DCI-P3 as the standard color gamut, and the corresponding first coordinate group, R1G1B1 coordinates, are:

[0072] R1u': 0.4964 R1v': 0.5255;

[0073] G1u': 0.0986 G1v': 0.5777;

[0074] B1u': 0.1754 B1v': 0.1579;

[0075] refer to Figure 2 As shown, the standard color gamut area triangle △T is drawn, and the original color gamut area triangle △M is represented by the blue lines. The coordinates of the three angles R1, G1, and B1 of △T are the coordinates of the first coordinate group.

[0076] It should be noted that the area deviation between the original color gamut and the standard color gamut area triangles mentioned in this invention is understood as the color gamut deviation where the original color gamut area triangle does not fall within the area of ​​the standard color gamut area triangle. This deviation can be obtained through the overlapping data of the original color gamut area triangle and the standard color gamut area triangle, or it can be calculated through the vector coordinates of the three sides of the target color gamut area triangle and the original color gamut area triangle. Specifically, S2 of this invention may include the following steps:

[0077] S21. Using the coordinates of the standard white point as the center point, draw the R, G, and B lines connecting the center point to the three corners of the standard color gamut area triangle, respectively.

[0078] S22. Obtain the coordinates of the intersection points R, G, and B of the line connecting R, G, and B with the original color gamut area triangle, respectively.

[0079] S23. Based on the intersection point coordinates R, G, and B, draw the target color gamut area triangle, which represents the color gamut range of the target color gamut.

[0080] For example, using the coordinates of the D65 standard white point:

[0081] Wu': 0.1978, Wv': 0.4683;

[0082] The spectral distribution of the D65 light source is standardized by the International Commission on Illumination (CIE) and has been determined as a standard white light to provide a unified reference for color measurement and comparison. In this invention, the standard white point is used as the center, with reference to... Figure 3 As shown, the standard white dot is point O;

[0083] In this invention, the R-line, G-line, and B-line can be drawn by connecting the three corners of the standard white point and the color gamut area triangle. Specifically, step S21 includes the following steps:

[0084] In the same spreadsheet used to draw the original color gamut area triangle and the standard color gamut area triangle, create a new list and enter the white point coordinates and the red, green, and blue coordinates of the first coordinate group; add the white point coordinates to the scatter plot chart, and add the X-axis and Y-axis series values ​​of the red, green, and blue coordinates of the first coordinate group respectively; use the spreadsheet's graphical function to draw the R-line, G-line, and B-line.

[0085] By marking the intersection points of the lines connecting R, G, and B with the original color gamut area triangle in the coordinate system, the coordinates of the intersection points R, G, and B can be obtained. Specifically, this invention can be achieved through the following steps in S22:

[0086] If the intersection points of two of the lines R, G, and B with the two sides of the original color gamut area triangle are located outside the original color gamut area triangle, then according to the calculation formula group one, the intersection point coordinates R, G, or B can be calculated.

[0087] Formula group one:

[0088] ;

[0089] ;

[0090] Where x is the x-coordinate of the intersection point R; y is the y-coordinate of the intersection point R; x1 and x2 are the x-coordinates of the line connecting R, and y1 and y2 are the y-coordinates of the line connecting R; x3 and x4 are the x-coordinates of the R2B2 side of the original color gamut area triangle, and y3 and y4 are the y-coordinates of the R2B2 side of the original color gamut area triangle.

[0091] For example, refer to Figure 3 As shown, the coordinates of the line segment connecting R are (0.1978, 0.4683) and (0.4964, 0.5255). The line connecting R intersects the R2B2 side of the original color gamut area triangle at point R, and the coordinates of the R2B2 side are (0.1700, 0.1200) and (0.4915, 0.5400). According to the calculation formula group 1 above, the coordinates of the intersection point R are calculated as: Ru': 0.4777, Rv': 0.5220.

[0092] Similarly, based on the first set of calculation formulas, the coordinates R of the intersection point can be obtained. Then, based on the second set of calculation formulas, the coordinates B of the intersection point can be obtained. Calculation formula two:

[0093] ;

[0094] ;

[0095] Where, x GThe x-coordinate of the intersection point G; y G x5 and x6 are the ordinates of the intersection point G; x5 and x6 are the abscissas of the line connecting G, and y5 and y6 are the ordinates of the line connecting G; x7 and x8 are the abscissas of the G2B2 side of the original color gamut area triangle, and y7 and y8 are the ordinates of the G2B2 side of the original color gamut area triangle; for details, refer to... Figure 3 As shown, the coordinates of the line segment connecting G are (0.1978, 0.4683) and (0.0986, 0.5777). The line connecting R intersects the G2B2 side of the original color gamut area triangle at point G. The coordinates of the G2B2 side are (0.1700, 0.1200) and (0.1100, 0.5832). The coordinates of the intersection point G are Gu': 0.1127 and Gv': 0.5621.

