Image conversion method and display equipment

Abstract

The invention discloses an image conversion method and display equipment, and the method comprises the steps: obtaining a target color, and determining a target color point of the target color in a chromaticity map; the chromaticity map comprises M primary color points, the M primary color points correspond to M primary colors, and M is an integer and is greater than or equal to 4; defining M driving components corresponding to the M primary colors, and a relation equation between the color coordinates of the target color point and the color coordinates of the primary color points; determining the value range of the driving components according to the relation equation, setting the first driving component as the maximum value, and / or setting the Mth driving component as the minimum value, and determining the values of the remaining M-1 driving components; the M primary colors comprise first to Mth primary colors; the wavelength of the first primary color is greater than at least partial wavelengths of the second primary color to the Mth primary color; the wavelength of the Mth primary color is smaller than at least part of the wavelengths of the first to (M-1) th primary colors. By adopting the scheme, the unique solution of the color synthesized by four or more primary colors can be realized, and the effect of removing blue light is realized.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to an image conversion method and a display device. Background Art

[0002] With the advancement of technology, people have higher and higher requirements on the color performance of monitors, hoping that the monitors can present richer and more saturated colors.

[0003] At present, at least one new primary color different from red, green and blue is usually added to the traditional three-primary color display to effectively enhance the color performance of the display. However, for a display with four or more primary colors, if a target color needs to be displayed, there are countless ways to synthesize the target color.

[0004] Therefore, how to determine the only solution to synthesize the color required for display has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The present invention provides an image conversion method and a display device to achieve a unique solution for synthesizing four or more primary colors, and on this basis, achieve the effect of removing blue light.

[0006] According to one aspect of the present invention, there is provided an image conversion method, comprising:

[0007] Obtain a target color, and determine a target color point of the target color in a chromaticity spectrum; wherein the chromaticity spectrum includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4;

[0008] Define the M driving components (D01, D02, . . . , D0M) corresponding to the M primary colors, and the relationship equation between the color coordinates (X0, Y0, Z0) of the target color point and the color coordinates (Xi, Yi, Zi) of each primary color point: (X0, Y0, Z0) = D01*(X1, Y1, Z1) + D02*(X2, Y2, Z2) + . . . + D0M*(XM, YM, ZM); wherein 1 ≤ i ≤ M, and i is an integer;

[0009] Determine a first value range of the first driving component D01 according to the relationship equation, set the first driving component D01 to the maximum value in the first value range, and then determine the values ​​of the remaining M-1 driving components; and / or determine an Mth value range of the Mth driving component D0M according to the relationship equation, set the Mth driving component D0M to the minimum value in the Mth value range, and then determine the values ​​of the remaining M-1 driving components;

[0010] Among them, the M primary colors include a first primary color, a second primary color,..., and an Mth primary color; the wavelength of the first primary color is greater than at least part of the wavelengths of the second to Mth primary colors; the wavelength of the Mth primary color is smaller than at least part of the wavelengths of the first to M-1th primary colors.

[0011] According to another aspect of the present invention, there is provided another image conversion method, comprising:

[0012] Obtain a target color, and determine a target color point of the target color in a chromaticity spectrum; wherein the chromaticity spectrum includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4; the chromaticity spectrum also includes E sub-areas divided by multiple primary color points, E is an integer, and E≥2; each sub-area at least partially does not overlap;

[0013] According to the positional relationship between the target color point and each sub-area, the primary colors required to form the target color corresponding to the target color point are determined, which are recorded as the first type of primary colors, and the other primary colors are recorded as the second type of primary colors;

[0014] Determine the driving components corresponding to the first-class primary colors according to the color coordinates of the target color point and the color coordinates of the primary color points of the first-class primary colors, and set the driving components corresponding to the second-class primary colors to zero;

[0015] Among them, the M primary colors include a first primary color, a second primary color,..., and an Mth primary color, and the wavelength of the Mth primary color is smaller than at least part of the wavelength of the first to M-1th primary colors; the sub-regions are divided by at least three and at most M-1 primary color points, and at least one sub-region is divided by multiple primary color points that do not include the Mth primary color point corresponding to the Mth primary color.

[0016] According to another aspect of the present invention, there is provided a display device, comprising: a plurality of pixel units; the pixel units include M primary color pixels, M is an integer, and M≥4;

[0017] The display mode of the display device includes a first display mode;

[0018] In the first display mode, in the same pixel unit, N primary color pixels are in a bright state, and MN primary color pixels are in a black state, where N is an integer and 3≤N<M;

[0019] In the first display mode, the light emission wavelength of at least some of the MN primary color pixels in the black state is at least smaller than the light emission wavelength of at least some of the N-1 primary color pixels in the bright state.

[0020] The technical solution of the present invention determines the value range of the driving component through the relationship equation between the color coordinates of the target color and the color coordinates of each primary color point, and takes the maximum value in the value range of some driving components, which is beneficial to reducing the linear combination of M primary colors to synthesize the target color, simplifying the calculation process, and then determining the unique solution of each driving component; in addition, when setting some driving components as the maximum value in their value range, by setting the first driving component D01 corresponding to the first primary color with the longest wavelength to the maximum value in the first value range, and / or setting the Mth driving component D0M corresponding to the Mth primary color with the shortest wavelength to the minimum value in the Mth value range, it is beneficial to increase the luminous flux of the primary colors with larger wavelengths and reduce the luminous flux of the primary colors with smaller wavelengths, thereby reducing the damage of short-wavelength light to the human eye.

[0021] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a flow chart of an image conversion method provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of a chromaticity spectrum provided by an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0026] Figure 4 is a flow chart of another image conversion method provided by an embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0028] Figure 6 is a flow chart of another image conversion method provided by an embodiment of the present invention;

[0029] Figure 7 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0030] Figure 8is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0031] Fig. 9 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0032] Fig.10 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0033] Fig.11 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0034] Fig.12 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0035] Fig.13 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0036] Fig.14 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0037] Fig.15 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0038] Fig.16 is a structural schematic diagram of an image conversion device provided by an embodiment of the present invention;

[0039] Fig.17 is a schematic diagram of a top view of a display device provided by an embodiment of the present invention;

[0040] Fig.18 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0041] Fig.19 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0042] Fig. 20 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0043] Fig.21 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0044] Fig. 22 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0045] Fig.23 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0046] Fig.24is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0047] Fig.25 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0048] Fig.26 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0049] Fig. 27 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0050] Fig.28 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0051] Fig.29 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0052] Fig.30 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0053] Fig.31 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0054] Fig.32 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0055] Fig.33 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention;

[0056] Fig.34 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0057] Fig.35 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0058] Fig.36 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention;

[0059] Fig.37 It is a schematic diagram of a top view structure of another display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0060] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0061] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0062] According to the background technology, traditional displays usually have three primary colors: red, green, and blue. The coordinates of the primary color points of the three primary colors in the chromaticity diagram (CIE chromaticity diagram) are (Xr, Yr), (Xg, Yg), and (Xb, Yb), respectively. According to the chromaticity formula X=x / (x+y+z), Y=y / (x+y+z), Z=z / (x+y+z), and X+Y+Z=1, the color coordinates of the three primary colors of red, green, and blue can be obtained as (Xr, Yr, Zr), (Xg, Yg, Zg), (Xb, Yb, Zb ); wherein, Xr represents the relative luminous flux related to red in the red primary color, Yr represents the relative luminous flux related to green in the red primary color, and Zr represents the relative luminous flux related to blue in the red primary color. The relative luminous flux (Xr, Yr, Zr) is the normalized value of the luminous flux of red, green and blue. Similarly, Xg, Yg and Zg represent the relative luminous flux related to red, green and blue in the green primary color, respectively, and Xb, Yb and Zb represent the relative luminous flux related to red, green and blue in the blue primary color, respectively.

[0063] It should be noted that the three colors red, green and blue are not equivalent to the three primary colors red, green and blue. The red primary color only represents one of the primary colors of the display, and the red primary color does not represent red. Red is a color, not a primary color; the red saturation in the red primary color may not be 100% (the red is not pure), and the red primary color may also contain a small amount of green and blue, but the red content is the largest; in an ideal state, when the red saturation in the red primary color is 100% (the red purity is very high), it can be approximately considered that Xr=1, Yr=Zr=0. Similarly, the green primary color only represents one of the primary colors of the display, and the green primary color does not represent green; the blue primary color only represents one of the primary colors of the display, and the blue primary color does not represent blue.

[0064] If you want to synthesize a target color, you can first obtain the target color point coordinates (X0, Y0) of the target color in the chromaticity spectrum. According to the chromaticity formula, you can get the color coordinates (X0, Y0, Z0). The relationship between the color coordinates of the target color and the color coordinates of each primary color is: (X0, Y0, Z0) = Dr*(Xr, Yr, Zr) + Dg*(Xg, Yg, Zg) + Db*(Xb, Yb, Zb); where X0, Y0, and Z0 represent the relative luminous fluxes related to the three colors of red, green, and blue in the target color, respectively. Dg and Db represent the driving components related to the three primary colors of red, green and blue in the target color respectively. The driving components are the relative luminous fluxes of the primary colors in the display, that is, the normalized values ​​of the luminous fluxes of the three primary colors of red, green and blue. The target color can be obtained by mixing the primary colors according to the driving components, that is, Dr*Xr+Dg*Xg+Db*Xb=X0, Dr*Yr+Dg*Yg+Db*Yb=Y0, Dr*Zr+Dg*Zg+Db*Zb=Z0, and the target color can be obtained. Dr, Dg and Db have a unique solution. For a three-primary color display, the unique linear combination of the red primary color, the green primary color and the blue primary color used to synthesize the target color can be determined through the unique solution of Dr, Dg and Db.

[0065] However, if it is a four-primary color display, assuming that the four-primary color display is a display in which a fourth primary color different from red, green and blue is added to the three primary colors of red, green and blue, the primary color point coordinates of the fourth primary color in the chromaticity spectrum are (X4, Y4), and the color coordinates (X4, Y4, Z4) can be obtained according to the chromaticity formula, and X4, Y4, and Z4 respectively represent the relative luminous fluxes related to the three colors of red, green and blue in the fourth primary color. The relationship between the color coordinates of the target color and the color coordinates of each primary color is: (X0, Y0, Z0) = Dr*(Xr, Yr, Zr) + Dg*(Xg, Yg, Zg) + Db*(Xb, Yb, Zb) + D04*(X4, Y4, Z4), and D04 represents the driving component of the fourth primary color in the target color. If you want to synthesize the target color, you need to make Dr*Xr+Dg*Xg+Db*Xb+D04*X4=X0, Dr*Yr+Dg*Yg+Db*Yb+D04*Y4=Y0, Dr*Zr+Dg*Zg+Db*Zb+D04*Z4=Z0. However, the three equations have four unknown driving components, and the driving components Dr, Dg, Db, and D04 have multiple solutions.

[0066] For a four-primary color display, Dr, Dg, Db, and D04 have multiple solutions. The red primary color, green primary color, blue primary color, and the fourth primary color can have countless linear combinations to synthesize the target color. Similarly, for displays with more than four primary colors, the driving components also have multiple solutions, and each primary color also has countless linear combinations to synthesize the target color. However, in actual applications, only one of the linear combinations can be used to display the target color. Therefore, how to determine the unique and better solution for each driving component is a technical problem that needs to be solved urgently.

[0067] To solve the above technical problems, an embodiment of the present invention provides an image conversion method, comprising: obtaining a target color, and determining a target color point of the target color in a chromaticity spectrum; wherein the chromaticity spectrum includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4; defining M driving components (D01, D02, . . . , D0M) corresponding to the M primary colors, and a relationship equation between the color coordinates (X0, Y0, Z0) of the target color point and the color coordinates (Xi, Yi, Zi) of each primary color point: (X0, Y0, Z0) = D01*(X1, Y1, Z1)+D02*(X2, Y2, Z2)+. . . +D0M*(XM, YM, ZM); wherein , 1≤i≤M, and i is an integer; determining a first value range of the first driving component D01 according to the relationship equation, and setting the first driving component D01 to the maximum value in the first value range, and then determining the values ​​of the remaining M-1 driving components; and / or determining the Mth value range of the Mth driving component D0M according to the relationship equation, and setting the Mth driving component D0M to the minimum value in the Mth value range, and then determining the values ​​of the remaining M-1 driving components; wherein the M primary colors include a first primary color, a second primary color,..., an Mth primary color; the wavelength of the first primary color is greater than at least part of the wavelengths from the second primary color to the Mth primary color; the wavelength of the Mth primary color is less than at least part of the wavelengths from the first primary color to the M-1th primary color.

