Color temperature correction method and device of liquid crystal display system and storage medium

Abstract

The invention discloses a color temperature correction method and device of a liquid crystal display system and a storage medium. The method comprises the following steps: determining tristimulus values of original white pixel points of the system in a CIE 1931XYZ color space according to normalized spectral power distribution of a white light backlight source of the liquid crystal display system and a transmittance spectrum of a three-primary color filter of a color film; determining a target RGB color space and a target color temperature, and constructing a color space conversion matrix from the target color space to an XYZ color space; converting the tristimulus values of the original white pixel points of the system in the XYZ color space into the three-primary color channel values of the target white pixel points under the target color temperature in the target color space by using the inverse matrix of the color space conversion matrix; and driving the system to display white according to the three-primary color channel value of the target white pixel point. According to the scheme, the color temperature correction of the liquid crystal display system is realized through a method of combining measurement and theoretical calculation, and the color temperature correction efficiency is improved.

Description

Technical Field

[0001] This document relates to display technologies, and particularly to a method, apparatus, and storage medium for color temperature correction of a liquid crystal display system. Background Art

[0002] Color temperature is an important indicator for measuring the color performance of a light source, which affects the accuracy and authenticity of the colors presented by a display product. Correct color temperature setting can ensure that a display product (such as a monitor, a TV, etc.) presents colors closer to reality and improves color reproduction. Different color temperatures will produce different visual sensations. Too high a color temperature may make the picture appear blue, giving a cold feeling; while too low a color temperature may make the picture appear red, giving a warm feeling. Therefore, the color temperature correction of a display product is an important link in ensuring product performance. Summary of the Invention

[0003] An embodiment of the present application provides a method for color temperature correction of a liquid crystal display system, including:

[0004] Determining the tristimulus values of the original white pixel points of the liquid crystal display system in the CIE 1931 XYZ color space according to the normalized spectral power distribution of the white backlight source of the liquid crystal display system and the transmittance spectra of the three primary color filters of the color film;

[0005] Determining the target RGB color space and target color temperature that the liquid crystal display system is to satisfy, constructing a color space conversion matrix from the target RGB color space to the CIE 1931 XYZ color space; and converting the tristimulus values of the original white pixel points of the liquid crystal display system in the CIE 1931 XYZ color space into the three primary color channel values of the target white pixel points at the target color temperature in the target RGB color space by using the inverse matrix of the color space conversion matrix;

[0006] Driving the liquid crystal display system to display white according to the three primary color channel values of the target white pixel points.

[0007] An embodiment of the present application provides a device for color temperature correction of a liquid crystal display system, including: a memory and a processor, where the memory stores a computer program, and when the computer program is executed by the processor, the steps of the above-mentioned method for color temperature correction of the liquid crystal display system are implemented.

[0008] An embodiment of the present application provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned method for color temperature correction of the liquid crystal display system are implemented.

[0009] A method, device and storage medium for color temperature correction of a liquid crystal display system provided by an embodiment of the present application determine the tristimulus values of the original white pixel points of the liquid crystal display system in the CIE 1931 XYZ color space according to the normalized spectral power distribution of the white backlight source of the liquid crystal display system and the transmittance spectra of the three primary color filters of the color film; determine the target RGB color space and target color temperature that the liquid crystal display system needs to satisfy, and construct a color space conversion matrix from the target RGB color space to the CIE 1931 XYZ color space; use the inverse matrix of the color space conversion matrix to convert the tristimulus values of the original white pixel points of the liquid crystal display system in the CIE 1931 XYZ color space into the three primary color channel values of the target white pixel points at the target color temperature in the target RGB color space; drive the liquid crystal display system to display white according to the three primary color channel values of the target white pixel points. The technical solution provided by the above embodiment realizes the color temperature correction of the liquid crystal display system through a method combining measurement and theoretical calculation, and improves the color temperature correction efficiency of the liquid crystal display system.

[0010] Other features and advantages of the present application will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present application. Other advantages of the present application can be realized and obtained through the solutions described in the specification and the drawings. Description of the Drawings

[0011] The drawings are used to provide an understanding of the technical solutions of the present application, and constitute a part of the specification. They are used together with the embodiments of the present application to explain the technical solutions of the present application, and do not constitute a limitation to the technical solutions of the present application.