[0096] In this invention, if the endpoint of one of the lines R, G, and B is located within the original color gamut area triangle, then the endpoint is the intersection coordinate R, intersection coordinate G, or intersection coordinate B corresponding to that line. It should be noted that the original color gamut area triangle may contain points that fall within or outside the standard color gamut area triangle. For example, if one endpoint of the R or G line falls outside the standard color gamut area triangle, then the endpoint of the B line falls within the standard color gamut area triangle. The intersection coordinate B can be obtained through the following steps: If the endpoint of the B line is located within the original color gamut area triangle, then the endpoint of the B line is the intersection coordinate B, that is, the blue coordinate of the first coordinate group is the intersection coordinate B, thus obtaining the intersection coordinate B.

[0097] For example, in this test case, the coordinates of endpoint B1 of line B are B1u': 0.1754, B1v': 0.1579. Endpoint B1 is completely contained within the color gamut area of ​​the original color gamut triangle. Therefore, the color coordinates of the intersection point B are Bu': 0.1754, Bv': 0.1579.

[0098] Through the above steps, the coordinates of intersection point R, intersection point G, and intersection point B are obtained as follows:

[0099] Ru': 0.4777 Rv': 0.5220;

[0100] Gu': 0.1127 Gv': 0.5621;

[0101] Bu': 0.1754 Bv': 0.1579.

[0102] The target color gamut area triangle can be drawn by referring to the standard color gamut area triangle drawing method. In this invention, specifically, refer to... Figure 3As shown, you can create a new column in the same table to enter the corresponding color coordinates of the intersection point R, G, and B; right-click in the chart, go to the Select Data tab, add a series, select the corresponding X-axis series values ​​and Y-axis series values ​​respectively, and draw the target color gamut area triangle △A in the same chart;

[0103] The coordinate mapping algorithm described in this invention is understood as follows: mapping the points of the original color gamut area triangle located outside the target color gamut area triangle to the target color gamut area triangle through a coordinate transformation algorithm; specifically, S3 of this invention includes the following steps:

[0104] Connect the supergauge points located between the target gauge area triangle and the original gauge area triangle, with the white point coordinates of the standard white point as the center, to form a mapping line between the standard white point and the supergauge points; the mapping line intersects with the side of the target gauge area triangle, thus obtaining the mapping point of the supergauge points;

[0105] For example, refer to Figure 4 As shown, the basic principle of mapping is that points located inside △A are not mapped, while points outside the △A color gamut are mapped. The coordinates of the D65 standard white point, Wu': 0.1978, Wv': 0.4683, are chosen as the center to connect the points outside the color gamut. The parts outside the color gamut are mapped to the sides of triangle △A. That is, the standard white point O and the point outside the color gamut P are connected, and the intersection point Q of the connecting line OP and the side GR of triangle △A is the mapping point.

[0106] Then, according to calculation formula group three, calculate the calibration parameter S of the mapping point and the coordinates of the mapping point; the calculation formula group three is:

[0107] ;

[0108] ;

[0109] ;

[0110] Among them, RO x RO represents the x-coordinate of the line connecting R, G, or B. y P represents the ordinate value of the line connecting R, G, or B; x P represents the x-coordinate of the point in the supergamut. y O is the ordinate value of the supergamut point; x O is the x-coordinate value of the standard white point. y The ordinate value of the standard white point; GR x GR is the x-coordinate of the side where the target color gamut area triangle intersects with the mapping line. y Q is the ordinate of the side where the target color gamut area triangle intersects with the mapping line; xQ is the x-coordinate of the mapping point. y This represents the ordinate value of the mapping point.

[0111] For example, refer to Figure 4 As shown, the coordinates of the intersection point R, the intersection point G, and the standard white point O are as follows:

[0112] R=(0.4777,0.5220);

[0113] G=(0.1127,0.5621);

[0114] O = (0.1978, 0.4683);

[0115] ;

[0116] ;

[0117] ;

[0118] Verification is performed by substituting the coordinates of the supergamut point P. For example, if the supergamut point P takes the coordinates of the mapped point Q, then P... x =0.4777, P y =0.5220, and S=0 is calculated. It can be seen that point P can be calibrated to coincide with the mapping point Q through the calibration parameter S.

[0119] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A processing method for improving the color accuracy of a liquid crystal display device, characterized in that, Including the following steps: S1. Test the original color gamut of the LCD display device; select a standard color gamut that matches the LCD display device; draw the original color gamut area triangle and the standard color gamut area triangle in the same coordinate system respectively; S2. Draw the target color gamut area triangle based on the area deviation between the original color gamut and the standard color gamut area triangle; S3. Through a coordinate mapping algorithm, the super-gamut points in the original color gamut that exceed the color gamut range are matched and mapped to the target color gamut area triangle, thereby realizing the display of colors within the color gamut range of the target color gamut.