[0068] By adopting the above technical solution, the value range of the driving component is determined through the relationship equation between the color coordinates of the target color and the color coordinates of each primary color point, and the maximum value is taken in the value range of some driving components, which is beneficial to reducing the linear combination of M primary colors to synthesize the target color, simplifying the calculation process, and then determining the unique solution of each driving component; in addition, when setting some driving components as the maximum value in their value range, by setting the first driving component D01 corresponding to the first primary color with the longest wavelength to the maximum value in the first value range, and / or setting the Mth driving component D0M corresponding to the Mth primary color with the shortest wavelength to the minimum value in the Mth value range, it is beneficial to increase the luminous flux of the primary colors with larger wavelengths and reduce the luminous flux of the primary colors with smaller wavelengths, thereby reducing the damage of short-wavelength light to the human eye.

[0069] The above is the core idea of ​​the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0070] Figure 1 is a flowchart of an image conversion method provided by an embodiment of the present invention, referring to Figure 1 , the image conversion methods include:

[0071] 1001. Obtain a target color, and determine a target color point of the target color in a chromaticity spectrum; wherein the chromaticity spectrum includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4.

[0072] Among them, the M primary color points correspond to the M primary colors of the display, that is, M primary color pixels, and each primary color pixel can emit light of one primary color. The M primary colors can include monochromatic primary colors, such as red (R), yellow (Y), green (G), cyan (C), blue (B) and other primary colors, and the M primary colors can also include mixed color primary colors, such as white (W) primary color. For monochromatic primary colors, their wavelength can be a specific wavelength value, or a wavelength range, and the wavelengths of different monochromatic primary colors at least partially do not overlap; for mixed color primary colors, their wavelengths are multiple specific wavelength values, or one or more wavelength ranges, and the wavelength of the mixed color primary color can overlap with the wavelengths of other monochromatic primary colors.

[0073] In an optional embodiment, the wavelength of the primary color may be the peak wavelength or peak wavelength of the luminous spectrum of the corresponding primary color pixel, wherein the monochromatic primary color may include at least one peak wavelength and / or at least one peak wavelength, and the mixed primary color may include multiple peak wavelengths or peak wavelengths; in another optional embodiment, the wavelength of the primary color may also be a wavelength range in the luminous spectrum of the corresponding primary color pixel that is greater than a preset brightness threshold, or a wavelength range that is greater than a preset percentage of the maximum brightness amplitude; in another optional embodiment, the wavelengths of different monochromatic primary colors do not overlap.

[0074] The M primary colors include a first primary color, a second primary color, ..., and an Mth primary color. The wavelength of the first primary color is greater than at least part of the wavelengths of the second to Mth primary colors, and the wavelength of the Mth primary color is less than at least part of the wavelengths of the first to M-1th primary colors, that is, the first primary color is a monochromatic primary color with the largest wavelength among all primary colors, and the Mth primary color is a monochromatic primary color with the smallest wavelength among all primary colors. In an optional embodiment, the first primary color is a red primary color, and the Mth primary color is a blue primary color; the wavelength of the red primary color may be greater than the wavelengths of all other monochromatic primary colors, and greater than at least part of the wavelength of the mixed primary colors; the wavelength of the blue primary color may be less than the wavelengths of all other monochromatic primary colors, and less than at least part of the wavelength of the mixed primary colors.

[0075] 1002. Define M driving components (D01, D02, .. . , D0M) corresponding to M primary colors, and the relationship equation between the color coordinates of the target color point (X0, Y0, Z0) and the color coordinates of each primary color point (Xi, Yi, Zi): (X0, Y0, Z0) = D01*(X1, Y1, Z1) + D02*(X2, Y2, Z2) + .. . + D0M*(XM, YM, ZM); wherein 1≤i≤M, and i is an integer.

[0076] Among them, the color coordinates (X0, Y0, Z0) of the target color point can represent the target color, and X0, Y0, and Z0 respectively represent the relative luminous fluxes related to the three colors of red, green, and blue in the target color; (Xi, Yi, Zi) are the color coordinates of the i-th primary color point, and Xi, Yi, and Zi respectively represent the relative luminous fluxes related to the three colors of red, green, and blue in the i-th primary color; Di is the driving component of the i-th primary color, 1≤i≤M, and i is an integer. The driving component Di refers to the relative luminous flux corresponding to the i-th primary color, and can also be the relative brightness of the primary color pixel corresponding to the i-th primary color. When the driving component Di corresponding to the i-th primary color is zero, it means that the relative luminous flux of the i-th primary color is zero, that is, the primary color pixel corresponding to the i-th primary color does not emit light.

[0077] It should be noted that the driving component and the driving voltage are different definitions, please be careful not to confuse them. Among them, for the same primary color and its corresponding primary color pixel, the driving component refers to the relative luminous flux corresponding to the primary color, or it can be the relative brightness of the primary color pixel corresponding to the primary color; the driving voltage refers to the voltage required for the primary color pixel to work, and the primary color pixel can display the corresponding grayscale according to the driving voltage, that is, the corresponding brightness. For the same primary color and its corresponding primary color pixel, when the driving component is zero, the primary color pixel does not emit light, but it does not mean that the driving voltage is zero. Of course, the driving voltage can also be zero, without limitation, that is, when the driving component is zero, the driving voltage can be any value within a reasonable range of values; when the driving voltage is zero, it does not mean that the primary color pixel does not emit light. The primary color pixel can emit light or not, and there is no limitation, that is, when the driving voltage is zero, the driving component can also be any value within a reasonable range of values.

[0078] 1003. Determine a first value range of the first driving component D01 according to the relationship equation, set the first driving component D01 to the maximum value in the first value range, and then determine the values ​​of the remaining M-1 driving components; and / or, determine the Mth value range of the Mth driving component D0M according to the relationship equation, set the Mth driving component D0M to the minimum value in the Mth value range, and then determine the values ​​of the remaining M-1 driving components.

[0079] Specifically, M≥4. From the relationship equation between the color coordinates of the target color and the color coordinates of each primary color (X0, Y0, Z0)=D01*(X1, Y1, Z1)+D02*(X2, Y2, Z2)+···+D0M*(XM, YM, ZM), we can know that D01*X1+D02*X2+···+D0M*XM=X0, D01*Y1+D02*Y2+···+D0M*YM=Y0, D01*Z1+D02*Z2+···+D0M*ZM=Z0, D 01, D02, ···, D0M have multiple solutions; and since each driving component is the normalized value of the luminous flux of each primary color, the driving component corresponding to each primary color is greater than or equal to zero and less than or equal to 1, and the sum of the driving components corresponding to all primary colors is 1, that is, 0≤Di≤1; D01+···+D0M=1; 1≤i≤M, and i is an integer. Combined with the relationship equation between the color coordinates of the target color and the color coordinates of each primary color, the value range of each driving component can be determined, or the value range of at least part of the driving components can be determined. For example, at least the first value range of the first driving component D01 and / or the Mth value range of the Mth driving component D0M can be determined, so that the first driving component D01 and / or the Mth driving component D0M can be determined according to the maximum value in the value range. On the one hand, it is beneficial to reduce the linear combination of the M primary colors to synthesize the target color, simplify the calculation process, and then determine the unique solution of D01, D02,..., D0M; on the other hand, whether the first driving component D01 is set to the maximum value in the first value range or the Mth driving component D0M is set to the minimum value in the Mth value range, it is beneficial to increase the luminous flux of the primary colors with larger wavelengths and reduce the luminous flux of the primary colors with smaller wavelengths, thereby reducing the damage of short-wavelength light to the human eye.

[0080] Exemplarily, the target color can be obtained by obtaining the input signal of the target color and converting the input signal into the corresponding RGB brightness input value respectively; then, according to the RGB brightness input value, the target color corresponding to the input signal and the color coordinates (X0, Y0, Z0) of the target color are determined. After the color coordinates (X0, Y0, Z0) of the target color are obtained, the relationship equation can be defined according to the color coordinates (Xi, Yi, Zi) of each primary color point stored in advance, and the value range of the driving component Di corresponding to each primary color point can be determined. When M=4, by determining the first driving component D01 as the maximum value in its value range and / or the fourth driving component D04 as the minimum value in its value range, the remaining three driving components can have a unique solution, thereby determining the unique solution of each driving component. After that, the brightness output value of each primary color can be determined according to each driving component and the preset brightness parameter. Among them, the brightness parameter can be predetermined according to actual needs. In the specific implementation, the brightness output value of each primary color can be adjusted by changing the size of the brightness parameter, so as to obtain the preset brightness of the target color.

[0081] In addition, when M≥5, after determining that the first driving component D01 is the maximum value in its value range and / or the fourth driving component D04 is the minimum value in its value range, it is possible to continue to determine the maximum values ​​of other driving components in their value ranges until three driving components remain; then, based on the relationship equation between the color coordinates (X0, Y0, Z0) of the target color and the color coordinates (Xi, Yi, Zi) of each primary color point and the values ​​of the determined driving components, a unique solution for the remaining three driving components can be determined, thereby determining a unique solution for each driving component.

[0082] In the embodiment of the present invention, four or more primary colors are set, which is conducive to increasing the synthetic color gamut and realizing more colors, thereby providing rich color expression and presenting more bright and vivid colors; the value range of the driving component is determined by the relationship equation between the color coordinates of the target color and the color coordinates of each primary color point, and the maximum value is taken in the value range of some driving components, which is conducive to reducing the linear combination of M (M>3) primary colors to synthesize the target color, simplifying the calculation process, and then determining the unique solution of each driving component; in addition, when setting some driving components as the maximum value in their value range, by setting the first driving component D01 corresponding to the first primary color with the longest wavelength to the maximum value in the first value range, and / or setting the Mth driving component D0M corresponding to the Mth primary color with the shortest wavelength to the minimum value in the Mth value range, it is conducive to increasing the luminous flux of the primary color with a larger wavelength and reducing the luminous flux of the primary color with a smaller wavelength, thereby reducing the damage of short-wavelength light to the human eye.

[0083] Optionally, the target color point includes a first target color point; when the target color point is the first target color point, the Mth driving component D0M=0.

[0084] Among them, the M primary color points in the chromaticity spectrum can form multiple sub-areas, and the sub-areas are divided by at least three and at most M-1 primary color points; the sub-area surrounded by multiple primary color points excluding the Mth primary color point corresponding to the Mth primary color is the first target area, and the first target color point can be any color point located in the first target area.

[0085] For example, taking M=4 as an example, Figure 2 is a schematic diagram of a chromaticity spectrum provided by an embodiment of the present invention, with reference to Figure 2The chromaticity spectrum includes four primary color points of red (R), green (G), cyan (C), and blue (B). The fourth primary color is the B primary color, and the fourth driving component D04 is the driving component of the B primary color. The RGCB area surrounded by the four primary color points of R, G, C, and B is the color gamut of the colors that can be synthesized by the four primary colors of R, G, C, and B. Any target color in the color gamut can be synthesized by one or more of the four primary colors of R, G, C, and B. For example, the color on the line connecting the R and C primary color points can be synthesized by the R and C primary colors, and the color in the RGC area surrounded by the R, G, and C primary color points can be synthesized by the R, G, and C primary colors. The RGC area is the first target area, and the first target color point A can be any color point located in the RGC area. When the target color point is the first target color point A, the fourth driving component D04 of the B primary color can be set to zero, and the target color corresponding to the target color point can be synthesized only by the R, G, and C primary colors, and the three driving components corresponding to the R, G, and C primary colors have a unique solution; when synthesizing the target color, the fourth driving component D04 of the B primary color is zero, that is, the relative luminous flux of the B primary color is zero, and the B primary color pixels in the display can not emit light.

[0086] Take M=5 as an example, Figure 3 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Figure 3 , the chromaticity spectrum includes five primary color points of red (R), yellow (Y), green (G), cyan (C), and blue (B), the fifth primary color is the B primary color, and the fifth driving component D05 is the driving component of the B primary color. The RYC region, the RGC region, the RYC region, the YGC region, and the RYGC region are all first target regions, the first target color point A can be any color point located in the RYG region, the RGC region, the YGC region, and the RYGC region, when the target color point is the first target color point A, the fifth driving component D05 of the B primary color can be set to zero, the target color corresponding to the target color point can be synthesized by at least part of the primary colors of R, Y, G, and C primary colors, and the four driving components corresponding to the R, Y, G, and C primary colors can have multiple solutions; however, no matter what solution the four driving components corresponding to the R, Y, G, and C primary colors are, when synthesizing the target color, the fifth driving component D05 of B is zero, that is, the relative luminous flux of the B primary color is zero, and the B primary color pixels in the display do not emit light.

