A color difference compensation method and display device

Abstract

This invention discloses a color difference compensation method and display device, used to effectively compensate for white point coordinate drift caused by fluctuations in CF process, BLU light guide plate, and LED process, thereby achieving color consistency in shipped LCD displays and improving product specifications. The method is applied to a display device comprising light source components for different color blocks, including: determining the chromaticity coordinates of the light source components for different color blocks, wherein the chromaticity coordinates represent colors in a color mixing space; determining a color difference compensation factor based on the chromaticity coordinates of the light source components for different color blocks and the chromaticity coordinates of a preset white point, wherein the color difference compensation factor represents the color mixing ratio of the light source components for different color blocks; and, based on the color difference compensation factor, individually controlling and adjusting the current of the light source components for different color blocks to compensate for the color difference of the preset white point using the color obtained by mixing the adjusted light source components for different color blocks.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display technology, and in particular to a color difference compensation method and display device. Background Technology

[0002] Due to fluctuations in the CF (color filter) process, the BLU (Back Light Unit) internal light guide plate, and the LED (light emitting diode) process, current LCD monitors suffer from white point chromaticity coordinate (i.e., white point color) drift, resulting in unavoidable color differences between individual LCD monitors.

[0003] Although conventional LCD monitors come with a system color calibration function, the calibration range is limited. After calibration, the LCD monitor will experience a certain loss of brightness and a reduction in the number of colors, resulting in poor performance. Summary of the Invention

[0004] This invention provides a color difference compensation method and display device, which effectively compensates for the white point coordinate drift caused by CF process fluctuations, BLU light guide plate and LED process fluctuations, so as to achieve color consistency of LCD shipments and improve product specifications.

[0005] In a first aspect, an embodiment of the present invention provides a color difference compensation method applied to a display device, the display device including light source components for different color blocks, the method comprising:

[0006] Determine the chromaticity coordinates of the light source components for different color blocks, wherein the chromaticity coordinates represent colors in the color mixing space;

[0007] Based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of the preset white point, a color difference compensation factor is determined, wherein the color difference compensation factor represents the color mixing ratio of the light source components of different color blocks;

[0008] Based on the color difference compensation factor, the current of the light source components of different color blocks is individually controlled and adjusted so as to use the color obtained by mixing the light source components of the adjusted different color blocks to perform color difference compensation on the preset white point color.

[0009] This embodiment introduces light source components with different color blocks, individually controls and adjusts the current of the light source components with different color blocks, thereby controlling the mixing ratio of the colors of the light source components with different color blocks, so that the mixed color is close to the chromaticity coordinates of the white point, thereby realizing the control of the chromaticity coordinates of the white point and solving the problem that the chromaticity coordinates of the white point of current liquid crystal displays cannot be adjusted.

[0010] As an optional implementation, determining the color difference compensation factor based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of a preset white point includes:

[0011] According to the CIE chromaticity system's additive color theory, the chromaticity coordinates of the light source components of different color blocks are added together to obtain the chromaticity coordinate range;

[0012] Based on the chromaticity coordinates of a preset white point, select the target chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point from the range of chromaticity coordinates;

[0013] The color difference compensation factor is determined based on the target chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks.

[0014] As an optional implementation, the light source assembly includes two color blocks;

[0015] The chromaticity coordinates of the light source components of the different color blocks include the first chromaticity coordinates of the light source components of the first type of color block and the second chromaticity coordinates of the light source components of the second type of color block.

[0016] The chromaticity coordinate range includes the coordinates on the line segment formed by the first chromaticity coordinate and the second chromaticity coordinate.

[0017] As an optional implementation, target chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point are selected from the range of chromaticity coordinates in the following manner:

[0018] If the foot of the perpendicular from the chromaticity coordinates of the preset white point to the line segment falls on the line segment, then the target chromaticity coordinates are determined based on the coordinates of the foot of the perpendicular; or,

[0019] If the perpendicular point from the chromaticity coordinates of the preset white point to the line segment does not fall on the line segment, then the target chromaticity coordinates are determined based on the chromaticity coordinates that are closest to the perpendicular point coordinates between the first and second chromaticity coordinates.

[0020] As an optional implementation method, the color difference compensation factor is determined in the following way:

[0021] The first factor is determined based on the first chromaticity coordinates, the second chromaticity coordinates, and the target chromaticity coordinates;

[0022] Based on the first factor and the brightness of the light source components of different color blocks, the color difference compensation factor is determined;

[0023] The brightness of the light source components for the different color blocks is determined based on the brightness characteristics contained in the chromaticity coordinates of the light source components for the different color blocks.

[0024] As an optional implementation method, the color difference compensation factor is determined by the following formula:

[0025] I B / I A = k×(Y2 / Y1);

[0026] Among them, I B / I A I represents the color difference compensation factor. A I represents the current of the light source component at the first chromaticity coordinate. B Y1 represents the current of the light source component at the second chromaticity coordinate; Y2 represents the brightness of the light source component at the first chromaticity coordinate; and Y1 represents the brightness of the light source component at the second chromaticity coordinate.

[0027] As an optional implementation method,

[0028] When the color difference compensation factor is equal to zero, the current of the light source component of the second color block is controlled to be zero, and the current of the light source component of the first color block is the preset total current; or,

[0029] When the color difference compensation factor is equal to infinity, the current of the light source component of the first color block is controlled to be zero, and the current of the light source component of the second color block is the preset total current.

[0030] As an optional implementation, determining the chromaticity coordinates of the light source components for different color patches includes:

[0031] For any given color block, the current of the light source components for other color blocks is controlled to zero.

[0032] The chromaticity coordinates of the light source component of any color block are determined based on the current of the light source component of any color block, wherein the current of the light source component of any color block is determined based on a preset total current and the number of different types of color blocks.

[0033] As an optional implementation, the light source assembly includes three color blocks;

[0034] The chromaticity coordinates of the light source components for the different color blocks include the third chromaticity coordinates of the light source component for the third color block, the fourth chromaticity coordinates of the light source component for the fourth color block, and the fifth chromaticity coordinates of the light source component for the fifth color block.

[0035] The chromaticity coordinate range includes the coordinates within the triangle formed by the third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate.

[0036] As an optional implementation, determining the chromaticity coordinates of the light source components for different color patches includes:

[0037] Using the chromaticity coordinates of a preset white point as the center, a triangular region containing the center is determined by the color block expansion method;

[0038] The third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate are determined based on the coordinates of the three vertices of the triangular region.

[0039] As an optional implementation, target chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point are selected from the range of chromaticity coordinates in the following manner:

[0040] When the chromaticity coordinates of the preset white point are located within the triangle, the target chromaticity coordinates are the chromaticity coordinates of the preset white point.

[0041] As an optional implementation, determining the color difference compensation factor based on the target chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks includes:

[0042] Determine the coordinates of the intersection point of the line connecting the third chromaticity coordinates and the chromaticity coordinates of the preset white point with the line connecting the fourth chromaticity coordinates and the fifth chromaticity coordinates;

[0043] The second factor is determined based on the third chromaticity coordinates, the chromaticity coordinates of the preset white point, and the coordinates of the intersection point;

[0044] The third factor is determined based on the fourth chromaticity coordinates, the fifth chromaticity coordinates, and the intersection point coordinates;

[0045] The color difference compensation factor is determined based on the second factor, the third factor, and the brightness of the light source components for different color blocks.

[0046] As an optional implementation, the color difference compensation factor includes a first color difference compensation factor and a second color difference compensation factor, which are determined by the following formula:

[0047] I D / I E =m×(Y6 / Y3), I G / I F = n×(Y5 / Y4);

[0048] Where m represents the second factor, n represents the third factor, and I D / I E I represents the second color difference compensation factor. G / I FY represents the first color difference compensation factor, Y6 represents the brightness of the light source component at the intersection coordinates, Y3 represents the brightness of the light source component at the third chromaticity coordinates, Y4 represents the brightness of the light source component at the fourth chromaticity coordinates, and Y5 represents the brightness of the light source component at the fifth chromaticity coordinates.

[0049] As an optional implementation, the step of individually controlling and adjusting the current of the light source components for different color blocks according to the color difference compensation factor includes:

[0050] Based on the color difference compensation factor, the brightness of the light source components of different color blocks, and the preset total current value, the current value of the light source components of different color blocks is determined.

[0051] Based on the current value of the light source components for different color blocks, the current of the light source components for different color blocks is individually controlled and adjusted.

[0052] As an optional implementation, when the color difference compensation factor exceeds a preset critical range, the method further includes:

[0053] Based on the preset critical range and the chromaticity coordinates of the light source components of different color blocks, the restricted chromaticity coordinates are determined;

[0054] Based on the restricted chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks, a new color difference compensation factor is determined;

[0055] Based on the new color difference compensation factor, the current of the light source components for different color blocks is individually controlled and adjusted so that the adjusted current is within a preset adjustment range.

[0056] As an optional implementation, determining the restricted chromaticity coordinates based on the preset critical range and the chromaticity coordinates of the light source components of different color blocks includes:

[0057] If the color difference compensation factor exceeds the preset critical range, then the critical value is determined based on the maximum or minimum value of the preset critical range.

[0058] Based on the critical value and the chromaticity coordinates of the light source components for different color blocks, the restricted chromaticity coordinates are determined.

[0059] Secondly, an embodiment of the present invention provides a display device comprising light source components for different color blocks and a processor, wherein:

[0060] The light source components for the different color blocks are used to provide light sources of different colors;

[0061] The processor is configured to perform the following steps:

[0062] Determine the chromaticity coordinates of the light source components for different color blocks, wherein the chromaticity coordinates represent colors in the color mixing space;

[0063] Based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of the preset white point, a color difference compensation factor is determined, wherein the color difference compensation factor represents the color mixing ratio of the light source components of different color blocks;

[0064] Based on the color difference compensation factor, the current of the light source components of different color blocks is individually controlled and adjusted so as to use the color obtained by mixing the light source components of the adjusted different color blocks to perform color difference compensation on the preset white point color.