[0012] Figure 1 It is a flowchart of a method for color temperature correction of a liquid crystal display system provided by an embodiment of the present application;

[0013] Figure 2 It is a schematic diagram of the normalized spectral power distribution of the white backlight source of a liquid crystal display system and the transmittance spectra of the three primary color filters of the color film provided by an embodiment of the present application;

[0014] Figure 3 It is a schematic structural diagram of a device for color temperature correction of a liquid crystal display system provided by an embodiment of the present application. Detailed Embodiments

[0015] This application describes multiple embodiments, but the description is exemplary rather than restrictive, and it will be apparent to those of ordinary skill in the art that there can be more embodiments and implementation solutions within the scope covered by the embodiments described in this application. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically restricted, any feature or element of any embodiment can be combined with any other feature or element in any other embodiment, or can replace any other feature or element in any other embodiment.

[0016] This application includes and contemplates combinations with features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in this application can also be combined with any conventional features or elements to form unique inventive solutions. Any feature or element of any embodiment can also be combined with features or elements from other inventive solutions to form another unique inventive solution. Therefore, it should be understood that any feature shown and / or discussed in this application can be implemented alone or in any suitable combination. Therefore, the embodiments are not subject to other restrictions except those made in accordance with the appended claims and their equivalents. In addition, various modifications and changes can be made within the scope of the appended claims.

[0017] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not depend on the specific sequence of steps described herein, the method or process should not be limited to the specific sequence of steps described. As will be understood by those of ordinary skill in the art, other sequences of steps are possible. Therefore, the specific sequence of steps set forth in the specification should not be construed as a limitation on the claims. In addition, the claims directed to the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can readily understand that these orders can vary and still remain within the spirit and scope of the embodiments of this application.

[0018] As Figure 1 shown, an embodiment of the present disclosure provides a method for color temperature correction of a liquid crystal display system, including:

[0019] Step S10, determining the tristimulus values of the original white pixel points of the liquid crystal display system in the CIE 1931 XYZ color space according to the normalized spectral power distribution of the white backlight source of the liquid crystal display system and the transmittance spectra of the three primary color filters of the color film;

[0020] Step S20: Determine the target RGB color space and target color temperature that the liquid crystal display system needs to satisfy, and construct a color space conversion matrix from the target RGB color space to the CIE 1931 XYZ color space; use the inverse matrix of the color space conversion matrix to convert the tristimulus values of the original white pixel points of the liquid crystal display system in the CIE 1931 XYZ color space into the primary color channel values of the target white pixel points at the target color temperature in the target RGB color space;

[0021] Step S30: Drive the liquid crystal display system to display white according to the primary color channel values of the target white pixel points.

[0022] The color temperature correction method for a liquid crystal display system provided in the above embodiment determines the tristimulus values of the original white pixel points of the liquid crystal display system in the CIE 1931 XYZ color space according to the normalized spectral power distribution of the white light backlight source of the liquid crystal display system and the transmittance spectra of the three primary color filters of the color film; determines the target RGB color space and target color temperature that the liquid crystal display system needs to satisfy, and constructs a color space conversion matrix from the target RGB color space to the CIE 1931 XYZ color space; uses the inverse matrix of the color space conversion matrix to convert the tristimulus values of the original white pixel points of the liquid crystal display system in the CIE 1931 XYZ color space into the primary color channel values of the target white pixel points at the target color temperature in the target RGB color space; drives the liquid crystal display system to display white according to the primary color channel values of the target white pixel points. The method provided in the above embodiment realizes the color temperature correction of the liquid crystal display system through a method combining measurement and theoretical calculation, and improves the color temperature correction efficiency of the liquid crystal display system.

[0023] In an exemplary implementation manner, determining the tristimulus values of the original white pixel points of the liquid crystal display system in the CIE 1931 XYZ color space according to the normalized spectral power distribution of the white light backlight source of the liquid crystal display system and the transmittance spectra of the three primary color filters of the color film includes:

[0024] Taking the product of the normalized spectral power distribution of the white light backlight source of the liquid crystal display system and the transmittance spectra of each primary color filter of the color film as the normalized spectral power distribution of the corresponding primary color pixel points of the liquid crystal display system;

[0025] Integrating the product of the normalized spectral power distribution of each primary color pixel point of the liquid crystal display system and the color matching function of the CIE 1931 XYZ color space within the visible light wavelength range of the human eye to obtain the tristimulus values of the corresponding primary color pixel points of the liquid crystal display system;

[0026] The sum of the tristimulus values of the three primary color pixels of the liquid crystal display system is used as the tristimulus values of the original white pixel of the liquid crystal display system.