[0087] In this way, when synthesizing rich target colors, the target color points corresponding to at least some of the target colors are located in the first target area, that is, at least the target color points corresponding to the target colors are the first target color points. At this time, the synthesized target color can use the Mth primary color with the shortest wavelength, and correspondingly, the Mth primary color pixel with the shortest wavelength in the display can be made non-luminous. The Mth primary color with the shortest wavelength in the display is usually the blue primary color. In this way, the blue light can be effectively reduced, and the effect of removing blue light can be achieved, thereby reducing the damage of blue light to the human eye.

[0088] It can be seen from the above content that for M primary colors, if a target color is to be synthesized, there are M unknown driving components. The above image conversion method can be used to determine the first driving component D01 or the Mth driving component D0M. For the case of M=4, after determining the first driving component M1 or the Mth driving component D0M, there are still three unknown driving components remaining. At this time, the remaining three driving components can have a unique solution, so that the unique solution of D01, D02,..., D0M can be determined; for the case of M≥5, after determining the first driving component M1 or the Mth driving component D0M, there are still M-1 unknown driving components remaining, M-1 is greater than three, and the remaining M-1 driving components have multiple solutions. For the remaining M-1 driving components, the unique solution can also be determined by continuing to determine the maximum value in its value range, but the specific determination method is not limited.

[0089] In an optional embodiment, M≥5; determining a first value range of the first driving component D01 according to the relationship equation, setting the first driving component D01 to a maximum value in the first value range, and then determining values ​​of the remaining M-1 driving components, includes: determining a first value range of the first driving component D01 according to the relationship equation, and setting the first driving component D01 to a maximum value in the first value range; similarly, setting values ​​of the remaining driving components in order from small to large in numerical order until three driving components remain; determining the remaining three driving components according to the relationship equation and the values ​​of the set driving components;

[0090] Alternatively, the Mth value range of the Mth driving component D0M is determined according to the relationship equation, and the Mth driving component D0M is set to the minimum value in the Mth value range, and then the values ​​of the remaining M-1 driving components are determined, including: determining the Mth value range of the Mth driving component D0M according to the relationship equation, and setting the Mth driving component D0M to the minimum value in the Mth value range; similarly, setting the values ​​of the remaining driving components in descending order according to the numbering sequence until three driving components remain; determining the remaining three driving components according to the relationship equation and the values ​​of the set driving components.

[0091] Exemplarily, in order of numbering, from small to large, the wavelengths of the primary colors corresponding to the driving components D01, D02,..., D0M decrease successively, the first driving component D01 corresponds to the first primary color, and the wavelength of the first primary color is greater than the wavelengths of other primary colors, the second driving component D02 corresponds to the second primary color, and the wavelength of the first primary color is greater than the wavelengths of the third to M-th primary colors, the third driving component D03 corresponds to the third primary color, and the wavelength of the third primary color is greater than the wavelengths of the fourth to M-th primary colors,...; when M=5, the first to M-th primary colors can be red (R), yellow (Y), green (G), cyan (C), and blue (B) primary colors, respectively.

[0092] According to the relationship equation between the color coordinates of the target color and the color coordinates of each primary color point, the value range of the first driving component D01 corresponding to the R primary color can be determined, and the first driving component D01 can be set to take the maximum value; according to the relationship equation and the first driving component D01, the value range of the second driving component D02 corresponding to the Y primary color can be determined, and the second driving component D02 can be set to take the maximum value. At this time, there are still three driving components (D03, D04, D05) corresponding to the G, C, and B primary colors remaining, and the remaining three driving components (D03, D04, D05) have a unique solution, so the unique solution of D01, D02, D03, D04, and D05 can be determined.

[0093] Alternatively, according to the relationship equation between the color coordinates of the target color and the color coordinates of each primary color point, the value range of the fifth driving component D05 corresponding to the B primary color can be determined, and the fifth driving component D05 is set to take the minimum value; according to the relationship equation and the fifth driving component D05, the value range of the fourth driving component D04 corresponding to the C primary color can be determined, and the fourth driving component D04 is set to take the minimum value. At this time, there are still three driving components (D01, D02, D03) corresponding to the R, Y, and G primary colors remaining, and the remaining three driving components (D01, D02, D03) have a unique solution, so the unique solution of D01, D02, D03, D04, and D05 can be determined.

[0094] By sequentially setting the driving components corresponding to the primary colors with larger wavelengths as the maximum values ​​in the value range, or sequentially setting the driving components corresponding to the primary colors with smaller wavelengths as the minimum values ​​in the value range, until three unknown driving components remain, the remaining three unknown driving components can have a unique solution, thereby determining the unique solutions of the driving components D01, D02, . . . , D0M, which is beneficial to increasing the relative luminous flux of the primary colors with larger wavelengths that are less harmful to the human eye, reducing the relative luminous flux of the primary colors with smaller wavelengths that are less harmful to the human eye, achieving the effect of removing blue light, and thus effectively reducing damage to the human eye.

[0095] In another optional embodiment, M=5; determining a first value range of the first driving component D01 according to the relationship equation, and setting the first driving component D01 to the maximum value in the first value range, and then determining the values ​​of the remaining M-1 driving components, including: determining a first value range of the first driving component D01 according to the relationship equation, and setting the first driving component D01 to the maximum value in the first value range; determining a fifth value range of the fifth driving component D05 according to the relationship equation and the first driving component D01, and setting the fifth driving component D05 to the minimum value in the fifth value range; determining the remaining three driving components according to the relationship equation, the first driving component D01 and the fifth driving component D05;

[0096] And / or, determining the Mth value range of the Mth driving component D0M according to the relationship equation, and setting the Mth driving component D0M to the minimum value in the Mth value range, and then determining the values ​​of the remaining M-1 driving components, including: determining the fifth value range of the fifth driving component D05 according to the relationship equation, and setting the fifth driving component D05 to the minimum value in the fifth value range; determining the first value range of the first driving component D01 according to the relationship equation and the fifth driving component D05, and setting the first driving component D01 to the maximum value in the first value range; determining the remaining three driving components according to the relationship equation, the first driving component D01 and the fifth driving component D05.

[0097] Specifically, the first driving component D01 corresponds to the first primary color, and the wavelength of the first primary color is greater than at least part of the wavelengths of other primary colors. The fifth driving component D05 corresponds to the fifth primary color, and the wavelength of the fifth primary color is less than at least part of the wavelengths of other primary colors. In an optional embodiment, the first primary color can be a red primary color, and the fifth primary color can be a blue primary color. In the process of determining the unique solution of the driving components D01, D02, D03, D04, and D05, by determining the first driving component D01 as the maximum value in the first value range, and the fifth driving component D05 as the minimum value in the fifth value range, the remaining three driving components (D02, D03, and D04) have a unique solution. In this way, the relative luminous flux of the primary colors with large wavelengths that are less harmful to the human eye can also be increased, and the relative luminous flux of the primary colors with small wavelengths that are less harmful to the human eye can be reduced, so as to achieve the effect of removing blue light, thereby effectively reducing the damage to the human eye.

[0098] In another optional embodiment, M≥5; determining the Mth value range of the Mth driving component D0M according to the relationship equation, and setting the Mth driving component D0M to the minimum value in the Mth value range, and then determining the values ​​of the remaining M-1 driving components, including: determining the Mth value range of the Mth driving component D0M according to the relationship equation, and setting the Mth driving component D0M to the minimum value in the Mth value range; determining the first value range of the first driving component D01 according to the relationship equation and the Mth driving component D0M, and setting the first driving component D01 to the minimum value in the first value range; determining the remaining M-2 driving components according to the relationship equation, the first driving component D01 and the Mth driving component D0M.

[0099] Exemplarily, the first driving component D01 corresponds to the first primary color, which may be a red primary color; the Mth driving component D0M corresponds to the Mth primary color, which may be a blue primary color. When M=5, after the fifth driving component D05 is the minimum value in the fifth value range and the first driving component D01 is determined to be the minimum value in the first value range, three unknown driving components remain, and the remaining three driving components may have a unique solution; when M>5, after the fifth driving component D05 is the minimum value in the fifth value range and the first driving component D01 is determined to be the minimum value in the first value range, M-2 unknown driving components remain, M-2 is greater than three, and the remaining M-2 driving components have multiple solutions. Among the remaining M-2 driving components, the driving component corresponding to the large wavelength primary color may continue to be set as the maximum value in its value range, and / or the driving component corresponding to the small wavelength primary color may be set as the minimum value in its value range, thereby determining the unique solution of the driving component.

[0100] Generally, the primary color pixels corresponding to the primary colors with shorter wavelengths have higher luminous efficiency and are more harmful to the human eye; the primary colors with longer wavelengths have lower luminous efficiency and are less harmful to the human eye. By setting the driving component of the primary color with the shortest wavelength to the minimum value in the value range, and also setting the driving component of the primary color with the lowest luminous efficiency to the minimum value in the value range, the luminous flux of the primary colors with short wavelengths can be reduced while also reducing the luminous flux of the primary colors with lower luminous efficiency. In this way, while reducing damage to the human eye, it is also beneficial to low power consumption.

[0101] Based on the same inventive concept, Figure 4 is a flowchart of another image conversion method provided by an embodiment of the present invention, referring to Figure 4 , the image conversion methods include:

[0102] S2001. Obtain a target color and determine a target color point of the target color in a chromaticity spectrum; wherein the chromaticity spectrum includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4; the chromaticity spectrum also includes E sub-areas divided by multiple primary color points, E is an integer, and E≥2.

[0103] Among them, the M primary color points correspond to the M primary colors of the display, that is, M primary color pixels, and each primary color pixel can emit light of one primary color. The M primary colors include a first primary color, a second primary color, ..., an Mth primary color, and the wavelength of the Mth primary color is smaller than at least part of the wavelengths of the first primary color to the M-1th primary color. In an optional embodiment, the Mth primary color can be a blue primary color.

[0104] The sub-regions are divided by at least three and at most M-1 primary color points, and at least one sub-region is divided by multiple primary color points excluding the Mth primary color point corresponding to the Mth primary color. For different sub-regions, the number of primary color points used for division can be the same or different, and the present invention is not limited thereto. In addition, each sub-region is at least partially non-overlapping, that is, among the multiple primary color points that divide different sub-regions, at least one primary color point is different. In an optional embodiment, the edges of adjacent sub-regions may overlap, but the areas within the edges may not overlap. In another optional embodiment, the combination of all sub-regions may cover the maximum area surrounded by all primary color points.

[0105] S2002. According to the positional relationship between the target color point and each sub-region, the primary colors required to form the target color corresponding to the target color point are determined, which are recorded as first-class primary colors, and the other primary colors are recorded as second-class primary colors.

[0106] The first type of primary colors refers to the primary colors required for synthesizing the target color, and the first type of primary colors is also the primary colors required for dividing the same sub-region. As the sub-region can be divided by at least three and at most M-1 primary color points, it can be known that the first type of primary colors may include at least three and at most M-1 primary colors. In an optional embodiment, the first type of primary colors includes N primary colors, and the second type of primary colors includes MN primary colors, that is, N primary colors can be the first type of primary colors, MN primary colors can be the second type of primary colors, and N is an integer greater than 3 and less than M.

[0107] Specifically, the sub-region where the target color point is located can be determined based on the color coordinates of the target color point and the color coordinates of each primary color point, and the primary colors corresponding to the multiple primary color points dividing the sub-region are determined to be the primary colors required to synthesize the target color, that is, the primary colors corresponding to the multiple primary color points dividing the sub-region are recorded as first-category primary colors, and the other primary colors are recorded as second-category primary colors.

[0108] S2003 , determining driving components corresponding to the first-class primary colors according to the color coordinates of the target color point and the color coordinates of the primary color points of the first-class primary colors, and setting the driving components corresponding to the second-class primary colors to zero.

[0109] Specifically, the driving components corresponding to each first-class primary color and the relationship equation between the color coordinates of the target color point and the color coordinates of each first-class primary color are defined. According to the relationship equation, the driving components corresponding to each first-class primary color can be determined. At the same time, the driving components corresponding to the second-class primary colors are set to zero, and then the unique solution of the driving components D01, D02,..., D0M corresponding to all primary colors can be determined.