[0065] As an optional implementation, it also includes any one or more of the following:

[0066] The light source components of the different color blocks are distributed in a cross pattern;

[0067] The light source components are distributed according to a preset rule and are tilted relative to the horizontal plane;

[0068] The light source assembly includes at least two layers, with the light source assemblies in each layer distributed according to a preset rule, and the spacing between the light source assemblies in one layer and the light source assemblies in the other layer being opposite.

[0069] As an optional implementation method,

[0070] When the light source assembly comprises one layer, the light source assemblies for different color blocks are distributed in a staggered manner, and the light source assembly for each color block is tilted relative to the horizontal plane; or,

[0071] When the light source assembly comprises two layers and includes two types of color blocks, the color blocks in the same layer are identical, and the color blocks in different layers are different, wherein the spacing between adjacent color blocks in one layer is opposite to that of the color blocks in the other layer; or,

[0072] When the light source assembly includes two layers and the light source assembly includes three color blocks, each layer includes three color blocks, and the three color blocks are distributed in an alternating manner, wherein the spacing between adjacent color blocks in one layer is opposite to that of color blocks in another layer.

[0073] As an optional implementation, the light source assembly for the different color blocks further includes:

[0074] By adjusting the phosphor ratio of different color blocks, an extended light source component is obtained by expanding the color blocks outward.

[0075] Thirdly, embodiments of the present invention also provide a color difference compensation device, the device comprising:

[0076] The coordinate determination module is used to determine the chromaticity coordinates of the light source components of different color blocks, wherein the chromaticity coordinates represent the colors in the color mixing space;

[0077] The compensation module is used to determine the color difference compensation factor based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of the preset white point. The color difference compensation factor represents the color mixing ratio of the light source components of different color blocks.

[0078] The current adjustment module is used to individually control and adjust the current of the light source components of different color blocks according to the color difference compensation factor, so as to use the color obtained by mixing the light source components of the different color blocks after adjustment to perform color difference compensation on the preset white point color.

[0079] Fourthly, embodiments of the present invention also provide a computer storage medium having a computer program stored thereon, which, when executed by a processor, is used to implement the steps of the method described in the first aspect above.

[0080] These or other aspects of this application will become more apparent in the following description of embodiments. Attached Figure Description

[0081] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0082] Figure 1 A schematic diagram of a CIE color addition theory provided for an embodiment of the present invention;

[0083] Figure 2 This is a schematic diagram illustrating the principle of color difference compensation provided in an embodiment of the present invention;

[0084] Figure 3 A flowchart illustrating the implementation of a color difference compensation method according to an embodiment of the present invention;

[0085] Figures 4A-4B A schematic diagram illustrating the determination of chromaticity coordinates using a three-color block light source assembly, as provided in an embodiment of the present invention;

[0086] Figures 5A to 5F A schematic diagram illustrating the calculation of the chromaticity coordinates of a light source component for a dual-color block, provided as an embodiment of the present invention;

[0087] Figure 6 A schematic diagram of the chromaticity coordinates of a three-color block light source assembly provided in an embodiment of the present invention;

[0088] Figure 7A This is a schematic diagram of the LED color block distribution in a currently mass-produced conventional product, provided as an embodiment of the present invention.

[0089] Figure 7BThis is a schematic diagram of the outward distribution of color blocks provided in an embodiment of the present invention;

[0090] Figures 8A-8B This is a schematic diagram of an LED component with different color blocks provided in an embodiment of the present invention;

[0091] Figure 9 This is a schematic diagram comparing the A / P limits of conventional LED component manufacturing, provided as an embodiment of the present invention.

[0092] Figure 10 A schematic diagram of a display device provided in an embodiment of the present invention;

[0093] Figure 11 This is a schematic diagram of a color difference compensation device provided in an embodiment of the present invention. Detailed Implementation

[0094] 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. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0095] In this embodiment of the invention, the term "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0096] The application scenarios described in the embodiments of this invention are for the purpose of more clearly illustrating the technical solutions of the embodiments of this invention, and do not constitute a limitation on the technical solutions provided by the embodiments of this invention. Those skilled in the art will understand that with the emergence of new application scenarios, the technical solutions provided by the embodiments of this invention are also applicable to similar technical problems. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0097] Example 1: The CIE (International Commission on Illumination) has defined a standard colorimetric system, called the CIE standard colorimetric system. This is a color mixing system established based on color matching experiments, quantitatively expressing color using the number of the three primary colors that make up each color. The process of adjusting two colors to appear visually identical or equal is called color matching. In color matching, the three colors used for color mixing to produce any color are called the three primary colors. Typically, red, green, and blue light are used as the three primary colors in additive color mixing to obtain the maximum number of mixed colors.

[0098] In color matching experiments, the number of primary colors required to achieve a color match with the color to be matched is called the tristimulus value, denoted as R, G, and B. A color corresponds to a set of R, G, and B values; colors with the same R, G, and B values ​​will have the same color perception (appearance). Because a specific set of R, G, and B tristimulus values ​​represents a specific color perception under specific experimental and observational conditions, different R, G, and B tristimulus values ​​represent different color perceptions. Therefore, the set of all color perceptions constitutes a tristimulus value space, called the color mixing space. In this space, each color perception is represented by a coordinate point. Any color C can be represented in the tristimulus value space by a vector originating from the origin, with the R, G, and B tristimulus values ​​being the components of this vector on the three coordinate axes. The tristimulus values, i.e., coordinate points, of the CIE standard colorimetric system are represented by X, Y, and Z. Only the Y value represents chromaticity and luminance, called the luminance factor; X and Z only represent chromaticity and are independent of luminance. When using numbers to describe colors, the Yxy color representation method is often used. This method uses chromaticity coordinates (x, y) to represent the chromaticity characteristics of a color and a luminance factor Y to represent the luminance characteristics of a color. In this way, the appearance of a color can be completely and uniquely determined.

[0099] It should be noted that the chromaticity coordinates in this embodiment are coordinates in a color mixing space, including chromaticity features and brightness features. For example, the chromaticity coordinates in this embodiment are (x, y, Y), where (x, y) represents the chromaticity feature of the color and Y represents the brightness feature of the color.

[0100] The CIE additive color theory states that by adjusting the mixing ratio of any two colors, the addition of any two colors can produce any color along the line connecting them. When a third color is added, it will produce any color within a triangle formed by the three colors. For example... Figure 1 As shown in the figure, this embodiment provides a schematic diagram of the CIE color additive theory. By adjusting the ratio of chromaticity coordinates B and G, the color of any chromaticity coordinate on line segment BG can be generated, such as chromaticity coordinates A, C, F, etc. Similarly, by adjusting the ratio of chromaticity coordinates I, J, and K, the color of any chromaticity coordinate within triangle IJK (including the sides of the triangle) can be generated, such as generating chromaticity coordinate C.

[0101] Current LCD monitors suffer from fluctuations in CF (color filter) manufacturing processes, as well as in the manufacturing processes of the BLU (Back Light Unit) light guide plate and LEDs (light emitting diodes). This causes a drift in the white point chromaticity coordinates (i.e., white point color), resulting in unavoidable color differences between individual LCD monitors. Although conventional LCD monitors have a built-in color calibration function, the calibration range is limited. After calibration, the monitor's brightness is somewhat reduced, and the number of colors is also decreased, resulting in unsatisfactory performance.

[0102] Based on the above principle of color addition, that is, adding any two colors produces the color on the line connecting the two, and adding any three colors produces the color within the triangle formed by the three, by adjusting the current of the light source components of different color blocks, the effect of mixing and adding colors in any proportion can be achieved, realizing the control of the chromaticity coordinates of the white point, and solving the problem that the chromaticity coordinates of the white point of current LCD displays cannot be adjusted.

[0103] The core idea of ​​this application is to control the mixing ratio of the colors of different color blocks by introducing light source components of different color blocks and individually controlling and adjusting the current of these components, so that the mixed color approximates the chromaticity coordinates of the white point. Figure 2 As shown in the diagram, this embodiment provides a schematic diagram of the color difference compensation principle. By adjusting the mixing ratio of the colors of the light source components of different color blocks, the chromaticity coordinates of the white point are compensated. For example, when W is the preset chromaticity coordinate of the white point, and it is located on line segment AB and within triangle ABC, the adjustable range is any chromaticity coordinate point on line segment AB or any chromaticity coordinate point within triangle ABC. Therefore, when a white point drift problem occurs, color difference compensation can be performed on the chromaticity coordinates of the white point, achieving white point adjustability. This effectively compensates for white point coordinate drift caused by CF process fluctuations, BLU light guide plate fluctuations, and LED fluctuations, achieving color consistency in module shipments and improving product specifications.

[0104] like Figure 3 As shown, the implementation process of a color difference compensation method provided in this embodiment is as follows:

[0105] Step 300: Determine the chromaticity coordinates of the light source components for different color blocks, wherein the chromaticity coordinates represent the colors in the color mixing space;

[0106] Optionally, the light source component in this embodiment includes two or more color blocks, and the distribution of different color blocks is based on the light source that can better mix different color blocks. This embodiment does not impose too many restrictions on the specific distribution of different color blocks.

[0107] In some embodiments, the light source component in this embodiment includes two types of color blocks; the chromaticity coordinates of the light source components for the different color blocks include the first chromaticity coordinates of the light source component for the first type of color block and the second chromaticity coordinates of the light source component for the second type of color block; in this type of light source component, the chromaticity coordinates of the light source components for the different color blocks are determined in the following manner:

[0108] For any given color block, the current of the light source components for other color blocks is controlled to zero.