2. The processing method for improving the color accuracy of a liquid crystal display device according to claim 1, characterized in that, S1 specifically includes the following steps: S11, the second coordinate group for testing the original color gamut of the liquid crystal display device; S12. Select a standard color gamut that matches the LCD display device and obtain the first coordinate group of the standard color gamut; S13. Based on the second coordinate group and the first coordinate group, draw the original color gamut area triangle and the standard color gamut area triangle in the same coordinate system respectively; the original color gamut area triangle corresponds to the original color gamut, and the standard color gamut area triangle corresponds to the standard color gamut.

3. The processing method for improving the color accuracy of a liquid crystal display device according to claim 2, characterized in that, The original color gamut area triangle is drawn based on the second coordinate set, specifically including the following steps: Input the red, green, and blue coordinates of the second coordinate group into a spreadsheet. Use the spreadsheet's graphical function to draw a scatter plot, forming a triangle representing the original color gamut area. Then, assign the red, green, and blue coordinates to the coordinates of the three corners of the triangle representing the original color gamut area.

4. The processing method for improving the color accuracy of a liquid crystal display device according to claim 3, characterized in that, The standard color gamut area triangle is drawn based on the first coordinate group, specifically including the following steps: In the same spreadsheet used to draw the original color gamut area triangle, input the red, green, and blue coordinates of the first coordinate group; add the X-axis and Y-axis series values ​​of the standard color gamut to the scatter plot chart, and draw the standard color gamut area triangle in the same spreadsheet using the spreadsheet's graphical function.

5. The processing method for improving the color accuracy of a liquid crystal display device according to claim 1, characterized in that, S2 specifically includes the following steps: S21. Using the coordinates of the standard white point as the center point, draw the R, G, and B lines connecting the center point to the three corners of the standard color gamut area triangle, respectively. S22. Obtain the coordinates of the intersection points R, G, and B of the line connecting R, G, and B with the original color gamut area triangle, respectively. S23. Based on the intersection point coordinates R, G, and B, draw the target color gamut area triangle, which represents the color gamut range of the target color gamut.

6. The processing method for improving the color accuracy of a liquid crystal display device according to claim 5, characterized in that, S21 specifically includes the following steps: In the same spreadsheet used to draw the original color gamut area triangle and the standard color gamut area triangle, create a new list and enter the coordinates of the white point and the red, green and blue coordinates of the first coordinate group; Add the coordinates of the white points to the scatter plot, and add the X-axis and Y-axis values ​​of the red, green, and blue coordinates of the first coordinate group respectively. Use the spreadsheet's graphical function to draw the R-line, G-line, and B-line.

7. The processing method for improving the color accuracy of a liquid crystal display device according to claim 5, characterized in that, S22 specifically includes the following steps: If the intersection points of two of the lines R, G, and B with the two sides of the original color gamut area triangle are located outside the original color gamut area triangle, then according to the calculation formula group one, the intersection point coordinates R, G, or B can be calculated. Formula group one: ； ； Where x is the x-coordinate of the intersection point R, G, or B; y is the y-coordinate of the intersection point R, G, or B; x1 and x2 are the x-coordinates of the line connecting R, G, or B; y1 and y2 are the y-coordinates of the line connecting R, G, or B; x3 and x4 are the x-coordinates of one side of the original color gamut area triangle; and y3 and y4 are the y-coordinates of one side of the original color gamut area triangle. If the endpoint of one of the lines R, G, and B is located within the original color gamut area triangle, then the endpoint is the intersection point coordinates R, G, or B corresponding to that line.

8. The processing method for improving the color accuracy of a liquid crystal display device according to any one of claims 1-7, characterized in that, S3 specifically includes the following steps: Connect the supergauge points located between the target gauge area triangle and the original gauge area triangle, with the white point coordinates of the standard white point as the center, to form a mapping line between the standard white point and the supergauge points; the mapping line intersects with the side of the target gauge area triangle, thus obtaining the mapping point of the supergauge points; According to formula group three, calculate the calibration parameter S of the mapping point and the coordinates of the mapping point; formula group three is: ； ； ； Among them, RO x RO represents the x-coordinate of the line connecting R, G, or B. y P represents the ordinate value of the line connecting R, G, or B; x P represents the x-coordinate of the point in the supergamut. y O is the ordinate value of the supergamut point; x O is the x-coordinate value of the standard white point. y The ordinate value of the standard white point; GR x GR is the x-coordinate of the side where the target color gamut area triangle intersects with the mapping line. y Q is the ordinate of the side where the target color gamut area triangle intersects with the mapping line; x Q is the x-coordinate of the mapping point. y This represents the ordinate value of the mapping point.

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