[0110] Exemplarily, the first type of primary colors includes N primary colors, where N is an integer greater than 3 and less than M. When M=4, N=3, the first type of primary colors includes three primary colors, and according to the relationship equation between the color coordinates of the target color point and the color coordinates of each first type of primary color, a unique solution of the driving component corresponding to each first type of primary color can be determined, and the other primary colors are all second type of primary colors, that is, the driving components corresponding to the other primary colors are all zero, and then the unique solution of the driving components corresponding to all the primary colors can be determined.

[0111] When M=5, N=3 and / or 4. If N=3, the driving component corresponding to each first-class primary color has a unique solution; if N=4, the driving component corresponding to each first-class primary color has multiple solutions. The unique solution of the driving component corresponding to each first-class primary color can be determined by setting the driving component of the first-class primary color corresponding to the larger wavelength as the maximum value in its value range, and / or setting the driving component of the first-class primary color corresponding to the smaller wavelength as the minimum value in its value range.

[0112] Furthermore, since at least part of the sub-areas are divided by a plurality of primary color points excluding the Mth primary color point corresponding to the Mth primary color, it can be seen that when synthesizing rich target colors, the primary colors required to synthesize at least part of the target colors do not include the Mth primary color. At this time, the Mth primary color is a second-class primary color, and its corresponding driving component is zero, that is, the luminous flux corresponding to the Mth primary color is zero, and the Mth primary color pixel with the shortest luminous wavelength in the display can be caused to not emit light.

[0113] In the embodiments of the present invention, four or more primary colors are set to increase the color gamut and realize more colors, thereby providing rich color expression and presenting brighter and more vivid colors. In addition, by dividing the chromaticity spectrum into multiple sub-areas, and each sub-area is divided by multiple primary color points, the multiple primary colors required to form the target color can be determined according to the area where the target color point is located, and the driving components of other primary colors are made zero, thereby simplifying the calculation process and determining the unique solution of each driving component. In addition, at least part of the sub-areas are divided by multiple primary color points that do not include the Mth primary color point, so that the formation of part of the target color does not require the Mth primary color, that is, the luminous flux of the Mth primary color with the shortest wavelength is zero. The Mth primary color with the shortest wavelength in the display is usually the blue primary color. In this way, the blue light can be effectively reduced to achieve the effect of removing blue light, thereby reducing the damage of blue light to the human eye.

[0114] Optionally, the primary color points of the chromaticity spectrum include at least a red (R) primary color point, a green (G) primary color point, and a blue (B) primary color point; at least one of the M primary color points of the chromaticity spectrum is located outside the RGB area divided by the R, G, and B primary color points in the chromaticity spectrum.

[0115] For example, Figure 5 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Figure 5In addition to the R, G, B primary color points, the M primary color points of the chromaticity spectrum may also include a yellow (Y) primary color point and / or a cyan (C) primary color point. Taking M=5 as an example, the chromaticity spectrum may include five primary color points, R, Y, G, C, and B, and both the Y and C primary color points may be located outside the RGB area divided by the R, G, and B primary color points. The area of ​​the RYGCB area divided by the five primary color points R, Y, G, C, and B covers and is larger than the area of ​​the RGB area. In this way, compared with the conventional R, G, and B primary colors, when at least one color corresponding to a primary color point located outside the RGB area is added in addition to the R, G, and B primary colors, the color gamut can be effectively increased, more colors can be achieved, and rich color expression can be provided.

[0116] It should be noted that in other optional embodiments, in addition to the R, G, B primary color points, at least some of the primary color points of the chromaticity spectrum may also be located within the RGB area. For example, the chromaticity spectrum may also include a W primary color point, and the W primary color point may be located within the RGB area.

[0117] Optionally, the primary color points of the chromaticity spectrum include at least a red (R) primary color point, a green (G) primary color point, and a blue (B) primary color point; the R, G, B primary color points correspond to R, G, B primary colors, respectively, and the wavelengths of the R, G, B primary colors decrease successively; in addition to the R, G, B primary color points, the M primary color points of the chromaticity spectrum also include at least one newly added primary color point; the wavelength of the newly added primary color corresponding to the at least one newly added primary color point is between the wavelength of the G primary color and the wavelength of the B primary color.

[0118] Specifically, the newly added primary color point can be divided into a sub-region with the primary color points other than the B primary color point, and the sub-region is divided by multiple primary color points excluding the B primary color point, so that the formation of some target colors does not require the B primary color. In other words, when synthesizing some target colors, the newly added primary color point can be used to replace the B primary color. The wavelength of the newly added primary color is between the wavelength of the G primary color and the wavelength of the B primary color. On the one hand, it is beneficial to increase the area of ​​the sub-region divided by the newly added primary color point and the R and G primary color points, so that when synthesizing more target colors, the driving component corresponding to the B primary color is controlled to be zero, so as to enhance the blue light removal effect and further reduce the damage to the human eye; on the other hand, in practical applications, the luminescent material emitting light between the G and B wavelengths has better optical properties, higher tolerance to material defects, lower preparation requirements, and is easier to prepare. In addition, the luminous efficiency of the luminescent device emitting light between the G and B wavelengths is also higher. Compared with the use of newly added primary colors in other bands, the use of newly added primary color points with wavelengths between the G and B wavelengths to replace the B primary color is more conducive to low power consumption.

[0119] In an optional implementation, in addition to the R, G, and B primary color points, the newly added primary color point may be a cyan (C) primary color point; the C primary color point corresponds to the C primary color; the wavelength of the C primary color is between the wavelength of the G primary color and the wavelength of the B primary color.

[0120] Optional, Figure 6 is a flowchart of another image conversion method provided by an embodiment of the present invention, referring to Figure 6 , the image conversion methods include:

[0121] S3001. Obtain a target color and determine a target color point of the target color in a chromaticity spectrum; wherein the chromaticity spectrum includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4; the chromaticity spectrum also includes E sub-areas divided by three primary color points, E is an integer, and E≥2.

[0122] S3002. Determine three primary colors required to form a target color corresponding to the target color point according to a positional relationship between the target color point and each sub-region, and record the three primary colors as first-class primary colors, and record the other primary colors as second-class primary colors.

[0123] S3003 , determining the driving components corresponding to the first-class primary colors according to the color coordinates of the target color point and the color coordinates of the primary color points of the first-class primary colors, and setting the driving components corresponding to the second-class primary colors to zero.

[0124] The sub-areas are divided by three primary color points, and the first type of primary colors includes three primary colors.

[0125] Specifically, the sub-region where the target color point is located can be determined based on the color coordinates of the target color point and the color coordinates of each primary color point, and the three first-class primary colors required for synthesizing the target color can be determined based on the sub-region. According to the relationship equation between the color coordinates of the target color point and the color coordinates of the three first-class primary colors, the unique solution of the driving component corresponding to each first-class primary color can be determined; at the same time, the M-3 driving components corresponding to the other M-3 primary colors are set to zero, and then the unique solution of the driving components corresponding to all primary colors can be determined. In this way, it is conducive to simplifying the calculation process of determining the unique solution, and more sub-regions can be divided by three primary color points that do not include the Mth primary color point, which is conducive to achieving that when synthesizing more target colors, the driving component corresponding to the Mth primary color is controlled to be zero, so as to enhance the blue light removal effect and further reduce damage to the human eye.

[0126] In an optional embodiment, Figure 7 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Figure 7, M=4, E=2; the chromaticity spectrum includes a red (R) primary color point, a green (G) primary color point, a cyan (C) primary color point, and a blue (B) primary color point, and the wavelengths of the R, G, C, B primary colors corresponding to the R, G, C, B primary color points decrease successively; the sub-areas of the chromaticity spectrum include an RGC area divided by the R, G, C primary color points and an RCB area divided by the R, C, B primary color points.

[0127] Exemplarily, when the target color point of the target color is located in the RGC area, the R, G, and C primary colors may be the first type of primary colors, the B primary color may be the second type of primary color, the driving components corresponding to the R, G, and C primary colors have a unique solution, and the driving component corresponding to the B primary color is zero; when the target color point of the target color is located in the RCB area, the R, C, and B primary colors may be the first type of primary colors, the G primary color may be the second type of primary color, the driving components corresponding to the R, C, and B primary colors have a unique solution, and the driving component corresponding to the G primary color is zero. In this way, when the target color point of the target color is located in the RGC area, the target color can be synthesized without using the B primary color to achieve blue light removal, thereby reducing the damage of blue light to the human eye.

[0128] In other optional implementations, when M=4, Figure 8 As shown, the chromaticity spectrum may include a red (R) primary color point, a yellow (Y) primary color point, a green (G) primary color point, and a blue (B) primary color point, and the wavelengths of the R, Y, G, and B primary colors corresponding to the R, Y, G, and B primary color points decrease in sequence, and at this time E=2; the sub-areas of the chromaticity spectrum may include an RYG area divided by the R, Y, and G primary color points and an RGB area divided by the R, G, and B primary color points. When the target color point of the target color is in the RYG area, the target color can be synthesized without using the B primary color to achieve blue light removal, thereby reducing the damage of blue light to the human eye.

[0129] When M=4, Fig. 9 As shown, the chromaticity spectrum may also include a red (R) primary color point, a green (G) primary color point, a blue (B) primary color point, and a white (W) primary color point, wherein the wavelengths of the R, G, and B primary colors corresponding to the R, G, and B primary color points decrease in sequence, and the wavelength of the W primary color corresponding to the W primary color point may overlap with the wavelengths of multiple primary colors; the sub-areas of the chromaticity spectrum may include an RGW area divided by the R, G, and W primary color points, a GBW area divided by the G, B, and W primary color points, and an RBW area divided by the R, B, and W primary color points. When the target color point of the target color is located in the RGW area, the target color may be synthesized without using the B primary color to achieve blue light removal, thereby reducing the damage of blue light to the human eye.

[0130] In yet another optional embodiment, when M≥5, the number of sub-areas divided by three primary color points excluding the Mth primary color point is P, 1≤P<E; wherein, 0.5≤P / E<1.

[0131] Specifically, when M≥5 and the sub-region is divided by three primary color points, the number of sub-regions in the chromaticity spectrum E≥3, and through reasonable division, at least half of all sub-regions are divided by three primary color points that do not include the Mth primary color point. While increasing the number of primary color points M in the chromaticity spectrum, the number of sub-regions P divided by three primary color points that do not include the Mth primary color point with the shortest wavelength can also be increased. The Mth primary color with the shortest wavelength in the display is usually the blue primary color. This is conducive to further reducing blue light, thereby further reducing the damage of blue light to human eyes.

[0132] For example, Fig.10 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Fig.10 , M=5, the chromaticity spectrum includes red (R) primary color point, green (G) primary color point, cyan (C) primary color point, blue (B) primary color point and white (W) primary color point, wherein the wavelengths of the R, G, C, B primary colors corresponding to the R, G, C, B primary color points decrease in sequence, and the wavelength of the W primary color corresponding to the W primary color point overlaps with the wavelengths of multiple primary colors; the sub-areas of the chromaticity spectrum include the RGC area divided by the R, G, C primary color points, the RCW area divided by the R, C, W primary color points, the CBW area divided by the C, B, W primary color points and the RBW area divided by the R, B, W primary color points. When the target color point of the target color is located in the RGC area or the RCW area, the target color can be synthesized without using the B primary color to achieve the effect of removing blue light. By increasing the number P of sub-areas divided by three primary color points that do not include the B primary color point, it is beneficial to increase the sum of the areas of the sub-areas divided by the three primary color points that do not include the B primary color point, that is, to increase the target colors that do not need to be synthesized using the B primary color, which is beneficial to further reduce blue light.

[0133] Optionally, the area of ​​the largest region enclosed by all primary color points is S; the sum of the areas of sub-regions divided by multiple primary color points excluding the Mth primary color point is S'; wherein 0.5≤S' / S<1.

[0134] Among them, the sub-region can be divided by at least three and at most M-1 primary color points. The sum of the areas of the sub-regions divided by multiple primary color points excluding the Mth primary color point is the area of ​​the area surrounded by all primary color points except the Mth primary color point. When the Mth primary color point is the blue primary color, 0.5≤S' / S<1 can make the sum of the areas of the sub-regions divided by multiple primary color points excluding the blue primary color point account for half or more of the total color gamut, so that the synthesis of at least half or more of the target colors does not need to use the blue primary color with the shortest wavelength, which is conducive to reducing the use of blue light and thus reducing damage to the human eye.