[0109] The chromaticity coordinates of the light source component for any given color patch are determined based on the current of that component, wherein the current of the light source component for any given color patch is determined based on a preset total current and the number of different color patches. In practice, the current of the light source component for any given color patch = preset total current / 2.

[0110] It should be noted that the current of the light source components of different color blocks in this embodiment is controlled independently, but the sum of the currents of the light source components of different color blocks (i.e., the total current) is fixed.

[0111] In implementation, assuming the light source component for the first color block is A and the light source component for the second color block is B, the current of A is i and the current of B is j. To determine the current of A, j = 0 and i = I / 2 can be controlled, and the first chromaticity coordinate of A can be obtained by measuring with an optical testing device (such as CA310). Similarly, to determine the current of B, i = 0 and j = I / 2 can be controlled, and the second chromaticity coordinate of B can be obtained by measuring with an optical testing device (such as CA310). Here, I represents the preset total current, which is the total current value predetermined in advance through the spec and design scheme during the product design stage.

[0112] In some embodiments, the light source component in this embodiment includes three color blocks; the chromaticity coordinates of the light source components for the different color blocks include the third chromaticity coordinates of the light source component for the third color block, the fourth chromaticity coordinates of the light source component for the fourth color block, and the fifth chromaticity coordinates of the light source component for the fifth color block; in this type of light source component, the chromaticity coordinates of the light source components for the different color blocks are determined in the following manner:

[0113] Using the chromaticity coordinates of a preset white point as the center, a triangular region containing the center is determined by the color block expansion method; based on the coordinates of the three vertices of the triangular region, the third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate are determined.

[0114] like Figures 4A-4B As shown in the diagram, this embodiment provides a schematic diagram of a three-color block light source component for determining chromaticity coordinates. Figure 4AIn the algorithm, the chromaticity coordinates W of the preset white point are (0.313, 0.329). Using W as the center, a ±30% area is calculated to obtain a circular area centered at W. The color blocks are then expanded beyond this central area. Suitable tri-color blocks are found among the color blocks outside this central area to maximize the placement of the center within the triangle formed by the tri-color blocks. Figure 4B In the process, three color blocks are found, and the inscribed circle of the triangle formed by the three color blocks is a circular area with W as the center, so that W is placed inside the triangle to the greatest extent, and the chromaticity coordinates of the white point can still be adjusted to the preset chromaticity coordinates of the white point even when W fluctuates by ±30%.

[0115] Step 301: Determine the color difference compensation factor based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of the preset white point. The color difference compensation factor represents the color mixing ratio of the light source components of different color blocks.

[0116] In some embodiments, the color difference compensation factor is determined by the following steps:

[0117] Step a) According to the CIE colorimetric system's additive color theory, add the chromaticity coordinates of the light source components of different color blocks to obtain the chromaticity coordinate range;

[0118] Optionally, when the light source component includes two color blocks, the chromaticity coordinates of the light source component for different color blocks include the first chromaticity coordinates of the light source component for the first color block and the second chromaticity coordinates of the light source component for the second color block. The range of chromaticity coordinates includes the coordinates on the line segment formed by the first chromaticity coordinates and the second chromaticity coordinates, that is, the color on the line connecting the two colors is produced by adding any two colors together.

[0119] Optionally, when the light source component includes three color blocks; the chromaticity coordinates of the light source components for different color blocks include the third chromaticity coordinates of the light source component for the third color block, the fourth chromaticity coordinates of the light source component for the fourth color block, and the fifth chromaticity coordinates of the light source component for the fifth color block, the chromaticity coordinate range includes the coordinates within the triangle formed by the third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate (including the sides of the triangle).

[0120] Step b) Based on the chromaticity coordinates of the preset white point, select the target chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point from the range of chromaticity coordinates;

[0121] Optionally, when the chromaticity coordinate range includes the coordinates on the line segment formed by the first chromaticity coordinate and the second chromaticity coordinate, the target chromaticity coordinates are determined by any one or more of the following methods:

[0122] Method i) If the perpendicular point from the chromaticity coordinates of the preset white point to the line segment falls on the line segment, then the target chromaticity coordinates are determined based on the coordinates of the perpendicular point;

[0123] like Figures 5A-5B As shown in the figure, this embodiment provides a schematic diagram for calculating the chromaticity coordinates of a light source component for a dual-color block. Assuming the first chromaticity coordinate is A(x1, y1, Y1), the second chromaticity coordinate is B(x2, y2, Y2), and the preset chromaticity coordinates W of the white point are (0.313, 0.329), the perpendicular point C(x0, y0, Y0) from W to line segment AB is calculated. Since the perpendicular point C falls on line segment AB, the perpendicular point C is taken as the target chromaticity coordinate.

[0124] Method ii) If the perpendicular point from the chromaticity coordinates of the preset white point to the line segment does not fall on the line segment, then the target chromaticity coordinates are determined based on the chromaticity coordinates that are closest to the perpendicular point coordinates between the first and second chromaticity coordinates.

[0125] like Figures 5C-5F As shown in the diagram, this embodiment provides a schematic diagram for calculating the chromaticity coordinates of a light source component for a dual-color block. Assuming the first chromaticity coordinate is A(x1, y1, Y1), the second chromaticity coordinate is B(x2, y2, Y2), and the preset chromaticity coordinates W of the white point are (0.313, 0.329), the perpendicular point C(x0, y0, Y0) from W to line segment AB is calculated. The perpendicular point C falls outside line segment AB. Figure 5C and Figure 5D In the equation, if the distance from the perpendicular point C to B is closer than the distance to A, then the second chromaticity coordinate B is taken as the target chromaticity coordinate. Figure 5E and Figure 5F In the equation, if the distance from the perpendicular point C to A is closer than the distance to B, then the first chromaticity coordinate A is taken as the target chromaticity coordinate.

[0126] Optionally, when the chromaticity coordinate range includes the coordinates within the triangle formed by the third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate, the target chromaticity coordinates are determined in the following manner:

[0127] When the chromaticity coordinates of the preset white point are located within the triangle, the target chromaticity coordinates are the chromaticity coordinates of the preset white point.

[0128] Step c) Determine the color difference compensation factor based on the target chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks.

[0129] In implementation, when the light source component includes two color blocks, and the target chromaticity coordinates are the perpendicular point coordinates or the chromaticity coordinates of the first and second chromaticity coordinates that are closest to the perpendicular point coordinates, the perpendicular point is calculated based on the collinearity formula and the perpendicularity formula, as shown below:

[0130]

[0131]

[0132] Formula (1) is the collinearity formula for the first chromaticity coordinate A (x1, y1, Y1), the second chromaticity coordinate B (x2, y2, Y2), and the perpendicular point C (x0, y0, Y0); where x1 and y1 represent the chromaticity of the first chromaticity coordinate A, and Y1 represents the luminance of the first chromaticity coordinate A. Similarly, x2 and y2 represent the chromaticity of the second chromaticity coordinate B, and Y2 represents the luminance of the second chromaticity coordinate B. x0 and y0 represent the chromaticity of the perpendicular point C, and Y0 represents the luminance of the perpendicular point C.

[0133] Formula (2) is the perpendicular formula for line segment AB and line segment WC.

[0134] The following can be calculated using the above formula:

[0135] x0=0.313-(y2-y1)*(y0-0.329) / (x2-x1);

[0136] y0=((x2-x1)*(y2-y1)*(0.313-x1)+0.329*(y2-y1)2+y1*(x2-x1)2) / ((x2-x1)2+(y2-y1)2);

[0137] The formula for the CIE 1931 tristimulus value theory of color additive color mixing is as follows:

[0138] X1+X2=X0 formula (3);

[0139] Where X1 represents the tristimulus value of the first chromaticity coordinate A, X2 represents the tristimulus value of the second chromaticity coordinate B, and X0 represents the tristimulus value of the perpendicular point C. Formula (4) is derived from formula (3):

[0140]

[0141] Where k represents the first factor, used to calculate the color difference compensation factor to be solved, and formula (5) is derived from formula (4):

[0142]

[0143] Where k represents the first factor.

[0144] Based on the above formula (5), the method for determining the first factor when the foot of the perpendicular C falls on or outside line segment AB is derived as follows:

[0145] When the foot of the perpendicular C falls on line segment AB, the first factor k is determined by the following formula:

[0146]

[0147] When the perpendicular point C falls on line segment AB, the perpendicular point C is the target chromaticity coordinate. The first chromaticity coordinate A, the second chromaticity coordinate B, and the chromaticity coordinate of the perpendicular point C can be substituted into formula (6) to calculate the first factor k at this time.

[0148] When the foot of the perpendicular C falls outside line segment AB, the first factor k is determined using the following formula:

[0149]

[0150] Where, x T y T This represents the target chromaticity coordinates, that is, the chromaticity coordinates of the first chromaticity coordinates A and the second chromaticity coordinates B that are closest to the perpendicular point coordinates C. The first chromaticity coordinates A, the second chromaticity coordinates B, and the target chromaticity coordinates (x...) are then considered. T y T Substituting into formula (7), we can calculate the first factor k at this point. It should be noted that the target chromaticity coordinates (x) here are... T y T ) can be (x1, y1, ) or (x2, y2).

[0151] In some embodiments, when the light source component includes two color blocks, and the target chromaticity coordinates are the perpendicular point coordinates or the chromaticity coordinates of the first and second chromaticity coordinates that are closest to the perpendicular point coordinates, the color difference compensation factor is determined through the following process:

[0152] Process (1) Determine the first parameter based on the first chromaticity coordinates and the target chromaticity coordinates;

[0153] Optionally, when the target chromaticity coordinates are the coordinates of the perpendicular point, the first parameter is: Where (x1, y1, ) are the first chromaticity coordinates, and (x0, y0) are the coordinates of the perpendicular point.

[0154] Optionally, when the target chromaticity coordinates are the chromaticity coordinates that are closest to the perpendicular point coordinates between the first and second chromaticity coordinates, the first parameter is: Where (x1, y1, ) are the first chromaticity coordinates, (x T y T ) represents the target chromaticity coordinates.