[0027] Figure 2 The normalized spectral power distribution of the white light backlight source of the liquid crystal display system is given and the transmittance spectra k R (λ), k G (λ) and k B (λ) of the three primary color filters of the color film. The white light spectral power distribution of the white light backlight source and the transmittance spectrum k R (λ) of the red filter of the color film are multiplied to obtain the normalized spectral power distribution S R (λ) of the red pixel of the liquid crystal display system. The white light spectral power distribution of the white light backlight source and the transmittance spectrum k G (λ) of the green filter of the color film are multiplied to obtain the normalized spectral power distribution S G (λ) of the green pixel of the liquid crystal display system. The white light spectral power distribution of the white light backlight source and the transmittance spectrum k B (λ) of the blue filter of the color film are multiplied to obtain the normalized spectral power distribution S B (λ) of the blue pixel of the liquid crystal display system.

[0028] The product of the normalized spectral power distribution S R (λ) of the red pixel of the liquid crystal display system and the color matching function in the CIE 1931 XYZ color space is integrated within the visible wavelength range of the human eye to obtain the tristimulus values X R , Y R , and Z R ;

[0029]

[0030] The product of the normalized spectral power distribution S G (λ) of the green pixel of the liquid crystal display system and the color matching function in the CIE 1931 XYZ color space is integrated within the visible wavelength range of the human eye to obtain the tristimulus values X G , Y G , and Z G ;

[0031]

[0032] Integrate the product of the normalized spectral power distribution S B (λ) of the blue pixel points of the liquid crystal display system and the color matching functions in the CIE 1931 XYZ color space within the visible light wavelength range of the human eye to obtain the tristimulus values X B 、Y B 、and Z B ;

[0033]

[0034] Among them, is the X component of the color matching function in the CIE 1931 XYZ color space, is the Y component of the color matching function in the CIE 1931 XYZ color space, is the Z component of the color matching function in the CIE 1931 XYZ color space.

[0035] The color matching functions in the CIE 1931 XYZ color space are standard functions for converting light radiation in the visible spectrum into XYZ tristimulus values, and are a set of functions for describing the perception characteristics of the human eye to light of different wavelengths. These functions are obtained based on a large number of color matching experiments and are respectively denoted as and respectively represent the relative responses of the human eye to three imaginary primary colors of red, green, and blue at different wavelengths λ.

[0036] In an exemplary embodiment, the normalized spectral power distribution S(λ) of any primary color pixel points of the liquid crystal display system is a data set of the normalized spectral power distribution, including N wavelength points λ i corresponding normalized spectral power values S i ;

[0037] The color matching functions in the CIE 1931 XYZ color space are a data set of the spectral tristimulus values of the CIE 1931 standard colorimetric observer, including N wavelength points λ i corresponding tristimulus values (X i , Y i , Z i );

[0038] Among them, N is an integer greater than 1, and 1 ≤ i ≤ N.

[0039] The CIE 1931 XYZ color space selects X, Y, and Z as the primary colors. Using these three primary colors to match the equal-energy spectral colors, the spectral tristimulus values are standardized and named "CIE 1931 standard colorimetric observer spectral tristimulus values". The wavelength range of the dataset of the CIE 1931 standard colorimetric observer spectral tristimulus values is from 380 nm to 780 nm (visible spectrum), and the sampling interval can be 1 nm or 5 nm.

[0040] Table 1 below gives an example of a partial dataset of the CIE 1931 standard colorimetric observer spectral tristimulus values (wavelength interval 5 nm)

[0041]

[0042] Table 1

[0043] In an exemplary embodiment, the product of the normalized spectral power distribution of each primary color pixel of the liquid crystal display system and the color matching function of the CIE 1931 XYZ color space is integrated within the visible wavelength range of the human eye to obtain the tristimulus values of the corresponding primary color pixels of the liquid crystal display system, including:

[0044] Use the following formulas 1_1 to 1_3 to calculate the tristimulus values X, Y, and Z of any primary color pixel of the liquid crystal display system;

[0045]

[0046] where Δλ is the wavelength interval between any two adjacent wavelength points, and N wavelength points are arranged at equal intervals.