[0135] For example, continue to refer to Fig.10, M=5, the chromaticity spectrum includes R, G, C, B, W primary color points, the largest area divided by the R, G, C, B, W primary color points is the RGCB area, the area of ​​the RGCB area is S, the area of ​​the RGCW area divided by the R, G, C, W primary color points is S', and any target color in the RGCW area can be synthesized by other primary colors excluding the B primary color. Among them, the embodiment of the present invention does not limit the specific positions of the R, G, C, B, W primary color points, especially the specific positions of the newly added C and W primary color points in addition to the R, G, B primary color points, and can achieve 0.5≤S' / S<1 by setting and adjusting the specific positions of the C and W primary color points.

[0136] Optionally, the wavelength of the first primary color is greater than at least part of the wavelength of the second to Mth primary colors; and at least one sub-region is divided by a plurality of primary color points excluding the first primary color point corresponding to the first primary color.

[0137] The sub-area may be divided by at least three and at most M-1 primary color points.

[0138] For example, continue to refer to Fig.10 , M=5, the chromaticity spectrum includes R, G, C, B, and W primary color points, wherein the wavelengths of the R, G, C, and B primary colors corresponding to the R, G, C, and B primary color points decrease in sequence, and the wavelength of the W primary color corresponding to the W primary color point overlaps with the wavelengths of multiple primary colors; the first primary color is the R primary color. The sub-area includes a CBW area, and the CBW area is divided by multiple primary color points that do not include the first primary color point corresponding to the first primary color. When the target color point of the target color is located in the CBW area, the R primary color may not be used to synthesize the target color, thereby reducing the use of R primary color pixels with low luminous efficiency, which is beneficial to reducing the power consumption of the display.

[0139] In an optional embodiment, a sub-region divided by a plurality of primary color points excluding the first primary color point is a first sub-region, and the plurality of primary color points dividing the first sub-region do not include the Mth primary color point; and / or, a sub-region divided by a plurality of primary color points including the Mth primary color point is a second sub-region, and the plurality of primary color points dividing the second sub-region include the first primary color point.

[0140] Specifically, when the target color point of the target color is located in the first sub-area, the target color can be synthesized by multiple primary colors excluding the first primary color, which will make the average wavelength of the primary colors of the synthesized target color smaller and the average frequency of light higher, causing certain damage to the human eye; however, the synthesis of the target color does not use the Mth primary color with a shorter wavelength, which can avoid the Mth primary color from further lowering the average wavelength and increasing the average frequency of light, which is beneficial to reducing the damage of light to the human eye. When the target color point of the target color is located in the second sub-area, it is synthesized by multiple primary colors including the Mth primary color, which will make the average wavelength of the primary colors of the synthesized target color smaller and the average frequency of light higher, causing certain damage to the human eye; however, the synthesis of the target color will also use the first primary color with a longer wavelength, which can increase the average wavelength and reduce the average frequency of light, thereby reducing the damage of light to the human eye.

[0141] For example, Fig.11 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Fig.11 , M=5, E=3; the chromaticity spectrum includes red (R) primary color point, yellow (Y) primary color point, green (G) primary color point, cyan (C) primary color point and blue (B) primary color point, and the wavelengths of the R, Y, G, C, B primary colors corresponding to the R, Y, G, C, B primary color points decrease in sequence; the sub-areas of the chromaticity spectrum include the YGC area divided by the Y, G, C primary color points, the RYC area divided by the R, Y, C primary color points and the RCB area divided by the R, C, B primary color points. The YGC area is the first sub-area, and the primary color points dividing the YGC area include neither the R primary color point nor the B primary color point; the RCB area is the second sub-area, and the primary color points dividing the RCB area include the B primary color point and the R primary color point. In this way, when the target color point of the target color is located in the YGC area, it can be synthesized by Y, G, and C primary colors that do not include the R primary color or the B primary color; when the target color point of the target color is located in the RCB area, it can be synthesized by R, C, and B primary colors that include the B primary color and the R primary color, which is beneficial to increase the average wavelength of the primary colors (or reduce the average frequency), thereby helping to reduce damage to the human eye.

[0142] In another optional embodiment, when M≥5 and E≥4, the number of sub-areas divided by three primary color points excluding the first primary color point is Q, 1≤Q<E; wherein, 0.5≤Q / E<1.

[0143] Specifically, when M≥5 and E≥4, through reasonable division, at least half of all sub-regions can be divided by multiple primary color points that do not include the first primary color point. While increasing the number of primary color points M and the number of sub-regions E in the chromaticity spectrum, the number of sub-regions Q divided by multiple primary color points that do not include the first primary color point with the longest wavelength can also be increased. The first primary color with the longest wavelength in the display is usually the red primary color, and the luminous efficiency of the red light-emitting device is not high. This is conducive to low power consumption of the display.

[0144] For example, Fig.12 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Fig.12 , M=5, E=4; the chromaticity spectrum includes a red (R) primary color point, a green (G) primary color point, a cyan (C) primary color point, a blue (B) primary color point, and a white (W) primary color point; wherein the wavelengths of the R, G, C, B primary colors corresponding to the R, G, C, B primary color points decrease in sequence, and the wavelength of the W primary color corresponding to the W primary color point overlaps with the wavelengths of multiple primary colors. The sub-areas of the chromaticity spectrum include an RGW area divided by the R, G, W primary color points, a GCW area divided by the G, C, W primary color points, a CBW area divided by the C, B, W primary color points, and an RBW area divided by the R, B, W primary color points. When the target color point of the target color is located in the GCW area or the CBW area, the R primary color may not be used to synthesize the target color, which is beneficial to low power consumption.

[0145] By increasing the number Q of sub-regions divided by multiple primary color points excluding the R primary color point, it is beneficial to increase the sum of the areas of the sub-regions divided by multiple primary color points excluding the R primary color point, that is, the target colors that do not need to be synthesized using the R primary color are increased, which is beneficial to further reduce power consumption. In addition, by setting the W primary color point, the W primary color pixels can be increased, and the area of ​​the sub-regions divided by multiple primary color points including the W primary color point can be increased, so that the synthesis of the target color in at least part of the sub-region can be synthesized by the W primary color and other primary colors, which is beneficial to improve the display effect and reduce the color deviation, especially the display effect of the white screen of the display can be improved, and the close-range color deviation of the white screen can be reduced.

[0146] In other embodiments, Fig.13As shown, when M=5 and E=4, the chromaticity spectrum may also include a red (R) primary color point, a yellow (Y) primary color point, a green (G) primary color point, a blue (B) primary color point, and a white (W) primary color point; wherein the wavelengths of the R, Y, G, and B primary colors corresponding to the R, Y, G, and B primary color points decrease in sequence, and the wavelength of the W primary color corresponding to the W primary color point overlaps with the wavelengths of multiple primary colors. The sub-areas of the chromaticity spectrum include an RYW area divided by the R, Y, and W primary color points, a YGW area divided by the Y, G, and W primary color points, a GBW area divided by the G, B, and W primary color points, and an RBW area divided by the R, B, and W primary color points. When the target color point of the target color is located in the YGW area or the GBW area, the R primary color may not be used to synthesize the target color, which is beneficial to low power consumption.

[0147] For example, Fig.14 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Fig.14 , M=6, E=5; the chromaticity spectrum includes red (R) primary color point, yellow (Y) primary color point, green (G) primary color point, cyan (C) primary color point, blue (B) primary color point and white (W) primary color point; wherein, the wavelengths of the R, Y, G, C, B primary colors corresponding to the R, Y, G, C, B primary color points decrease in sequence, and the wavelength of the W primary color corresponding to the W primary color point overlaps with the wavelengths of multiple primary colors. The sub-areas of the chromaticity spectrum include the YGC area divided by the Y, G, C primary color points, the RYW area divided by the R, Y, W color points, the YCW area divided by the Y, C, W primary color points, the CBW area divided by the C, B, W primary color points and the RBW area divided by the R, B, W primary color points. When the target color point of the target color is located in the YGC area, the YCW area or the CBW area, the R primary color may not be used when synthesizing the target color, which is beneficial to low power consumption; when the target color point of the target color is located in the YGC area, the YCW area or the RYW area, the B primary color may not be used when synthesizing the target color, which is beneficial to reducing damage to the human eye.

[0148] exist Fig.14 In the implementation manner, the sum of the areas of sub-regions divided by multiple primary color points excluding the R primary color point and the sum of the areas of sub-regions divided by multiple primary color points excluding the B primary color point are added, and the sum of the areas of sub-regions divided by multiple primary color points excluding the R primary color point and the B primary color point are also added. This can further optimize the image conversion method, determine a unique solution, and take into account low power consumption and blue light removal.

[0149] In other embodiments, Fig.15As shown, when M=6 and E=5, the sub-regions of the chromaticity spectrum may also include an RYW region divided by R, Y, and W primary color points, a YGW region divided by Y, G, and W color points, a GCW region divided by G, C, and W primary color points, a CBW region divided by C, B, and W primary color points, and an RBW region divided by R, B, and W primary color points. When the target color point of the target color is located in any sub-region, it can be synthesized by multiple primary colors including the W primary color, which is beneficial to increase white light, improve display effect, and reduce color cast.

[0150] In another optional embodiment, the area of ​​the largest region enclosed by all primary color points is S; the sum of the areas of sub-regions divided by multiple primary color points excluding the first primary color point is S”; wherein 0.5≤S” / S<1.

[0151] Among them, the sub-region can be divided by at least three and at most M-1 primary color points. The sum of the areas of the sub-regions divided by multiple primary color points excluding the first primary color point is the area of ​​the area surrounded by all primary color points except the first primary color point. When the first primary color point is the red primary color, 0.5≤S” / S<1 can make the sum of the areas of the sub-regions divided by multiple primary color points excluding the red primary color point account for more than half of the total color gamut, so that at least half or more of the target colors are synthesized without using the red primary color with lower luminous efficiency, which is beneficial to reduce the use of red light and thus reduce power consumption.

[0152] Exemplary, reference Fig.14 and Fig.15 , M=6, the chromaticity spectrum includes R, Y, G, C, B, and W primary color points, the largest area divided by the R, Y, G, C, B, and W primary color points is the RYGCB area, the area of ​​the RYGCB area is S, and the area of ​​the YGCBW area divided by the Y, G, C, B, and W primary color points is S”, and any target color in the YGCBW area can be synthesized by other primary colors excluding the R primary color. Among them, the embodiment of the present invention does not limit the specific positions of the R, G, C, B, and W primary color points, especially the specific positions of the newly added Y, C, and W primary color points in addition to the R, G, and B primary color points, and can achieve 0.5≤S” / S<1 by setting and adjusting the specific positions of the Y, C, and W primary color points.

[0153] Based on the same inventive concept, an embodiment of the present invention further provides an image conversion device, which can be used to execute the image conversion method provided by any embodiment of the present invention. Fig.16 is a schematic diagram of the structure of an image conversion device provided by an embodiment of the present invention, referring to Fig.16 , the image conversion device 160 includes:

[0154] The receiving module 161 is used to obtain a target color and determine a target color point of the target color in a chromaticity spectrum; wherein the chromaticity spectrum includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4; the chromaticity spectrum also includes E sub-areas divided by multiple primary color points, E is an integer, and E≥2; each sub-area at least partially does not overlap;

[0155] The image conversion module 162 is used to define M driving components (D01, D02, . . . , D0M) corresponding to M primary colors, and the relationship equation between the color coordinates (X0, Y0, Z0) of the target color point and the color coordinates (Xi, Yi, Zi) of each primary color point: (X0, Y0, Z0) = D01*(X1, Y1, Z1) + D02*(X2, Y2, Z2) + . . . + D0M*(XM, YM, ZM); wherein 1≤i≤M, and i is an integer; determining a first value range of the first driving component D01 according to the relationship equation, setting the first driving component D01 to the maximum value in the first value range, and then determining the values ​​of the remaining M-1 driving components; and / or determining the Mth value range of the Mth driving component D0M according to the relationship equation, setting the Mth driving component D0M to the minimum value in the Mth value range, and then determining the values ​​of the remaining M-1 driving components;

[0156] And / or, used to determine the primary colors required to form the target color corresponding to the target color point according to the positional relationship between the target color point and each sub-area, which are recorded as the first-category primary colors, and the other primary colors are recorded as the second-category primary colors; determine the driving components corresponding to the first-category primary colors according to the color coordinates of the target color point and the color coordinates of the primary color points of the first-category primary colors, and set the driving components corresponding to the second-category primary colors to zero.

[0157] Among them, the M primary colors include a first primary color, a second primary color,..., and an Mth primary color; the wavelength of the first primary color is greater than at least part of the wavelengths of the second to Mth primary colors; the wavelength of the Mth primary color is smaller than at least part of the wavelengths of the first to M-1th primary colors.