[0155] Process (2) Determine the second parameter based on the second chromaticity coordinates and the target chromaticity coordinates;

[0156] Optionally, when the target chromaticity coordinates are the coordinates of the perpendicular point, the second parameter is: Where (x0, y0) are the coordinates of the perpendicular foot point, and (x2, y2) are the second chromaticity coordinates.

[0157] Optionally, when the target chromaticity coordinates are the chromaticity coordinates closest to the perpendicular point coordinates among the first and second chromaticity coordinates, the second parameter is: Among them, (x T y T (x1, y2) are the target chromaticity coordinates, and (x2, y2) are the second chromaticity coordinates.

[0158] Process (3) Determine the first factor k based on the ratio of the first parameter to the second parameter;

[0159] Step (4) determines the color difference compensation factor based on the first factor and the brightness of the light source components of different color blocks. The brightness of the light source component is the brightness feature (Y) contained in the chromaticity coordinates in the color mixing space.

[0160] Optionally, when the target chromaticity coordinates are the perpendicular point coordinates, the first factor is determined by the above formula (6), that is, the ratio of the first parameter and the second parameter; when the target chromaticity coordinates are the chromaticity coordinates that are closest to the perpendicular point coordinates among the first chromaticity coordinates and the second chromaticity coordinates, the first factor is determined by the above formula (7).

[0161] After determining the first factor k, the color difference compensation factor is determined according to the following formula:

[0162] I B / I A =k×(Y2 / Y1) Formula (8);

[0163] Among them, I B / I A I represents the color difference compensation factor. A I represents the current at the first chromaticity coordinate A. B Y1 represents the current at the second chromaticity coordinate B; Y2 represents the brightness of the light source component at the first chromaticity coordinate A; and Y1 represents the brightness of the light source component at the second chromaticity coordinate B.

[0164] In some embodiments, when the light source component includes three color blocks; the chromaticity coordinates of the light source components for different color blocks include the third chromaticity coordinates of the light source component for the third color block, the fourth chromaticity coordinates of the light source component for the fourth color block, and the fifth chromaticity coordinates of the light source component for the fifth color block; the chromaticity coordinate range includes the coordinates within the triangle formed by the third chromaticity coordinates, the fourth chromaticity coordinates, and the fifth chromaticity coordinates; and the target chromaticity coordinates are the chromaticity coordinates of a preset white point located within the triangle, the color difference compensation factor is determined through the following process:

[0165] Process a: Determine the coordinates of the intersection point of the line connecting the third chromaticity coordinates and the chromaticity coordinates of the preset white point with the line connecting the fourth chromaticity coordinates and the fifth chromaticity coordinates;

[0166] During implementation, such as Figure 6 As shown in the diagram, this embodiment provides a schematic diagram of the chromaticity coordinates of a three-color block light source component. The third chromaticity coordinates are set as E(x3, y3, Y3), the fourth chromaticity coordinates as F(x4, y4, Y4), the fifth chromaticity coordinates as G(x5, y5, Y5), and the chromaticity coordinates of the preset white point as (0.313, 0.329). The intersection point D(x6, y6, Y6) of the lines EW and FG is then determined using the following formula:

[0167] (x6-x3)×(0.329-y3)=(0.313-x3)×(y6-y3)×(x6-x4)×(y5-y4)=(x5-x4)×(y6-y4)

[0168] Formula (9);

[0169] Formula (9) is determined based on the intersection formula of lines EW and FG.

[0170] Based on the derivation of formula (9):

[0171] x6=(0.313-x3)×(y6-y3) / (0.329-y3)+x3;

[0172] y6=(y4×(0.329-y3)×(x5-x4)-y3×(0.313-x3)×(y5-y4)+(0.329-y3)×(y5-y4)×(x3-x4)) / ((0.329-y3)×(x5-x4)-(0.313-x3)×(y5-y4));

[0173] Step b: Determine the second factor based on the third chromaticity coordinates, the chromaticity coordinates of the preset white point, and the coordinates of the intersection point, which is used to calculate the color difference compensation factor;

[0174] Step c: Determine the third factor based on the fourth chromaticity coordinates, the fifth chromaticity coordinates, and the intersection point coordinates, which is used to calculate the color difference compensation factor;

[0175] According to the color addition formula:

[0176]

[0177] Formula (10) represents the tristimulus value of the chromaticity coordinate W of the preset white point obtained by mixing the tristimulus value of the third chromaticity coordinate E with the tristimulus value of the intersection point D in a certain proportion. m represents the second factor.

[0178]

[0179] Formula (11) represents the tristimulus value of the intersection point D obtained by mixing the tristimulus values ​​of the fourth chromaticity coordinate F and the fifth chromaticity coordinate G in a certain proportion. n represents the third factor.

[0180] Substituting the calculated x6 and y6 into formulas (10) and (11) yields:

[0181] m=(x3 / y3-0.313 / 0.329) / (0.313 / 0.329-x6 / y6);

[0182] n=(x4 / y4-x6 / y6) / (x6 / y6-x5 / y5);

[0183] Where m represents the second factor and n represents the third factor.

[0184] Step d: Determine the color difference compensation factor based on the second factor, the third factor, and the brightness of the light source components for different color blocks.

[0185] In practice, the color difference compensation factor is determined using the following formula. In the case of a three-color block light source assembly, the color difference compensation factor includes a first color difference compensation factor and a second color difference compensation factor, as follows:

[0186] I D / I E =m×(Y6 / Y3), I G / I F =n×(Y5 / Y4) Formula (12);

[0187] Where m represents the second factor, n represents the third factor, and I D / I E I represents the second color difference compensation factor. G / I F Y represents the first color difference compensation factor, Y6 represents the brightness of the intersection point D, Y3 represents the brightness of the third chromaticity coordinate E, Y4 represents the brightness of the fourth chromaticity coordinate F, and Y5 represents the brightness of the fifth chromaticity coordinate G.

[0188] Step 302: Based on the color difference compensation factor, individually control and adjust the current of the light source components of different color blocks, so as to use the color obtained by mixing the light source components of the adjusted different color blocks to perform color difference compensation on the preset white point color.

[0189] In some embodiments, the current of the light source components for different color patches is adjusted using a color difference compensation factor in the following manner:

[0190] Based on the color difference compensation factor, the brightness of the light source components of different color blocks, and the preset total current value, the current value of the light source components of different color blocks is determined; based on the current value of the light source components of different color blocks, the current of the light source components of different color blocks is individually controlled and adjusted.

[0191] Optionally, when the light source component includes two color blocks, the chromaticity coordinates of the light source components for the two color blocks are the first chromaticity coordinate A(x1, y1, Y1) and the second chromaticity coordinate B(x2, y2, Y2), respectively, and the color difference compensation factor I... B / I A When =k×(Y2 / Y1), where k is the first factor, the current value of the light source component for different color blocks is determined by the following formula:

[0192] I A +I B =I Formula (13);

[0193] Among them, I A I represents the current at the first chromaticity coordinate A. B The current represents the second chromaticity coordinate B, and I represents the preset total current, according to the above formula (8) I B / I A =k×(Y2 / Y1) and formula (13) can be used to obtain:

[0194] When k > 0 and is not equal to infinity, I A =I / (k×(Y2 / Y1)+1);I B =II A ;

[0195] When k = 0, I B =0, I A =I; when k=∞, I B =I,I A =0.

[0196] Among them, I B / I A I represents the color difference compensation factor. A I represents the current at the first chromaticity coordinate A. B Y1 represents the current at the second chromaticity coordinate B; Y2 represents the brightness at the first chromaticity coordinate A; and Y1 represents the brightness at the second chromaticity coordinate B.

[0197] It should be noted that when the target chromaticity coordinates are the perpendicular point coordinates, the color difference compensation factor k > 0 and is not equal to infinity; when the target chromaticity coordinates are the chromaticity coordinates that are closest to the perpendicular point coordinates among the first and second chromaticity coordinates, the color difference compensation factor k = 0 or equal to infinity.

[0198] In some embodiments, when the color difference compensation factor is equal to zero, the current of the light source component of the second color block is controlled to be zero, and the current of the light source component of the first color block is a preset total current; or,

[0199] When the color difference compensation factor is equal to infinity, the current of the light source component of the first color block is controlled to be zero, and the current of the light source component of the second color block is the preset total current.

[0200] Optionally, when the light source component includes three color blocks, the chromaticity coordinates of the light source component for the three color blocks are the third chromaticity coordinate E(x3, y3, Y3), the fourth chromaticity coordinate F(x4, y4, Y4), and the fifth chromaticity coordinate G(x5, y5, Y5), respectively, and the color difference compensation factor includes a first color difference compensation factor and a second color difference compensation factor, which are respectively I D / I E I G / I F Then, the current value of the light source component for different color blocks is determined by the following formula:

[0201] I D =I F +I G I E +I F +I G =I Formula (14);

[0202] Among them, I E I represents the current at the third chromaticity coordinate E. F I represents the current at the fourth chromaticity coordinate F. G I represents the current at the fifth chromaticity coordinate G. D Let I represent the current at intersection point D, and let I represent the preset total current, according to the above formula (12): I D / I E =m×(Y6 / Y3), I G / I F =n×(Y5 / Y4) and formula (14) can be used to obtain the current values ​​of the light source components of color blocks E, F, and G, which are I respectively. E I F I G .

[0203] Among them, I D / I E I represents the second color difference compensation factor. G / I F Y represents the first color difference compensation factor, m represents the second factor, n represents the third factor, Y6 represents the brightness of the intersection point D, Y3 represents the brightness of the third chromaticity coordinate E, Y4 represents the brightness of the fourth chromaticity coordinate F, and Y5 represents the brightness of the fifth chromaticity coordinate G.