[0047] The normalized spectral power distribution S R (λ) of the red pixel of the liquid crystal display system is a dataset of the normalized spectral power distribution, including the normalized spectral power values S i corresponding to N wavelength points λ Ri ; the color matching function of the CIE 1931 XYZ color space is a dataset of the CIE 1931 standard colorimetric observer spectral tristimulus values, including the tristimulus values (X i , Y i , Z i ) corresponding to N wavelength points λ i ; the tristimulus values X R , Y R and Z R of the red pixel of the liquid crystal display system are calculated using the following formula;

[0048]

[0049] The normalized spectral power distribution S of the green pixel points of the liquid crystal display system G (λ) is a data set of the normalized spectral power distribution, including N wavelength points λ i and the corresponding normalized spectral power values S Gi ; the color matching function of the CIE 1931 XYZ color space is a data set of the spectral tristimulus values of the CIE 1931 standard colorimetric observer, including N wavelength points λ i and the corresponding tristimulus values (X i , Y i , Z i ); the tristimulus values X G , Y G and Z G of the green pixel points of the liquid crystal display system are calculated using the following formula;

[0050]

[0051] The normalized spectral power distribution S B (λ) of the blue pixel points of the liquid crystal display system is a data set of the normalized spectral power distribution, including N wavelength points λ i and the corresponding normalized spectral power values S Bi ; the color matching function of the CIE 1931 XYZ color space is a data set of the spectral tristimulus values of the CIE 1931 standard colorimetric observer, including N wavelength points λ i and the corresponding tristimulus values (X i , Y i , Z i ); the tristimulus values X B , Y B and Z B of the blue pixel points of the liquid crystal display system are calculated using the following formula;

[0052]

[0053]

[0054] The sum of the tristimulus values of the three primary color pixel points of the liquid crystal display system is used as the tristimulus values X W , Y W and Z W of the original white pixel point of the liquid crystal display system:

[0055] X W = X R + X G + X B

[0056] Y W = YR +Y G +Y B

[0057] Z W = Z R +Z G +Z B

[0058] Assume that the column vector of the tristimulus channel values of the pixel points of any color in the liquid crystal display system at the target color temperature in the target RGB color space is The column vector of the tristimulus values of the pixel points of any color in the liquid crystal display system in the CIE 1931 XYZ color space is If the color space conversion matrix from the target RGB color space to the CIE 1931 XYZ color space is M, then:

[0059]

[0060] In an exemplary embodiment, the color space conversion matrix M can be determined using the following formula 2_1;

[0061]

[0062] where (x R , y R ), (x G , y G ) and (x B , y B ) are the chromaticity coordinate values of red, green, and blue in the target RGB color space in the CIE 1931 chromaticity diagram; L R , L G and L B are the correction parameters for red, green, and blue respectively.

[0063] In an exemplary embodiment, using the inverse matrix of the color space conversion matrix to convert the tristimulus values of the original white pixel points in the CIE 1931 XYZ color space of the liquid crystal display system into the tristimulus channel values of the target white pixel points at the target color temperature in the target RGB color space, includes:

[0064] Calculating the value of the color space conversion matrix M according to the three primary colors in the target RGB color space and the chromaticity coordinates of white at the target color temperature in the CIE 1931 chromaticity diagram;

[0065] Performing an inverse operation on the color space conversion matrix M to obtain the inverse matrix M -1 ;

[0066] Multiplying the inverse matrix M of the color space conversion matrix by-1 Multiply with the column vector of the tristimulus values of the original white pixel points in the CIE 1931 XYZ color space of the liquid crystal display system to obtain the column vector of the primary color channel values of the target white pixel points at the target color temperature in the target RGB color space.

[0067] In an exemplary embodiment, calculating the numerical values of the color space conversion matrix according to the primary colors in the target RGB color space and the chromaticity coordinates of white at the target color temperature in the CIE 1931 chromaticity diagram includes:

[0068] Obtain the chromaticity coordinate values of the primary colors in the target RGB color space and white at the target color temperature in the CIE 1931 chromaticity diagram: (x R , y R ), (x G , y G ), (x B , y B ) and (x W , y W );

[0069] Normalize the Y value of white at the target color temperature in the target RGB color space to 1 in the CIE 1931 XYZ color space, and substitute all the obtained chromaticity coordinate values into the following relational expression 3_1 to solve for the numerical values of the correction parameters L R , L G and L B ;

[0070]

[0071] Substitute all the obtained chromaticity coordinate values and the calculated numerical values of the correction parameters L R , L G and L B into the color space conversion matrix M to obtain all the numerical values of the color space conversion matrix M.