[0158] Exemplary, reference Fig.16 The receiving module 161 may include a signal receiving unit 811 and a signal processing unit 812 , and the image conversion module 162 may include a driving component calculation unit 821 and a brightness calculation unit 822 .

[0159] The signal receiving unit 811 is used to receive an input signal IV of an image to be displayed, and the image to be displayed includes a target color to be displayed; the signal processing unit 812 is used to convert the input signal IV into corresponding RGB brightness input values, and then, based on the RGB brightness input values, determine the target color corresponding to the input signal and the color coordinates (X0, Y0, Z0) of the target color; the signal processing unit 812 can also convert the brightness information of the target color in the input signal IV into a brightness parameter K0.

[0160] The driving component calculation unit 821 is used to determine the unique solution of the driving component (D01, D02,..., D0M) corresponding to each primary color according to the received color coordinates (X0, Y0, Z0) of the target color and the relationship equation between the color coordinates of the target color and the color coordinates of each primary color; the brightness calculation unit 822 is used to determine the brightness output value (DB1, DB2,..., DBM) of each primary color according to the driving component (D01, D02,..., D0M) corresponding to each primary color and the brightness parameter K0.

[0161] The driving circuit 170 in the display can determine the driving voltage (DV1, DV2, ..., DVM) of each primary color pixel (P1, P2, ..., PM) according to the brightness output value (DB1, DB2, ..., DBM) of each primary color, and output the driving voltage corresponding to the brightness of each primary color to each primary color pixel in the display area AA, so that multiple primary color pixels display the target color. In one embodiment, the display can display multiple target colors at multiple locations at the same time, and can display multiple target colors row by row, using the visual persistence of the human eye to display a complete image in the human eye.

[0162] It should be noted that Fig.16 1 is a schematic diagram of a structure of the image conversion device 160, and for ease of understanding, a partial structure in the display is also shown, but the image conversion device 160 and the structure and the structure of the display are not limited thereto. In an optional embodiment, the image conversion device 160 may be disposed in the drive circuit 170; in another optional embodiment, at least a portion of the structure of the drive circuit 170 may be disposed in the display area AA.

[0163] The image conversion device provided in the embodiment of the present invention can execute the image conversion method provided in any embodiment of the present invention, and has the functional modules and beneficial effects of the image conversion method. For the contents not fully described in the embodiment of the image conversion device, refer to the description of the image conversion method above, and will not be repeated here; similarly, the image conversion method of the embodiment of the present invention also has the corresponding technical features and beneficial effects of the image conversion device. For the contents not fully described in the embodiment of the image conversion method, refer to the description of the image conversion device above, and will not be repeated here.

[0164] Based on the same inventive concept, an embodiment of the present invention further provides a display device, which may include a display panel, and in other embodiments may also include a display device, and the display device may be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, vehicle displays, medical equipment, industrial control equipment, touch interactive terminals, etc., and the present invention does not specifically limit this. In an optional embodiment, the display device may include the image conversion device provided in any embodiment of the present invention.

[0165] Fig.17 is a schematic diagram of a top view of a display device provided by an embodiment of the present invention, Fig.18 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, referring to Fig.17 and Fig.18 , the display device 100 provided by the embodiment of the present invention includes: a plurality of pixel units PU; the pixel unit PU includes M primary color pixels (P1, P2, .. . , PM), M is an integer, and M ≥ 4. The display mode of the display device 100 includes a first display mode; in the first display mode, in the same pixel unit PU, N primary color pixels are in a bright state, and MN primary color pixels are in a black state, N is an integer, and 3 ≤ N < M; wherein, in the first display mode, the light emission wavelength of at least part of the MN primary color pixels in the black state is at least smaller than the light emission wavelength of at least part of the N-1 primary color pixels in the bright state.

[0166] Among them, the primary color pixel can emit a primary color light. In an optional embodiment, the primary color pixel may include a pixel driving circuit and a light emitting device; in another optional embodiment, the primary color pixel may also include a portion of a backlight module, a portion of a liquid crystal layer and a primary color filter layer; in another optional embodiment, the primary color pixel may also include a pixel driving circuit, a white light emitting device and a filter film located on the surface of the white light emitting device. It should be noted that the structural schematic diagram of the primary color pixel (P1, P2, . . . , PM) in the figure can represent the setting position of the pixel driving circuit, and can also represent the setting position of the light emitting device, the filter layer, and the filter film, and the embodiment of the present invention does not limit this.

[0167] The M primary color pixels (P1, P2, . . . , PM) correspond to M primary colors, and the M primary colors may include monochromatic primary colors, such as red (R), yellow (Y), green (G), cyan (C), blue (B), etc., and the M primary colors may also include mixed color primary colors, such as white (W), etc. For monochromatic primary color pixels, their light emission wavelength may refer to a specific wavelength value, or may also be a certain wavelength range, and the light emission wavelengths of different monochromatic primary color pixels at least partially do not overlap; for mixed color primary color pixels, their light emission wavelengths are multiple specific wavelength values, or may also be one or more wavelength ranges, and the light emission wavelengths of mixed color primary color pixels may overlap with the wavelengths of other monochromatic primary color pixels.

[0168] In an optional embodiment, the light-emitting wavelength of the primary color pixel may be the peak wavelength or peak wavelength of its light-emitting spectrum, wherein the light-emitting spectrum of the monochrome primary color pixel may include at least one peak wavelength and / or at least one peak wavelength, and the light-emitting spectrum of the mixed primary color pixel may include multiple peak wavelengths or peak wavelengths; in another optional embodiment, the light-emitting wavelength of the primary color pixel may also be a wavelength range in its light-emitting spectrum that is greater than a preset brightness threshold, or a wavelength range that is greater than a preset percentage of the maximum brightness amplitude; in another optional embodiment, the light-emitting wavelengths of different monochrome primary color pixels do not overlap.

[0169] Specifically, the emission wavelength of at least some of the MN primary color pixels in the black state may be smaller than the emission wavelength of at least some of the N primary color pixels in the bright state, 3≤N<M, that is, there is at least one primary color pixel in the black state whose emission wavelength is smaller than at least some of the emission wavelengths of all the primary color pixels in the bright state; in other words, in the first display mode, in the same pixel unit PU, at least one primary color pixel is in the black state, and the primary color pixels in the black state include at least the primary color pixels with the shortest emission wavelength among all the primary color pixels.

[0170] And / or, the emission wavelength of at least some of the MN primary color pixels in the black state may be smaller than the emission wavelength of at least some of the N-1 primary color pixels in the bright state, 3≤N<M, that is, there is at least one primary color pixel in the black state whose emission wavelength is greater than the emission wavelength of one primary color pixel in the bright state, and smaller than the emission wavelength of at least some of the N-1 primary color pixels in the bright state; in other words, in the first display mode, in the same pixel unit PU, the primary color pixel with the shortest emission wavelength among all the primary color pixels is in the bright state, and the primary color pixels in the black state include at least the primary color pixel with the second shortest emission wavelength among all the primary color pixels.

[0171] From the above content, it can be seen that in the first display mode, in the same pixel unit PU, the primary color pixel with the shortest luminous wavelength among all primary color pixels does not emit light; or, the primary color pixel with the shortest luminous wavelength among all primary color pixels emits light, and the primary color pixel with the second shortest luminous wavelength among all primary color pixels does not emit light.

[0172] For example, M=5, N=4, the pixel unit PU of the display device 100 includes a red (R) pixel, a yellow (Y) pixel, a green (G) pixel, a cyan (C) pixel, and a blue (B) pixel, and the light emission wavelengths of the R, Y, G, C, and B pixels decrease in sequence, and continue to refer to Fig.17 and Fig.18 , the pixel unit PU includes R, Y, G, C, and B pixels. In the first display mode, the B pixel does not emit light, and the R, Y, G, and C pixels emit light; or, the pixel unit PU includes R, Y, G, C, and B pixels. In the first display mode, the C pixel does not emit light, and the R, Y, G, and B pixels emit light.

[0173] In other embodiments, when M=4 and N=3, the pixel units of the display device may include R, Y, G, and B pixels. In the first display mode, the B pixel does not emit light, and the R, Y, and G pixels emit light, or the G pixel does not emit light, and the R, Y, and B pixels emit light; when M=4 and N=3, the pixel units of the display device may also include R, G, C, and B pixels. In the first display mode, the B pixel does not emit light, and the R, G, and C pixels emit light, or the C pixel does not emit light, and the R, G, and B pixels emit light.

[0174] When M=5, N=3 can also be used. Continuing to take the example that the pixel units of the display device include R, Y, G, C, and B pixels, in the first display mode, the R and B pixels can be non-luminous, the Y and B pixels can be non-luminous, the G and B pixels can be non-luminous, the C and B pixels can be non-luminous, the R and C pixels can be non-luminous, the Y and C pixels can be non-luminous, or the G and C pixels can be non-luminous, and the other primary color pixels can be luminous. When M=5, the pixel units of the display device can also include R, G, C, B, and white (W) pixels, and the light emission wavelength of the W pixel can overlap with the light emission wavelengths of multiple primary color pixels. N=3 or 4, in the first display mode, the B pixel can be non-luminous, the C pixel can be non-luminous, the R and B pixels can be non-luminous, the Y and B pixels can be non-luminous, the G and B pixels can be non-luminous, the C and B pixels can be non-luminous, the R and C pixels can be non-luminous, or the G and C pixels can be non-luminous, and the other primary color pixels can be luminous.

[0175] In addition, M can also be 6, N can be 3, 4 or 5, and the pixel units of the display device can include R, Y, G, C, B, and W pixels. In the first display mode, at least the B pixel is controlled not to emit light, or the B pixel is controlled to emit light and the C pixel is controlled not to emit light. The present invention will not list them one by one.

[0176] In the above embodiment, when N=3, in the first display mode, in the same pixel unit, only three primary color pixels emit light, and the other primary color pixels do not emit light. The three primary color pixels are used to display the target color, and the driving components of the primary colors corresponding to the three primary color pixels that emit light have a unique solution, and the driving components of the primary colors corresponding to the other primary color pixels that do not emit light are all zero, so that the unique solution of the driving components of all primary colors can be determined, and then the driving voltage of each primary color pixel is determined according to the driving component of each primary color, so that each primary color pixel presents the required brightness.

[0177] When N>3, in the first display mode, in the same pixel unit, there are N kinds of primary color pixels that emit light, and other primary color pixels do not emit light. N kinds of primary color pixels are used to display the target color. There are multiple solutions for the driving components of the primary colors corresponding to the N kinds of primary color pixels that emit light. The existing image conversion method or the image conversion method provided by any embodiment of the present invention can be used to determine the unique solution of the driving components of the primary colors corresponding to the N kinds of primary color pixels that emit light. The driving components of the primary colors corresponding to other non-emitting primary color pixels are all zero, so that the unique solution of the driving components of all primary colors can be determined, and then the driving voltage of each primary color pixel is determined according to the driving components of each primary color. The embodiment of the present invention does not limit how to determine the unique solution of the driving components of the primary colors corresponding to the N kinds of primary color pixels that emit light. Preferably, among the N kinds of primary color pixels that emit light, the brightness of the primary color pixels with larger light emission wavelengths is increased as much as possible, and / or the brightness of the primary color pixels with shorter light emission wavelengths is reduced as much as possible, so that each primary color pixel presents the required brightness.

[0178] In the embodiment of the present invention, four or more primary color pixels are set in the pixel unit, which is beneficial to increasing the display color gamut of the display device and displaying more colors, thereby providing rich color expression and presenting more bright and vivid colors; it is also beneficial to reduce the linear combination of M (M>3) primary color pixels and simplify the brightness calculation of each primary color pixel by setting the first display mode and making at least one primary color pixel in the black state in the first display mode, thereby reducing the number of primary color pixels in the bright state; in addition, in the first display mode, by setting the luminous wavelength of at least MN primary color pixels that are at least partially in the black state to be at least smaller than at least part of the luminous wavelength of N-1 primary color pixels that are in the bright state, the primary color pixel with the shortest luminous wavelength can be placed in the black state, or when it is unavoidable that the primary color pixel with the shortest luminous wavelength is placed in the bright state, at least the primary color pixel with the second shortest luminous wavelength can be placed in the black state, which is beneficial to reducing short-wavelength light and raising the average wavelength, thereby reducing the damage of high-frequency (short-wavelength) light to the human eye.