[0204] The preset total current in this embodiment is the total current preset according to the customer's required brightness for different models of products.

[0205] The light source components in this embodiment include, but are not limited to, LEDs.

[0206] In some embodiments, the light source component includes three color blocks; the light source component with different color blocks further includes:

[0207] By adjusting the phosphor ratio of different color blocks, an extended light source component is obtained by expanding the color blocks outward.

[0208] During implementation, such as Figure 7A The diagram shown is a schematic of the color block distribution of a currently mass-produced conventional LED product provided in this embodiment. Color blocks B and C are single bins, color blocks A and C are mixed bins, and color blocks B and D are mixed bins. Figure 7B The diagram shown is a schematic of the color block expansion distribution provided in this embodiment. The color blocks are expanded based on the mass-produced color blocks by adjusting the phosphor ratio of the tristimulus values ​​G and R of the LED. The expanded color blocks can realize different color block LED mixing schemes. When mixing ranks, the points marked 1, 2, and 3 are mixed around the chromaticity coordinates (0.313, 0.329) of the preset white point according to the maximum span. For example, the mixing can be carried out in the following ways: color block 1 + color block 7 + color block 19; color block 1 + color block 7 + color block 18; color block 6 + color block 12 + color block 14; color block 6 + color block 12 + color block 15, etc. Using this method of mixing, the target chromaticity coordinates obtained after mixing are closer to the chromaticity coordinates of the preset white point.

[0209] For LED light sources, even with the same color temperature of 3000K, different light sources will produce different colors. Light source suppliers typically divide the entire 3000K range into multiple bins, each with a slightly different color. This is used to refine the color temperature zoning, ensuring high consistency of color across different bins within the same color temperature range. A single bin refers to a single bin area, while a mixed bin refers to the combination of multiple different bins. This mixing, through the cross-mixing of emitted light, improves the color consistency of the illuminated area. This embodiment employs a mixed bin scheme using light source components with different color blocks, using the resulting mixed color to compensate for color differences in a preset white point color.

[0210] In some embodiments, the distribution pattern of the light source components for different color blocks in this embodiment includes any one or more of the following, as shown below:

[0211] Item 1: The light source components of the different color blocks are distributed in a cross pattern;

[0212] Item 2: The light source components are distributed according to a preset rule and are inclined relative to the horizontal plane;

[0213] Optionally, when the light source assembly includes one layer, the light source assemblies of different color blocks are distributed in a cross pattern, and the light source assembly of each color block is tilted relative to the horizontal plane; optionally, the tilt angle is consistent.

[0214] like Figure 8A As shown in the diagram, this embodiment provides a schematic diagram of LED components with different color blocks, where A, B, and C represent LEDs of different color blocks, namely, LEDs of color block A, LEDs of color block B, and LEDs of color block C. A, B, and C are distributed according to an inclined rule and are interleaved. This includes light source components for two color blocks or light source components for three color blocks.

[0215] Item 3, the light source assembly includes at least two layers, the light source assemblies in each layer are distributed according to a preset rule, and the spacing between the light source assemblies in one layer and the light source assemblies in the other layer in adjacent layers is opposite.

[0216] Optionally, when the light source assembly comprises two layers and includes two types of color blocks, the color blocks in the same layer are identical, and the color blocks in different layers are different, wherein the spacing between adjacent color blocks in one layer is opposite to that of the color blocks in the other layer; or,

[0217] When the light source assembly includes two layers and the light source assembly includes three color blocks, each layer includes three color blocks, and the three color blocks are distributed in an alternating manner, wherein the spacing between adjacent color blocks in one layer is opposite to that of color blocks in another layer.

[0218] like Figure 8B As shown in the diagram, this embodiment provides a schematic diagram of an LED assembly with different color blocks. A, B, and C represent LEDs of different color blocks, namely, LEDs of color block A, LEDs of color block B, and LEDs of color block C. A, B, and C are horizontally and regularly distributed, with gaps between adjacent color blocks in the upper layer LEDs, and these gaps are opposite to one of the color blocks in the lower layer LEDs. This can also be described as a double-layered, floral-style LED assembly. It includes light source components for two or three color blocks.

[0219] In some embodiments, this embodiment also provides a hotspot prevention countermeasure. Since conventional LED die-casting is prone to hotspot / colorspot defects in color difference compensation technologies, and because the LED current for different color blocks is individually controlled, it affects the brightness of individual LEDs, easily leading to uneven brightness in front of the light. By using a tilted / double-layer die-casting method to reduce LED pitch and allow for sufficient light mixing, hotspot / colorspot defects can be eliminated. However, this countermeasure is limited by the LED-AA distance and current adjustment. It is known that the LED-AA distance cannot be infinitely expanded in product design. After the limit LED-AA distance is determined, some LCD products experience a limitation in the adjustment range of the A and B series currents when adjusting the LED current. Theoretically, I... A and I B The adjustment range is 0 to I, where I is the preset total current. However, due to hotspot factors, some products can only be adjusted to a current value less than I. If I is further increased... A and I B If this happens, a hotspot defect will occur. Due to the limitation of the current adjustment range imposed by the hotspot, this embodiment provides a current-limited color difference compensation method, as follows:

[0220] It should be noted that when the current adjustment is limited, the color difference compensation factor is also limited. The preset critical range of the color difference compensation factor can be determined based on the limited range of current adjustment, and the color difference compensation factor can be limited. Then, the limited chromaticity coordinates can be calculated based on the color difference compensation factor within the preset critical range, and the limited chromaticity coordinates can be used as the target chromaticity coordinates that actually need to be adjusted.

[0221] In practice, when the color difference compensation factor exceeds the preset critical range, the following steps can also be performed:

[0222] Step 1) Determine the restricted chromaticity coordinates based on the preset critical range and the chromaticity coordinates of the light source components of different color blocks;

[0223] Optionally, if the color difference compensation factor exceeds a preset critical range, a critical value is determined based on the maximum or minimum value of the preset critical range; and restricted chromaticity coordinates are determined based on the critical value and the chromaticity coordinates of the light source components of different color blocks.

[0224] Scenario 1: The light source component includes two color blocks. The chromaticity coordinates of the light source components for the two color blocks are the first chromaticity coordinate A(x1, y1, Y1) and the second chromaticity coordinate B(x2, y2, Y2), respectively. The color difference compensation factor is I. B / I A = k×(Y2 / Y1), where k is the first factor.

[0225] During implementation, when the color difference compensation factor exceeds the preset critical range, that is, the adjustment range I of the current of the light source component for each color block... A and I B When restrictions are imposed, the first factor k is also restricted. The actual critical range of the actual critical first factor k0 is determined based on a preset proximity range as k0min ≤ k0 ≤ k0max. The actual critical first factor k0 can be determined in the following way:

[0226] When k≥k0max, k0=k0max; when k≤k0min, k0=k0min;

[0227] When k0min < k < k0max, k0 = k, meaning that the color difference compensation factor does not exceed the preset critical range at this time.

[0228] When the color difference compensation factor exceeds the preset critical range, that is, when the first factor k exceeds the actual critical range, the restricted chromaticity coordinates (x0', y0', Y0') are determined using the following formula:

[0229]

[0230] (x0'-x1)×(y2-y1)=(x2-x1)×(y0'-y1) Formula (16);

[0231] Where k0 represents the actual critical first factor, and x0' and y0' are the constrained chromaticity coordinates to be solved.

[0232] Based on formulas (15) and (16), the solution is obtained as follows:

[0233] x0'=(x1 / y1+k0×(x2 / y2)) / (1+k0)×y0';

[0234] In practice, if x1 = x2 and y1 = y2, then y0' = y1;

[0235] If x1 = x2 and y1 ≠ y2, then y0' = (1 + k0) / (1 / y1 + k0 / y2);

[0236] If x1≠x2,

[0237] Then y0'=((y2-y1) / (x2-x1)×x1-y1) / ((x1 / y1+k0×x2 / y2) / (1+k0)×(y2-y1) / (x2-x1)-1).

[0238] Scenario 2: The light source component includes three color blocks. The chromaticity coordinates of the light source component for the three color blocks are the third chromaticity coordinate E(x3, y3, Y3), the fourth chromaticity coordinate F(x4, y4, Y4), and the fifth chromaticity coordinate G(x5, y5, Y5), respectively. The color difference compensation factors include a first color difference compensation factor and a second color difference compensation factor, which are I... D / I E =m×(Y6 / Y3), I G / I F = n×(Y5 / Y4), where m represents the second factor, n represents the third factor, and I D / I E I represents the second color difference compensation factor. G / I F Y represents the first color difference compensation factor, Y6 represents the brightness of the intersection point D, Y3 represents the brightness of the third chromaticity coordinate E, Y4 represents the brightness of the fourth chromaticity coordinate F, and Y5 represents the brightness of the fifth chromaticity coordinate G.

[0239] During implementation, when the color difference compensation factor exceeds the preset critical range, that is, the adjustment range I of the current of the light source component for each color block... E I F and I G When restricted, the second factor m and the third factor n are also restricted. Based on the preset proximity range, the actual critical range of the second critical factor m0 is determined to be m0min ≤ m0 ≤ m0max; the actual critical range of the third critical factor n0 is determined to be n0min ≤ n0 ≤ n0max; where n0min = I F / I G , n0max=I G / I F ; where I F <I G ;m0min=I E / I D ,k0max=I D / I E Where I E <I D ,(I D =I F +I G I E +I F +I G =I), where I represents the preset total current, I D This represents the current at the intersection point D.

[0240] The actual critical second factor m0 can be determined in the following way:

[0241] When m≥m0max, m0=m0max;

[0242] When m ≤ m0min, m0 = m0min;

[0243] When m0min < m < m0max, m0 = m.

[0244] The actual critical third factor n0 can be determined in the following way:

[0245] When n≥n0max, n0=n0max;

[0246] When n≤n0min, n0=n0min;

[0247] When n0min < n < n0max, n0 = n.