[0072] The column vector of the tristimulus values of the original white pixel points in the CIE 1931 XYZ color space of the liquid crystal display system is The column vector of the primary color channel values of the target white pixel points at the target color temperature in the target RGB color space of the liquid crystal display system is The column vector of the primary color channel values of the target white pixel points is determined by the following formula 4_1;

[0073]

[0074] In an exemplary embodiment, after obtaining the column vector of the primary color channel values of the target white pixel points at the target color temperature in the target RGB color space, the method further includes:

[0075] Normalize and integerize the tristimulus channel values of the target white pixel points at the target color temperature in the target RGB color space;

[0076] Among them, the normalization process is used to proportionally map each channel value in the tristimulus channel values to the interval [0, 1]; the integerization process is used to proportionally map each channel value in the normalized tristimulus channel values to the interval [0, 255] in the integer domain.

[0077] In an exemplary liquid crystal display system, assuming that the normalized tristimulus values of the original white point of the liquid crystal display system are: X W ' = 0.9505, Y W ' = 1, Z W ' = 1.089, the target RGB color space of the liquid crystal display system is the BT709 space, and the target color temperature is 9300K. By looking up the table, the chromaticity coordinate values of red, green, blue, and white at the target color temperature in the target RGB color space in the CIE1931 chromaticity diagram are as follows: x R = 0.64, y R = 0.33, x G = 0.3, y G = 0.6, x B = 0.15, y B = 0.06, x W = 0.285, y W = 0.293. After adopting the above color temperature correction method, it can be calculated that in order for the liquid crystal display system to meet the target color temperature of 9300K, the RGB channel values of the white pixel points need to be set to: R W = 254, G W = 255, B W = 255.

[0078] The following Table 2 provides the chromaticity coordinate values of the primary colors in several RGB color spaces in the CIE 1931 chromaticity diagram. The chromaticity coordinate values of the white in the RGB color space are related to the specific color temperature and are not listed in Table 2.

[0079]

[0080] Table 2

[0081] As Figure 3 shown, an embodiment of the present application provides a color temperature correction device for a liquid crystal display system, including: a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the steps of the above color temperature correction method for the liquid crystal display system are implemented.

[0082] An embodiment of the present application provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the color temperature correction method of the above liquid crystal display system are implemented.

[0083] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, and appropriate combinations thereof. In the hardware implementation, the division of the functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be executed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or be implemented as hardware, or be implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term "computer storage medium" includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassette, tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium generally includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium.

[0084] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include at least one such feature.

[0085] In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0086] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0087] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A color temperature correction method for a liquid crystal display system, comprising: Determining the tristimulus values ​​of the original white pixel of the liquid crystal display system in the CIE 1931XYZ color space according to the normalized spectral power distribution of the white light backlight source of the liquid crystal display system and the transmittance spectrum of the three primary color filters of the color film; Determine the target RGB color space and target color temperature to be satisfied by the liquid crystal display system, and construct a color space conversion matrix from the target RGB color space to the CIE 1931XYZ color space; The inverse matrix of the color space conversion matrix is ​​used to convert the tristimulus values ​​of the original white pixel point of the liquid crystal display system in the CIE 1931XYZ color space into the three primary color channel values ​​of the target white pixel point at the target color temperature in the target RGB color space; The liquid crystal display system is driven to display white according to the three primary color channel values ​​of the target white pixel point.

2. The method according to claim 1, characterized in that: Determining the tristimulus values ​​of the original white pixel point of the liquid crystal display system in the CIE 1931XYZ color space according to the normalized spectral power distribution of the white light backlight source of the liquid crystal display system and the transmittance spectrum of the three primary color filters of the color film, including: The product of the normalized spectral power distribution of the white light backlight source of the liquid crystal display system and the transmittance spectrum of each primary color filter of the color film is used as the normalized spectral power distribution of the corresponding primary color pixel point of the liquid crystal display system; Integrate the product of the normalized spectral power distribution of each primary color pixel of the liquid crystal display system and the color matching function of the CIE 1931XYZ color space within the visible light wavelength range of the human eye to obtain the tristimulus values ​​of the corresponding primary color pixel of the liquid crystal display system; The accumulated sum of the tristimulus values ​​of the three primary color pixel points of the liquid crystal display system is used as the tristimulus value of the original white pixel point of the liquid crystal display system.