[0179] Optionally, the first display mode includes a first sub-mode; in the first sub-mode, the emission wavelength of at least some of the MN primary color pixels in the black state is smaller than the emission wavelength of at least some of the N primary color pixels in the bright state; the pixel unit includes a first primary color pixel, a second primary color pixel,..., an Mth primary color pixel; the wavelength of the Mth primary color pixel is smaller than at least some of the emission wavelengths of the first primary color pixel to the M-1th primary color pixel; in the first sub-mode, the Mth primary color pixel is in the black state.

[0180] Among all the primary color pixels, the Mth primary color pixel is a single-color primary color pixel with the shortest light emission wavelength, and the light emission wavelength of the Mth primary color pixel may be smaller than at least part of the light emission wavelength of the mixed color primary color pixel.

[0181] Specifically, in the first sub-mode, the MN primary color pixels in the black state include at least the Mth primary color pixel with the shortest luminous wavelength, that is, in the first sub-mode, the display device can display any target color synthesized by multiple primary colors that do not include the Mth primary color corresponding to the Mth primary color pixel.

[0182] It should be noted that, in the embodiment of the present invention, due to the grayscale limitation of the primary color pixels, the brightness of the primary color pixels is generally discretely distributed, not continuously distributed. Therefore, in the discrete part of the brightness of the primary color pixels, all target colors presented by multiple primary color pixels are also discretely distributed. The display device mentioned in the embodiment of the present invention can display any target color in the area, which means that the display device can display any one of all discretely distributed target colors in the area, and does not mean that the display device can display the color at any position in the area.

[0183] Exemplarily, M=6, the pixel unit includes red (R) pixels, yellow (Y) pixels, green (G) pixels, cyan (C) pixels, blue (B) pixels and white (W) pixels, the emission wavelengths of R, Y, G, C, B pixels decrease in sequence, and the emission wavelength of the W primary color can overlap with the emission wavelengths of multiple primary color pixels. R, Y, G, C, B, W pixels correspond to R, Y, G, C, B, W primary colors, and also correspond to R, Y, G, C, B, W primary color points in the chromaticity spectrum, such as Fig.19 As shown, the Mth primary color pixel is a B pixel. In the first sub-mode, the display device can display an area surrounded by a plurality of primary color points excluding the B primary color point (eg, Fig.19 The area can be any target color within the filled area shown in the figure, which can be any area in the RYGCW area surrounded by the primary color points of R, Y, G, C, and W. In this way, the display of some target colors does not require the B pixels to emit light, thereby reducing the blue light with the shortest wavelength and reducing the damage of the display device to the human eye.

[0184] Based on the above embodiment, the emission wavelength of the first primary color pixel is greater than at least part of the emission wavelength of the second to Mth primary color pixels; in the first sub-mode, the first primary color pixel is in a black state.

[0185] Among all the primary color pixels, the first primary color pixel is a single-color primary color pixel with the longest light emission wavelength, and the light emission wavelength of the first primary color pixel may be greater than at least a portion of the light emission wavelength of the mixed color primary color pixel.

[0186] Specifically, in the first sub-mode, the MN primary color pixels in the black state include at least the Mth primary color pixel with the shortest luminous wavelength and the first primary color pixel. Generally, the primary color with a shorter wavelength has a higher luminous efficiency and is more harmful to the human eye; the primary color with a longer wavelength has a lower luminous efficiency and is less harmful to the human eye.

[0187] Exemplarily, M=6, and the pixel unit includes R, Y, G, C, and B pixels. The Mth primary color pixel is a B pixel, and the first pixel is an R pixel. In the first sub-mode, the display device can display any target color in the area surrounded by multiple primary color points that do not include the B primary color point and the R primary color point. The area can be any area in the RYGCW area surrounded by the Y, G, C, and W primary color points. In this way, the display of some target colors does not require the B pixel to emit light, nor does it require the R pixel to emit light, which can reduce the damage to the human eye caused by high-frequency (short-wavelength) light, and reduce the energy loss caused by long-wavelength light, so as to take into account both low power consumption and blue light removal.

[0188] Optionally, the first display mode includes a second sub-mode; in the second sub-mode, the emission wavelength of at least part of the MN primary color pixels in the black state is smaller than the emission wavelength of at least part of the N-1 primary color pixels in the bright state; the primary color pixels include the first primary color pixel,..., the M-1th primary color pixel, and the Mth primary color pixel; the wavelength of the Mth primary color pixel is smaller than at least part of the emission wavelength of the first primary color pixel to the M-1th primary color pixel; the wavelength of the M-1th primary color pixel is smaller than at least part of the emission wavelength of the first primary color pixel to the M-2th primary color pixel; in the second sub-mode, the Mth primary color pixel is in the bright state, and the M-1th primary color pixel is in the black state.

[0189] Among them, among all the primary color pixels, the Mth primary color pixel is the monochrome primary color pixel with the shortest luminous wavelength, the M-1th primary color pixel is the monochrome primary color pixel with the second shortest luminous wavelength, and the luminous wavelength of the Mth primary color pixel and the luminous wavelength of the M-1th primary color pixel can both be smaller than at least part of the luminous wavelength of the mixed primary color pixel.

[0190] Specifically, in the second sub-mode, the N primary color pixels in the bright state include at least the Mth primary color pixel with the shortest luminous wavelength, and the MN primary color pixels in the black state include at least the M-1th primary color pixel with the second shortest luminous wavelength. That is, in the second sub-mode, the display device can display any target color synthesized by multiple primary colors including the Mth primary color corresponding to the Mth primary color pixel, and excluding the M-1th primary color corresponding to the M-th primary color pixel.

[0191] Exemplarily, the pixel unit includes red (R) pixels, yellow (Y) pixels, green (G) pixels, cyan (C) pixels, blue (B) pixels and white (W) pixels. The emission wavelengths of the R, Y, G, C, and B pixels decrease in sequence. The emission wavelength of the W primary color may overlap with the emission wavelengths of multiple primary color pixels. The R, Y, G, C, B, and W pixels correspond to the R, Y, G, C, B, and W primary colors, and also correspond to the R, Y, G, C, B, and W primary color points in the chromaticity spectrum, such as Fig. 20 As shown, the Mth primary color pixel is a B pixel, and the M-1th pixel is a C pixel. In the second sub-mode, the display device can display an area surrounded by a plurality of primary color points including the B primary color point but excluding the C primary color point (such as Fig. 20 The area can be any target color within the filled area shown in the figure, which can be any area in the RYGB area surrounded by the R, Y, G, and B primary color points (the W primary color point is located in the RYGB area). In this way, when the display of some target colors inevitably requires the B pixel with the shortest luminous wavelength to emit light, the C pixel with the second shortest luminous wavelength can be made not to emit light, which can reduce the shorter wavelength cyan light to increase the average wavelength of the light, and can also reduce the damage of high-frequency (short-wavelength) light to the human eye to a certain extent.

[0192] Optionally, the primary color pixels include a first primary color pixel, a second primary color pixel,..., and an Mth primary color pixel; the wavelength of the first primary color pixel is greater than at least part of the emission wavelength of the second primary color pixel to the Mth primary color pixel; in the first display mode, the first primary color pixel is in a bright state.

[0193] Among all the primary color pixels, the first primary color pixel is a single-color primary color pixel with the longest light emission wavelength, and the light emission wavelength of the first primary color pixel may be greater than at least a portion of the light emission wavelength of the mixed color primary color pixel.

[0194] Specifically, in the first display mode, regardless of whether the primary color pixel with the shortest luminous wavelength is in the black state or the primary color pixel with the second shortest luminous wavelength is in the black state, the first primary color pixel with the longest luminous wavelength is in the bright state. This is beneficial to reduce the luminous flux of the primary color with a shorter wavelength, reduce the brightness of the primary color pixels with a shorter luminous wavelength, increase the average wavelength of the light, and thus reduce the damage of high-frequency (short-wavelength) light to the human eye.

[0195] Optionally, the display mode of the display device also includes a second display mode; in the second display mode, in the same pixel unit, V primary color pixels are in a bright state, MV primary color pixels are in a black state, V is an integer, and 3≤V<M; wherein, in the second display mode, the light-emitting wavelengths of at least two of the V primary color pixels in the bright state are smaller than the light-emitting wavelengths of at least part of the MV primary color pixels in the black state.

[0196] Among them, V can be equal to N or not equal to N, that is, the number of types of primary color pixels in the bright state in the second display mode can be the same as or different from the number of types of primary color pixels in the bright state in the first display mode, and the embodiment of the present invention is not limited.

[0197] Specifically, among the V types of primary color pixels in the bright state, the light-emitting wavelengths of at least two primary color pixels are smaller than the light-emitting wavelengths of at least part of all the primary color pixels in the black state, that is, in the second display mode, the primary color pixel with the shortest light-emitting wavelength and the primary color pixel with the second shortest light-emitting wavelength among all the primary color pixels are both in the bright state.

[0198] Exemplarily, M=6, the pixel unit includes red (R) pixels, yellow (Y) pixels, green (G) pixels, cyan (C) pixels, blue (B) pixels and white (W) pixels, the emission wavelengths of R, Y, G, C, B pixels decrease in sequence, and the emission wavelength of the W primary color can overlap with the emission wavelengths of multiple primary color pixels. R, Y, G, C, B, W pixels correspond to R, Y, G, C, B, W primary colors, and also correspond to R, Y, G, C, B, W primary color points in the chromaticity spectrum, such as Fig.21 As shown, in the second display mode, the display device can display an area surrounded by a plurality of primary color points including the B primary color point and the C primary color point (eg Fig.21 For example, in the second display mode, the display device can display any target color in the CBG area, CBY area, CBR area, and CBW area. In this way, in the second display mode, the display device can display target colors that cannot be presented in the first display mode, thereby increasing the color gamut of the display device.

[0199] It can be understood that the display device can also display any target color within the area surrounded by four or five primary color points including the B primary color point and the C primary color point, and the present invention will not explain them one by one.

[0200] On the basis of the above embodiment, in the second display mode, at least part of the light emission wavelength of the V primary color pixels that are partially in the bright state is at least greater than the light emission wavelength of one primary color pixel that is in the black state.

[0201] Exemplarily, continuing with M=6, the pixel unit includes R, Y, G, C, B, W pixels as an example, the emission wavelengths of R, Y, G, C, B pixels decrease in sequence, and the partial emission wavelength of the W primary color may be smaller than the emission wavelength of the R, Y, G, C pixels. In the second display mode, in addition to the B primary color pixels and the C primary color pixels being in the bright state, one or more of the Y, R, and W pixels may also be in the bright state, so that the MV primary color pixels in the black state include at least the G pixel, and at least part of the emission wavelength of the Y, R, and W pixels is greater than the emission wavelength of the G pixel. In this way, in the second display mode, when the B primary color pixels and the C primary color pixels emit light, the pixels with longer emission wavelengths may also emit light, which is beneficial to increase the average wavelength of the light, reduce high-frequency (short-wavelength) light, and thus reduce damage to the human eye, and avoid the B pixel, C pixel, and G pixel emitting light at the same time, which is more harmful to the human eye.

[0202] Optional, Fig. 22 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, referring to Fig. 22 The pixel unit PU includes multiple sub-pixel units (PU1, PU2); the multiple sub-pixel units (PU1, PU2) of the display device 100 are arranged in an array; the same pixel unit PU includes M primary color pixels (P1, P2,..., PM); the same sub-pixel unit (PU1 or PU2) includes K primary color pixels, K<M.

[0203] Exemplary, reference Fig. 22, M=6, K=4, the pixel unit PU may include red (R) pixels, yellow (Y) pixels, green (G) pixels, cyan (C) pixels, blue (B) pixels and white (W) pixels, the pixel unit PU may include a first sub-pixel unit PU1 and a second sub-pixel unit PU2, the first sub-pixel unit PU1 may include R, G, B, W pixels, and the second sub-pixel unit PU2 may include Y, G, C, W pixels. By setting the pixel unit PU to multiple sub-pixel units (PU1, PU2), and the M primary color pixels are not set in the same sub-pixel unit, it can be achieved that no matter how many primary color pixels the pixel unit PU includes, the minimum display unit (sub-pixel unit) of the pixel array and the number and arrangement of the primary color pixels in the minimum display unit (sub-pixel unit) can be set according to actual conditions to ensure that the display device can display a normal picture. Multiple minimum display units (sub-pixel units) can form an actual pixel unit PU. When displaying a target color, the target color can be synthesized by pixel rendering. For example, when the primary color pixels in a sub-pixel unit (PU1 or PU2) cannot achieve the target color alone, the primary color pixels in other sub-pixel units in the same pixel unit PU can be used to supplement the primary colors that the current sub-pixel unit cannot present, so as to achieve the target color. In addition, by reducing the number of primary color pixels in the minimum display unit (sub-pixel unit), it is also beneficial to improve the resolution, increase the transmittance of each primary color pixel in the minimum display unit (sub-pixel unit), and reduce the amount of data transmission in the minimum display unit (sub-pixel unit) to achieve low power consumption.