[0248] The actual critical second factor m0 and the actual critical third factor n0 can be calculated using the above method.

[0249] When the color difference compensation factor exceeds the preset critical range, that is, when the second factor m and the third factor n exceed the actual critical range, the restricted chromaticity coordinates (x0', y0', Y0') are determined using the following formula:

[0250]

[0251] (x6'-x4)×(y5-y4)=(x5-x4)×(y6'-y4) Formula (18);

[0252] Where n0 is the actual critical third factor, and x6' and y6' are the chromaticity coordinates of the critical intersection point D to be solved.

[0253] The results are obtained by calculation using formulas (17) and (18):

[0254] x6'=(x4 / y4+n0×x5 / y5) / (1+n0)×y6';

[0255] y6'=((y5-y4) / (x5-x4)×x4-y4) / ((x4 / y4+n0×x5 / y5) / (1+n0)×(y5-y4) / (x5-x4)-1);

[0256] Similarly, we can obtain:

[0257] x6”=(x3 / y3+m0×x6’ / y6’) / (1+m0)×y6”;

[0258] y6"=((y6'-y3) / (x6'-x3)×x3-y3) / ((x3 / y3+m0×x6' / y6') / (1+m0)×(y6'-y3) / (x6'-x3)-1);

[0259] Where (x6”, y6”) are the target chromaticity coordinates that can actually be adjusted, i.e., the restricted chromaticity coordinates.

[0260] Step 2) Determine the new color difference compensation factor based on the restricted chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks;

[0261] In practice, the restricted chromaticity coordinates are taken as the target chromaticity coordinates that can actually be adjusted, as well as the chromaticity coordinates of the light source components of different color blocks. Following the same principle as determining the chromaticity compensation factor, a new chromaticity compensation factor is determined.

[0262] Step 3) Based on the new color difference compensation factor, individually control and adjust the current of the light source components of different color blocks so that the adjusted current is within the preset adjustment range.

[0263] In this embodiment, when using light source components with two color blocks for color difference compensation, the control range of the coordinate points of the light source components can be reduced to within (0.313, 0.329) ± 17‰, while the control range of the coordinate points without compensation is (0.313, 0.329) ± 30‰. When using light source components with three color blocks for color difference compensation, the control range of the coordinate points of the light source components can be reduced to within (0.313, 0.329) ± 0‰, while the control range of the coordinate points without compensation is (0.313, 0.329) ± 30‰. This effectively compensates for the white point coordinate drift caused by fluctuations in the CF process, BLU light guide plate, and LED, achieving a reduction in the module coordinate range, consistency of product shipment color, and improved product specifications.

[0264] To reduce the risk of hotspots, a tilted or double-layered arrangement can be used, and the LCM white dot color can be adjusted by individually controlling the LED current of each color block. For example... Figure 9 As shown in the figure, this embodiment provides a comparative diagram of the A / P limit of LED assembly, where A represents the distance from the LED to the effective light-emitting area of ​​the display, and P represents the pitch between the two LEDs. As can be seen from the figure, due to the tilted distribution of the LEDs, the light sources of different color blocks can be better mixed, thereby effectively reducing the hotspot / colorspot. Similarly, due to the double-layer flower arrangement assembly method, the light sources of different color blocks can also be better mixed, thereby effectively reducing the hotspot / colorspot.

[0265] Example 2: Based on the same inventive concept, this embodiment of the invention also provides a display device. Since this device is the same as the device in the method of this embodiment of the invention, and the principle of the device in solving the problem is similar to that of the method, the implementation of this device can refer to the implementation of the method, and the repeated parts will not be described again.

[0266] like Figure 10 As shown, the display device includes a light source assembly 1000 with different color blocks and a processor 1001, wherein:

[0267] The light source components 1000 for different color blocks are used to provide light sources of different colors;

[0268] The processor 1001 is configured to perform the following steps:

[0269] Determine the chromaticity coordinates of the light source components for different color blocks, wherein the chromaticity coordinates represent colors in the color mixing space;

[0270] Based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of the preset white point, a color difference compensation factor is determined, wherein the color difference compensation factor represents the color mixing ratio of the light source components of different color blocks;

[0271] Based on the color difference compensation factor, the current of the light source components of different color blocks is individually controlled and adjusted so as to use the color obtained by mixing the light source components of the adjusted different color blocks to perform color difference compensation on the preset white point color.

[0272] As an optional implementation, it also includes any one or more of the following:

[0273] The light source components of the different color blocks are distributed in a cross pattern;

[0274] The light source components are distributed according to a preset rule and are tilted relative to the horizontal plane;

[0275] The light source assembly includes at least two layers, with the light source assemblies in each layer distributed according to a preset rule, and the spacing between the light source assemblies in one layer and the light source assemblies in the other layer being opposite.

[0276] As an optional implementation method,

[0277] When the light source assembly comprises one layer, the light source assemblies for different color blocks are distributed in a staggered manner, and the light source assembly for each color block is tilted relative to the horizontal plane; or,

[0278] When the light source assembly comprises two layers and includes two types of color blocks, the color blocks in the same layer are identical, and the color blocks in different layers are different, wherein the spacing between adjacent color blocks in one layer is opposite to that of the color blocks in the other layer; or,

[0279] When the light source assembly includes two layers and the light source assembly includes three color blocks, each layer includes three color blocks, and the three color blocks are distributed in an alternating manner, wherein the spacing between adjacent color blocks in one layer is opposite to that of color blocks in another layer.

[0280] As an optional implementation, the light source assembly for the different color blocks further includes:

[0281] By adjusting the phosphor ratio of different color blocks, an extended light source component is obtained by expanding the color blocks outward.

[0282] As an optional implementation, the processor 1001 is specifically configured to execute:

[0283] According to the CIE chromaticity system's additive color theory, the chromaticity coordinates of the light source components of different color blocks are added together to obtain the chromaticity coordinate range;

[0284] Based on the chromaticity coordinates of a preset white point, select the target chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point from the range of chromaticity coordinates;

[0285] The color difference compensation factor is determined based on the target chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks.

[0286] As an optional implementation, the light source assembly includes two color blocks;

[0287] The chromaticity coordinates of the light source components of the different color blocks include the first chromaticity coordinates of the light source components of the first type of color block and the second chromaticity coordinates of the light source components of the second type of color block.

[0288] The chromaticity coordinate range includes the coordinates on the line segment formed by the first chromaticity coordinate and the second chromaticity coordinate.

[0289] As an optional implementation, the processor 1001 is specifically configured to, based on the chromaticity coordinates of a preset white point, filter out target chromaticity coordinates from the range of chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point in the following manner:

[0290] If the foot of the perpendicular from the chromaticity coordinates of the preset white point to the line segment falls on the line segment, then the target chromaticity coordinates are determined based on the coordinates of the foot of the perpendicular; or,

[0291] If the perpendicular point from the chromaticity coordinates of the preset white point to the line segment does not fall on the line segment, then the target chromaticity coordinates are determined based on the chromaticity coordinates that are closest to the perpendicular point coordinates between the first and second chromaticity coordinates.

[0292] As an optional implementation, the processor 1001 is specifically configured to determine the color difference compensation factor in the following manner:

[0293] The first factor is determined based on the first chromaticity coordinates, the second chromaticity coordinates, and the target chromaticity coordinates;

[0294] Based on the first factor and the brightness of the light source components of different color blocks, the color difference compensation factor is determined;

[0295] The brightness of the light source components for the different color blocks is determined based on the brightness characteristics contained in the chromaticity coordinates of the light source components for the different color blocks.

[0296] As an optional implementation, the processor 1001 is specifically configured to determine the color difference compensation factor using the following formula:

[0297] I B / I A = k×(Y2 / Y1);

[0298] Among them, I B / I A I represents the color difference compensation factor. A I represents the current of the light source component at the first chromaticity coordinate. B Y1 represents the current of the light source component at the second chromaticity coordinate; Y2 represents the brightness of the light source component at the first chromaticity coordinate; and Y1 represents the brightness of the light source component at the second chromaticity coordinate.

[0299] As an optional implementation, the processor 1001 is specifically configured to execute:

[0300] When the color difference compensation factor is equal to zero, the current of the light source component of the second color block is controlled to be zero, and the current of the light source component of the first color block is the preset total current; or,

[0301] When the color difference compensation factor is equal to infinity, the current of the light source component of the first color block is controlled to be zero, and the current of the light source component of the second color block is the preset total current.

[0302] As an optional implementation, the processor 1001 is specifically configured to execute:

[0303] For any given color block, the current of the light source components for other color blocks is controlled to zero.

[0304] The chromaticity coordinates of the light source component of any color block are determined based on the current of the light source component of any color block, wherein the current of the light source component of any color block is determined based on a preset total current and the number of different types of color blocks.

[0305] As an optional implementation, the light source assembly includes three color blocks;

[0306] The chromaticity coordinates of the light source components for the different color blocks include the third chromaticity coordinates of the light source component for the third color block, the fourth chromaticity coordinates of the light source component for the fourth color block, and the fifth chromaticity coordinates of the light source component for the fifth color block.

[0307] The chromaticity coordinate range includes the coordinates within the triangle formed by the third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate.

[0308] As an optional implementation, the processor 1001 is specifically configured to execute:

[0309] Using the chromaticity coordinates of a preset white point as the center, a triangular region containing the center is determined by the color block expansion method;

[0310] The third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate are determined based on the coordinates of the three vertices of the triangular region.

[0311] As an optional implementation, the processor 1001 is specifically configured to, based on the chromaticity coordinates of a preset white point, filter out target chromaticity coordinates from the range of chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point in the following manner:

[0312] When the chromaticity coordinates of the preset white point are located within the triangle, the target chromaticity coordinates are the chromaticity coordinates of the preset white point.