3. The method according to claim 2, characterized in that: The normalized spectral power distribution S(λ) of any primary color pixel of the liquid crystal display system is a data set of normalized spectral power distribution, including N wavelength points λ i The corresponding normalized spectral power value S i ; The color matching function of the CIE 1931XYZ color space is a data set of CIE 1931 standard colorimetric observer spectrum tristimulus values, including N wavelength points λ i The corresponding tristimulus values ​​(X i ,Y i ,Z i ); Wherein, N is an integer greater than 1, and 1≤i≤N.

4. The method according to claim 3, characterized in that: The product of the normalized spectral power distribution of each primary color pixel of the liquid crystal display system and the color matching function of the CIE 1931XYZ color space is integrated and calculated within the visible light wavelength range of the human eye to obtain the tristimulus values ​​of the corresponding primary color pixel of the liquid crystal display system, including: The following formulas 1_1 to 1_3 are used to calculate the tristimulus values ​​X, Y, and Z of any primary color pixel of the liquid crystal display system; Wherein, Δλ is the wavelength interval between any two adjacent wavelength points, and the N wavelength points are arranged at equal intervals.

5. The method according to claim 1, characterized in that: The color space conversion matrix M is determined using the following formula 2_1: Among them, (x R ,y R )、(x G ,y G ) and (x B ,y B ) are the chromaticity coordinates of red, green and blue in the target RGB color space in the CIE1931 chromaticity diagram; L R , L G and L B are the correction parameters for red, green, and blue, respectively.

6. The method according to claim 5, characterized in that: The inverse matrix of the color space conversion matrix is ​​used to convert the tristimulus values ​​of the original white pixel point of the liquid crystal display system in the CIE 1931XYZ color space into the three primary color channel values ​​of the target white pixel point at the target color temperature in the target RGB color space, including: Calculating the value of the color space conversion matrix M according to the chromaticity coordinates of the three primary colors in the target RGB color space and the white color at the target color temperature in the CIE 1931 chromaticity diagram; Perform an inverse operation on the color space conversion matrix M to obtain the inverse matrix M of the color space conversion matrix -1 ; The inverse matrix M of the color space conversion matrix -1 The column vector of the three primary color channel values ​​of the target white pixel at the target color temperature in the target RGB color space is obtained by multiplying the column vector of the three primary color values ​​of the original white pixel of the liquid crystal display system in the CIE 1931XYZ color space.

7. The method according to claim 6, characterized in that: Calculating the value of the color space conversion matrix according to the chromaticity coordinates of the three primary colors in the target RGB color space and the white color at the target color temperature in the CIE 1931 chromaticity diagram includes: Get the chromaticity coordinates of the three primary colors in the target RGB color space and the white color at the target color temperature in the CIE 1931 chromaticity diagram: (x R ,y R )、(x G ,y G )、(x B ,y B ) and (x W ,y W ); Normalize the Y value of white at the target color temperature in the target RGB color space in the CIE 1931XYZ color space to 1, and substitute all the obtained chromaticity coordinate values ​​into the following relationship 3_1 to solve the correction parameter L R , L G and L B The value of All the chromaticity coordinate values ​​obtained and the calculated correction parameters L R , L G and L B Substitute the values ​​into the color space conversion matrix M to obtain all the values ​​of the color space conversion matrix M.

8. The method according to claim 6, characterized in that: After obtaining the column vector of the three primary color channel values ​​of the target white pixel point at the target color temperature in the target RGB color space, the method further includes: Normalizing and integerizing the three primary color channel values ​​of the target white pixel at the target color temperature in the target RGB color space; Among them, the normalization processing is used to map each channel value of the three primary color channel values ​​in proportion to the [0,1] interval; the integer processing is used to map each channel value of the normalized three primary color channel values ​​in proportion to the [0,255] interval of the integer domain.

9. A color temperature correction device for a liquid crystal display system, comprising: A memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the color temperature correction method of the liquid crystal display system described in any one of claims 1 to 8 are implemented.

10. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the steps of the color temperature correction method for a liquid crystal display system according to any one of claims 1 to 8 are implemented.

Images