[0313] As an optional implementation, the processor 1001 is specifically configured to execute:

[0314] Determine the coordinates of the intersection point of the line connecting the third chromaticity coordinates and the chromaticity coordinates of the preset white point with the line connecting the fourth chromaticity coordinates and the fifth chromaticity coordinates;

[0315] The second factor is determined based on the third chromaticity coordinates, the chromaticity coordinates of the preset white point, and the coordinates of the intersection point;

[0316] The third factor is determined based on the fourth chromaticity coordinates, the fifth chromaticity coordinates, and the intersection point coordinates;

[0317] The color difference compensation factor is determined based on the second factor, the third factor, and the brightness of the light source components for different color blocks.

[0318] As an optional implementation, the color difference compensation factor includes a first color difference compensation factor and a second color difference compensation factor, and the processor 1001 is specifically configured to determine the color difference compensation factor using the following formula:

[0319] I D / I E =m×(Y6 / Y3), I G / I F = n×(Y5 / Y4);

[0320] Where m represents the second factor, n represents the third factor, and I D / IE I represents the second color difference compensation factor. G / I F Y represents the first color difference compensation factor, Y6 represents the brightness of the light source component at the intersection coordinates, Y3 represents the brightness of the light source component at the third chromaticity coordinates, Y4 represents the brightness of the light source component at the fourth chromaticity coordinates, and Y5 represents the brightness of the light source component at the fifth chromaticity coordinates.

[0321] As an optional implementation, the processor 1001 is specifically configured to execute:

[0322] Based on the color difference compensation factor, the brightness of the light source components of different color blocks, and the preset total current value, the current value of the light source components of different color blocks is determined.

[0323] Based on the current value of the light source components for different color blocks, the current of the light source components for different color blocks is individually controlled and adjusted.

[0324] As an optional implementation, when the color difference compensation factor exceeds a preset critical range, the processor 1001 is further configured to execute:

[0325] Based on the preset critical range and the chromaticity coordinates of the light source components of different color blocks, the restricted chromaticity coordinates are determined;

[0326] Based on the restricted chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks, a new color difference compensation factor is determined;

[0327] Based on the new color difference compensation factor, the current of the light source components for different color blocks is individually controlled and adjusted so that the adjusted current is within a preset adjustment range.

[0328] As an optional implementation, the processor 1001 is specifically configured to execute:

[0329] If the color difference compensation factor exceeds the preset critical range, then the critical value is determined based on the maximum or minimum value of the preset critical range.

[0330] Based on the critical value and the chromaticity coordinates of the light source components for different color blocks, the restricted chromaticity coordinates are determined.

[0331] Example 3: Based on the same inventive concept, this embodiment of the invention also provides a color difference compensation device. Since this device is the same as the device in the method of this embodiment of the invention, and the principle of the device in solving the problem is similar to that of the method, the implementation of this device can refer to the implementation of the method, and the repeated parts will not be described again.

[0332] like Figure 11 As shown, the device includes:

[0333] The coordinate determination module 1100 is used to determine the chromaticity coordinates of the light source components of different color blocks, wherein the chromaticity coordinates represent the colors in the color mixing space;

[0334] The compensation module 1101 is used to determine the color difference compensation factor based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of the preset white point. The color difference compensation factor represents the color mixing ratio of the light source components of different color blocks.

[0335] The current adjustment module 1102 is used to individually control and adjust the current of the light source components of different color blocks according to the color difference compensation factor, so as to use the color obtained by mixing the light source components of the different color blocks after adjustment to perform color difference compensation on the preset white point color.

[0336] As an optional implementation, the compensation determination module 1101 is specifically used for:

[0337] According to the CIE chromaticity system's additive color theory, the chromaticity coordinates of the light source components of different color blocks are added together to obtain the chromaticity coordinate range;

[0338] Based on the chromaticity coordinates of a preset white point, select the target chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point from the range of chromaticity coordinates;

[0339] The color difference compensation factor is determined based on the target chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks.

[0340] As an optional implementation, the light source assembly includes two color blocks;

[0341] The chromaticity coordinates of the light source components of the different color blocks include the first chromaticity coordinates of the light source components of the first type of color block and the second chromaticity coordinates of the light source components of the second type of color block.

[0342] The chromaticity coordinate range includes the coordinates on the line segment formed by the first chromaticity coordinate and the second chromaticity coordinate.

[0343] As an optional implementation, the compensation determination module 1101 specifically selects the target chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point from the range of chromaticity coordinates in the following manner:

[0344] If the foot of the perpendicular from the chromaticity coordinates of the preset white point to the line segment falls on the line segment, then the target chromaticity coordinates are determined based on the coordinates of the foot of the perpendicular; or,

[0345] If the perpendicular point from the chromaticity coordinates of the preset white point to the line segment does not fall on the line segment, then the target chromaticity coordinates are determined based on the chromaticity coordinates that are closest to the perpendicular point coordinates between the first and second chromaticity coordinates.

[0346] As an optional implementation, the compensation determination module 1101 specifically determines the color difference compensation factor in the following manner:

[0347] The first factor is determined based on the first chromaticity coordinates, the second chromaticity coordinates, and the target chromaticity coordinates;

[0348] Based on the first factor and the brightness of the light source components of different color blocks, the color difference compensation factor is determined;

[0349] The brightness of the light source components for the different color blocks is determined based on the brightness characteristics contained in the chromaticity coordinates of the light source components for the different color blocks.

[0350] As an optional implementation, the compensation determination module 1101 specifically determines the color difference compensation factor using the following formula:

[0351] I B / I A = k×(Y2 / Y1);

[0352] Among them, I B / I A I represents the color difference compensation factor. A I represents the current of the light source component at the first chromaticity coordinate. B Y1 represents the current of the light source component at the second chromaticity coordinate; Y2 represents the brightness of the light source component at the first chromaticity coordinate; and Y1 represents the brightness of the light source component at the second chromaticity coordinate.

[0353] As an optional implementation method,

[0354] When the color difference compensation factor is equal to zero, the current of the light source component of the second color block is controlled to be zero, and the current of the light source component of the first color block is the preset total current; or,

[0355] When the color difference compensation factor is equal to infinity, the current of the light source component of the first color block is controlled to be zero, and the current of the light source component of the second color block is the preset total current.

[0356] As an optional implementation, the coordinate determination module 1100 is specifically used for:

[0357] For any given color block, the current of the light source components for other color blocks is controlled to zero.

[0358] The chromaticity coordinates of the light source component of any color block are determined based on the current of the light source component of any color block, wherein the current of the light source component of any color block is determined based on a preset total current and the number of different types of color blocks.

[0359] As an optional implementation, the light source assembly includes three color blocks;

[0360] The chromaticity coordinates of the light source components for the different color blocks include the third chromaticity coordinates of the light source component for the third color block, the fourth chromaticity coordinates of the light source component for the fourth color block, and the fifth chromaticity coordinates of the light source component for the fifth color block.

[0361] The chromaticity coordinate range includes the coordinates within the triangle formed by the third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate.

[0362] As an optional implementation, the coordinate determination module 1100 is specifically used for:

[0363] Using the chromaticity coordinates of a preset white point as the center, a triangular region containing the center is determined by the color block expansion method;

[0364] The third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate are determined based on the coordinates of the three vertices of the triangular region.

[0365] As an optional implementation, the coordinate determination module 1100 specifically selects the target chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point from the range of chromaticity coordinates in the following manner:

[0366] When the chromaticity coordinates of the preset white point are located within the triangle, the target chromaticity coordinates are the chromaticity coordinates of the preset white point.

[0367] As an optional implementation, the compensation determination module 1101 is specifically used for:

[0368] Determine the coordinates of the intersection point of the line connecting the third chromaticity coordinates and the chromaticity coordinates of the preset white point with the line connecting the fourth chromaticity coordinates and the fifth chromaticity coordinates;

[0369] The second factor is determined based on the third chromaticity coordinates, the chromaticity coordinates of the preset white point, and the coordinates of the intersection point;

[0370] The third factor is determined based on the fourth chromaticity coordinates, the fifth chromaticity coordinates, and the intersection point coordinates;

[0371] The color difference compensation factor is determined based on the second factor, the third factor, and the brightness of the light source components for different color blocks.

[0372] As an optional implementation, the color difference compensation factor includes a first color difference compensation factor and a second color difference compensation factor, and the compensation determination module 1101 specifically determines the color difference compensation factor using the following formula:

[0373] I D / I E =m×(Y6 / Y3), I G / I F = n×(Y5 / Y4);

[0374] Where m represents the second factor, n represents the third factor, and I D / I E I represents the second color difference compensation factor. G / I F Y represents the first color difference compensation factor, Y6 represents the brightness of the light source component at the intersection coordinates, Y3 represents the brightness of the light source component at the third chromaticity coordinates, Y4 represents the brightness of the light source component at the fourth chromaticity coordinates, and Y5 represents the brightness of the light source component at the fifth chromaticity coordinates.

[0375] As an optional implementation, the current adjustment module 1102 is specifically used for:

[0376] Based on the color difference compensation factor, the brightness of the light source components of different color blocks, and the preset total current value, the current value of the light source components of different color blocks is determined.

[0377] Based on the current value of the light source components for different color blocks, the current of the light source components for different color blocks is individually controlled and adjusted.

[0378] As an optional implementation, when the color difference compensation factor exceeds a preset critical range, an update unit is further included, specifically for:

[0379] Based on the preset critical range and the chromaticity coordinates of the light source components of different color blocks, the restricted chromaticity coordinates are determined;

[0380] Based on the restricted chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks, a new color difference compensation factor is determined;

[0381] Based on the new color difference compensation factor, the current of the light source components for different color blocks is individually controlled and adjusted so that the adjusted current is within a preset adjustment range.

[0382] As an optional implementation, the update unit is specifically used for:

[0383] If the color difference compensation factor exceeds the preset critical range, then the critical value is determined based on the maximum or minimum value of the preset critical range.

[0384] Based on the critical value and the chromaticity coordinates of the light source components for different color blocks, the restricted chromaticity coordinates are determined.

[0385] Based on the same inventive concept, embodiments of the present invention also provide a computer storage medium storing a computer program, which, when executed by a processor, performs the following steps:

[0386] Determine the chromaticity coordinates of the light source components for different color blocks, wherein the chromaticity coordinates represent colors in the color mixing space;

[0387] Based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of the preset white point, a color difference compensation factor is determined, wherein the color difference compensation factor represents the color mixing ratio of the light source components of different color blocks;

[0388] Based on the color difference compensation factor, the current of the light source components of different color blocks is individually controlled and adjusted so as to use the color obtained by mixing the light source components of the adjusted different color blocks to perform color difference compensation on the preset white point color.

[0389] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0390] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 Devices that specify the functions in one or more boxes.

[0391] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including an instruction device, which is implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0392] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0393] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A color difference compensation method, characterized in that, Applied to a display device, the display device including light source components of different color blocks, the method includes: Determine the chromaticity coordinates of the light source components for different color blocks, wherein the chromaticity coordinates represent colors in the color mixing space; Based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of the preset white point, a color difference compensation factor is determined, wherein the color difference compensation factor represents the color mixing ratio of the light source components of different color blocks; Based on the color difference compensation factor, the current of the light source components of different color blocks is individually controlled and adjusted so as to use the color obtained by mixing the light source components of the adjusted different color blocks to perform color difference compensation on the preset white point color. When the color difference compensation factor exceeds the preset critical range, the method further includes: determining restricted chromaticity coordinates based on the preset critical range and the chromaticity coordinates of the light source components of different color blocks; determining a new color difference compensation factor based on the restricted chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks; and controlling and adjusting the current of the light source components of different color blocks individually based on the new color difference compensation factor so that the adjusted current is within the preset adjustment range.

2. The method according to claim 1, characterized in that, The step of determining the color difference compensation factor based on the chromaticity coordinates of the light source components of different color blocks and the chromaticity coordinates of the preset white point includes: According to the CIE chromaticity system's additive color theory, the chromaticity coordinates of the light source components of different color blocks are added together to obtain the chromaticity coordinate range; Based on the chromaticity coordinates of a preset white point, select the target chromaticity coordinates that are closest to the chromaticity coordinates of the preset white point from the range of chromaticity coordinates; The color difference compensation factor is determined based on the target chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks.

3. The method according to claim 2, characterized in that, The light source component includes two color blocks; The chromaticity coordinates of the light source components of the different color blocks include the first chromaticity coordinates of the light source components of the first type of color block and the second chromaticity coordinates of the light source components of the second type of color block. The chromaticity coordinate range includes the coordinates on the line segment formed by the first chromaticity coordinate and the second chromaticity coordinate.

4. The method according to claim 3, characterized in that, Based on the chromaticity coordinates of a preset white point, target chromaticity coordinates that are closest to the preset white point are selected from the range of chromaticity coordinates as follows: If the perpendicular point from the chromaticity coordinates of the preset white point to the line segment falls on the line segment, then the target chromaticity coordinates are determined based on the coordinates of the perpendicular point. or, If the perpendicular point from the chromaticity coordinates of the preset white point to the line segment does not fall on the line segment, then the target chromaticity coordinates are determined based on the chromaticity coordinates that are closest to the perpendicular point coordinates between the first and second chromaticity coordinates.

5. The method according to claim 3, characterized in that, The color difference compensation factor is determined as follows: The first factor is determined based on the first chromaticity coordinates, the second chromaticity coordinates, and the target chromaticity coordinates; Based on the first factor and the brightness of the light source components of different color blocks, the color difference compensation factor is determined; The brightness of the light source components for the different color blocks is determined based on the brightness characteristics contained in the chromaticity coordinates of the light source components for the different color blocks.

6. The method according to claim 5, characterized in that, The color difference compensation factor is determined using the following formula: I B / I A =k×(Y2 / Y1); Among them, I B / I A I represents the color difference compensation factor. A I represents the current of the light source component at the first chromaticity coordinate. B Y1 represents the current of the light source component at the second chromaticity coordinate; Y2 represents the brightness of the light source component at the first chromaticity coordinate; and Y1 represents the brightness of the light source component at the second chromaticity coordinate.

7. The method according to claim 3, characterized in that, When the color difference compensation factor is equal to zero, the current of the light source component of the second color block is controlled to be zero, and the current of the light source component of the first color block is the preset total current; or, When the color difference compensation factor is equal to infinity, the current of the light source component of the first color block is controlled to be zero, and the current of the light source component of the second color block is the preset total current.

8. The method according to claim 3, characterized in that, Determining the chromaticity coordinates of the light source components for different color blocks includes: For any given color block, the current of the light source components for other color blocks is controlled to zero. The chromaticity coordinates of the light source component of any color block are determined based on the current of the light source component of any color block, wherein the current of the light source component of any color block is determined based on a preset total current and the number of different types of color blocks.

9. The method according to claim 2, characterized in that, The light source component includes three color blocks; The chromaticity coordinates of the light source components of the different color blocks include the third chromaticity coordinates of the light source component of the third color block, the fourth chromaticity coordinates of the light source component of the fourth color block, and the fifth chromaticity coordinates of the light source component of the fifth color block. The chromaticity coordinate range includes the coordinates within the triangle formed by the third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate.

10. The method according to claim 9, characterized in that, Determining the chromaticity coordinates of the light source components for different color blocks includes: Using the chromaticity coordinates of a preset white point as the center, a triangular region containing the center is determined by the color block expansion method; The third chromaticity coordinate, the fourth chromaticity coordinate, and the fifth chromaticity coordinate are determined based on the coordinates of the three vertices of the triangular region.

11. The method according to claim 9, characterized in that, Based on the chromaticity coordinates of a preset white point, target chromaticity coordinates that are closest to the preset white point are selected from the range of chromaticity coordinates as follows: When the chromaticity coordinates of the preset white point are located within the triangle, the target chromaticity coordinates are the chromaticity coordinates of the preset white point.

12. The method according to claim 9, characterized in that, The step of determining the color difference compensation factor based on the target chromaticity coordinates and the chromaticity coordinates of the light source components of different color blocks includes: Determine the coordinates of the intersection point of the line connecting the third chromaticity coordinates and the chromaticity coordinates of the preset white point with the line connecting the fourth chromaticity coordinates and the fifth chromaticity coordinates; The second factor is determined based on the third chromaticity coordinates, the chromaticity coordinates of the preset white point, and the coordinates of the intersection point; The third factor is determined based on the fourth chromaticity coordinates, the fifth chromaticity coordinates, and the intersection point coordinates; The color difference compensation factor is determined based on the second factor, the third factor, and the brightness of the light source components for different color blocks.

13. The method according to claim 12, characterized in that, The color difference compensation factor includes a first color difference compensation factor and a second color difference compensation factor, which is determined by the following formula: I D / I E =m×(Y6 / Y3) ,I G / I F =n×(Y5 / Y4); Where m represents the second factor, n represents the third factor, and I D / I E I represents the second color difference compensation factor. G / I F Y represents the first color difference compensation factor, Y6 represents the brightness of the light source component at the intersection coordinates, Y3 represents the brightness of the light source component at the third chromaticity coordinates, Y4 represents the brightness of the light source component at the fourth chromaticity coordinates, and Y5 represents the brightness of the light source component at the fifth chromaticity coordinates.

14. The method according to claim 1, characterized in that, The step of individually controlling and adjusting the current of the light source components for different color blocks according to the color difference compensation factor includes: Based on the color difference compensation factor, the brightness of the light source components of different color blocks, and the preset total current value, the current value of the light source components of different color blocks is determined. Based on the current value of the light source components for different color blocks, the current of the light source components for different color blocks is individually controlled and adjusted.

15. The method according to claim 1, characterized in that, The step of determining the restricted chromaticity coordinates based on the preset critical range and the chromaticity coordinates of the light source components of different color blocks includes: If the color difference compensation factor exceeds the preset critical range, then the critical value is determined based on the maximum or minimum value of the preset critical range. Based on the critical value and the chromaticity coordinates of the light source components for different color blocks, the restricted chromaticity coordinates are determined.

16. A display device, characterized in that, Includes light source components and processors for different color blocks, wherein: The light source components for the different color blocks are used to provide light sources of different colors; The processor is configured to perform the steps of the method according to any one of claims 1 to 15.

17. The device according to claim 16, characterized in that, It also includes any one or more of the following: The light source components of the different color blocks are distributed in a cross pattern; The light source components are distributed according to a preset rule and are tilted relative to the horizontal plane; The light source assembly includes at least two layers, with the light source assemblies in each layer distributed according to a preset rule, and the spacing between the light source assemblies in one layer and the light source assemblies in the other layer being opposite.

18. The device according to claim 17, characterized in that, When the light source assembly comprises one layer, the light source assemblies for different color blocks are distributed in a staggered manner, and the light source assembly for each color block is tilted relative to the horizontal plane; or, When the light source assembly comprises two layers and includes two types of color blocks, the color blocks in the same layer are identical, and the color blocks in different layers are different, wherein the spacing between adjacent color blocks in one layer is opposite to that of the color blocks in the other layer; or, When the light source assembly includes two layers and the light source assembly includes three color blocks, each layer includes three color blocks, and the three color blocks are distributed in an alternating manner, wherein the spacing between adjacent color blocks in one layer is opposite to that of color blocks in another layer.

19. The device according to claim 16, characterized in that, The light source components for the different color blocks also include: By adjusting the phosphor ratio of different color blocks, an extended light source component is obtained by expanding the color blocks outward.

20. A computer storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in any one of claims 1 to 15.

Images