[0204] Optionally, M primary color pixels correspond to M primary color points in a chromaticity spectrum; the chromaticity spectrum also includes E sub-regions divided by multiple primary color points, E is an integer, and E≥2; the sub-regions are at least partially non-overlapping; the pixel unit includes multiple sub-pixel units; the sub-pixel unit includes multiple primary color pixels; in the same pixel unit, the primary color pixels in the sub-pixel unit correspond to the primary color points of at least one sub-region in the chromaticity spectrum.

[0205] Wherein, the sub-region is divided by at least three and at most M-1 primary color points, and at least one sub-region is divided by multiple primary color points excluding the Mth primary color point corresponding to the Mth primary color. For different sub-regions, the number of primary color points used for division can be the same or different, which is not limited in the embodiment of the present invention. In addition, each sub-region at least partially does not overlap, that is, among the multiple primary color points that divide different sub-regions, at least one primary color point is different. In an optional embodiment, the E sub-regions of the chromaticity spectrum can cover the maximum area surrounded by all primary color points.

[0206] For example, continue to take M=6, K=4 as an example, Fig.23 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, Fig.24is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Fig.23 and Fig.24 , the chromaticity spectrum includes red (R) primary color points, yellow (Y) primary color points, green (G) primary color points, cyan (C) primary color points, blue (B) primary color points and white (W) primary color points, and correspondingly, the pixel unit PU includes R, Y, G, C, B, W pixels. The chromaticity spectrum also includes an RYCB area divided by R, Y, C, B primary color points and a YGCW area divided by Y, G, C, W primary color points. Correspondingly, the pixel unit PU includes a first sub-pixel unit PU1 and a second sub-pixel unit PU2. The first sub-pixel unit PU1 may include R, Y, C, B pixels corresponding to the RYCB area, and the second sub-pixel unit PU2 may include Y, G, C, W pixels corresponding to the YGCW area. The first sub-pixel unit PU1 can display any target color located in the RYCB area, and the second sub-pixel unit PU2 can display any target color located in the RYCB area. It should be noted that the different filling patterns in the chromaticity spectrum are only used to represent different sub-areas, and are not used to limit specific sub-areas.

[0207] In this way, at least part of the target color can be realized by the sub-pixel unit (PU1 or PU2) alone, which can reduce the borrowing of primary color pixels of other sub-pixel units in the same pixel unit PU, which is conducive to uniform display, reduces color deviation, and thus improves the display effect; when the E sub-areas of the chromaticity spectrum can cover the maximum area surrounded by all primary color points, such as Fig.23 and 24 As shown, it is beneficial to realize that any target color within the color gamut of the display device 100 can be realized individually by the sub-pixel unit corresponding to the sub-region, which is beneficial to improve the rendering effect, thereby further improving the display effect.

[0208] In an optional embodiment, in at least a partial display mode of the display device, in the same pixel unit, three primary color pixels are in a bright state, and M-3 primary color pixels are in a black state.

[0209] Specifically, no matter how the primary color pixels in the multiple sub-pixel units of the pixel unit are arranged, when displaying the target color, only three of the M primary color pixels in the pixel unit can be in a bright state. This is helpful in determining a unique solution for the driving components of the three primary colors corresponding to the three primary color pixels in the bright state, thereby simplifying the process of determining the driving voltage of each primary color pixel.

[0210] In another optional embodiment, each sub-region in the chromaticity spectrum is divided by three primary color points; the pixel unit includes E sub-pixel units; the sub-pixel unit includes three primary color pixels; in the same pixel unit, the primary color pixels in each sub-pixel unit correspond to the primary color points of each sub-region in the chromaticity spectrum.

[0211] Specifically, the sub-pixel unit is provided with only three primary color pixels, and in the same sub-pixel unit, there is only one pixel of each primary color; the sub-pixel unit can independently display any target color in the sub-region divided by the three primary color points corresponding to the three primary color pixels. On the one hand, only three primary color pixels are provided in the sub-pixel unit, which is conducive to increasing the opening area of ​​each primary color pixel, improving the light transmittance, and also helping to reduce the amount of data transmission of the sub-pixel unit to achieve low power consumption; on the other hand, when displaying the target color, the sub-pixel unit corresponding to the sub-region where the target color point of the target color is located can be used to realize it separately, and the three primary color pixels in the bright state are located in the same sub-pixel unit, which is conducive to reducing color deviation and improving display effect.

[0212] For example, M=4, E=2, Fig.25 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, referring to Figure 7 and Fig.25 , the chromaticity spectrum includes a red (R) primary color point, a green (G) primary color point, a cyan (C) primary color point, and a blue (B) primary color point, and accordingly, the pixel unit PU includes R, G, C, and B pixels. The chromaticity spectrum also includes an RGC region divided by R, G, and C primary color points and an RCB region divided by R, C, and B primary color points. Correspondingly, the pixel unit PU includes a first sub-pixel unit PU1 and a second sub-pixel unit PU2. The first sub-pixel unit PU1 may include R, G, and C pixels corresponding to the RGC region, and the second sub-pixel unit PU2 may include R, C, and B pixels corresponding to the RCB region. Along the row direction, the first sub-pixel unit PU1 and the second sub-pixel unit PU2 are alternately arranged in sequence; and / or, along the column direction, the first sub-pixel unit and the second sub-pixel unit are alternately arranged in sequence. The first sub-pixel unit PU1 can display any target color located in the RGC region, and the second sub-pixel unit PU2 can display any target color located in the RCB region. When the target color of the RGC area needs to be displayed, the first sub-pixel unit PU1 in the pixel unit PU can be controlled to be displayed independently; when the target color of the RCB area needs to be displayed, rendering technology can be used to borrow the B pixel of the second sub-pixel unit PU3, and the second sub-pixel unit PU3 in the pixel unit PU can also be controlled to be displayed independently.

[0213] In other embodiments, M=4, E=2, and Figure 8 and Fig.26, the chromaticity spectrum may include red (R) primary color point, yellow (Y) primary color point, green (G) primary color point and blue (B) primary color point, and accordingly, the pixel unit may include R, Y, G, B pixels. The chromaticity spectrum may include an RYG area divided by R, Y, G primary color points and an RGB area divided by R, G, B primary color points, and the first sub-pixel unit PU1 of the pixel unit PU may include R, Y, G pixels corresponding to the RYG area, and the second sub-pixel unit PU2 may include R, G, B pixels corresponding to the RGB area.

[0214] When M=4, it can also be E=3, refer to Fig. 9 and Fig. 27 , the chromaticity spectrum may include R primary color points, G primary color points, B primary color points and white (W) primary color points, and accordingly, the pixel unit may include R, G, B, W pixels. The sub-regions of the chromaticity spectrum may include an RGW region divided by R, G, W primary color points, a GBW region divided by G, B, W primary color points and an RBW region divided by R, B, W primary color points. The pixel unit PU may include three sub-pixel units, the first sub-pixel unit PU1 may include R, G, W pixels corresponding to the RGW region, the second sub-pixel unit PU2 may include G, B, W pixels corresponding to the GBW region, and the third sub-pixel unit PU3 may include R, B, W pixels corresponding to the RBW region. The primary color pixels may be shared by pixel rendering to improve the resolution, transmittance, and reduce power consumption, while also increasing white pixels, which is beneficial to the balance of the white screen and improves the display effect.

[0215] In addition, when E=3, M=5 is also possible. Fig.11 and Fig.28 , the chromaticity spectrum may include R, Y, G, C, B primary color points, and accordingly, the pixel unit may include R, Y, G, C, B pixels. The sub-regions of the chromaticity spectrum may include a YGC region divided by Y, G, C primary color points, a RYC region divided by R, Y, C primary color points, and an RCB region divided by R, C, B primary color points. The pixel unit PU may include three sub-pixel units, the first sub-pixel unit PU1 may include Y, G, C pixels corresponding to the YGC region, the second sub-pixel unit PU2 may include R, Y, C pixels corresponding to the RYC region, and the third sub-pixel unit PU3 may include R, C, B pixels corresponding to the RCB region. While increasing the types of primary color pixels, the number of sub-pixel units is not increased to reduce the impact on transmittance and data transmission volume, thereby achieving high transmittance and low power consumption.

[0216] From the above content, it can be seen that for M<5, each sub-region in the chromaticity spectrum is divided by three primary color points, and in the same pixel unit, the primary color pixels in each sub-pixel unit respectively correspond to the primary color points of each sub-region in the chromaticity spectrum, 2≤E≤3, that is, the pixel unit includes at most three sub-pixel units; for M≥5, each sub-region in the chromaticity spectrum is divided by three primary color points, and in the same pixel unit, the primary color pixels in each sub-pixel unit respectively correspond to the primary color points of each sub-region in the chromaticity spectrum, E≥3, that is, the pixel unit includes at least three sub-pixel units. If three primary color points are still used to divide sub-regions when M>5, E≥4 will be achieved. If the primary color pixels in the sub-pixel unit correspond to the primary color points of the sub-region, there will be a large number of sub-pixel units in the same pixel unit. During rendering, the borrowed primary color pixels may be far away, affecting the rendering effect. At this time, the number of primary color points for dividing the sub-regions can be increased, and / or the number of sub-regions corresponding to the primary color pixels in the sub-pixel unit can be increased, thereby reducing the number of sub-pixel units in the pixel unit and improving the rendering display effect.

[0217] In an optional embodiment, M primary color pixels correspond to M primary color points in a chromaticity spectrum; the chromaticity spectrum also includes E sub-regions divided by four primary color points, E is an integer, and E≥2; the sub-regions are at least partially non-overlapping; the pixel unit includes E sub-pixel units; the sub-pixel unit includes four primary color pixels; in the same pixel unit, the four primary color pixels in each sub-pixel unit respectively correspond to the four primary color points of each sub-region in the chromaticity spectrum.

[0218] For example, M=5, E=2, Fig.29 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, Fig.30 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Fig.29 and Fig.30, the chromaticity spectrum may include a red (R) primary color point, a green (G) primary color point, a cyan (C) primary color point, a blue (B) primary color point, and a white (W) primary color point, and accordingly, the pixel unit may include R, G, C, B, W pixels. The sub-regions of the chromaticity spectrum may include an RGCW region divided by R, G, C, W primary color points and an RCBW region divided by R, C, B, W primary color points. The pixel unit PU may include two sub-pixel units, the first sub-pixel unit PU1 may include R, G, C, W pixels corresponding to the RGCW region, and the second sub-pixel unit PU2 may include R, C, B, W corresponding to the RCBW region. Along the row direction, the first sub-pixel unit and the second sub-pixel unit are alternately arranged in sequence; and / or, along the column direction, the first sub-pixel unit and the second sub-pixel unit are alternately arranged in sequence. The first sub-pixel unit PU1 can independently display any target color in the RGCW region, and the second sub-pixel unit PU2 can independently display any target color in the RCBW region.

[0219] In this way, when there are many types of primary color pixels set in the pixel unit, it is beneficial to reduce the number of sub-pixel units in the pixel unit, thereby reducing the distance between the primary color pixels borrowed during rendering and improving the display effect. It should be noted that although the sub-pixel unit includes four primary color pixels, in at least some display modes, at least one primary color pixel in the sub-pixel unit is in a black state, that is, only three of the four primary color pixels in the sub-pixel unit may be in a bright state, which is beneficial to determine a unique solution for the driving components of each primary color.

[0220] In another optional embodiment, each sub-region in the chromaticity spectrum is divided by three primary color points; E is an even number greater than 2; the pixel unit includes E / 2 sub-pixel units; the pixel unit includes four primary color pixels; in the same pixel unit, the four primary color pixels in each sub-pixel unit respectively correspond to the four primary color points of two adjacent sub-regions in the chromaticity spectrum.

[0221] For example, M=5, E=4, Fig.31 is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Fig.29 and Fig.31, the chromaticity spectrum may include R, G, C, B, W primary color points, and accordingly, the pixel unit may include R, G, C, B, W pixels. The sub-regions of the chromaticity spectrum may include an RGW region divided by R, G, W primary color points, a GCW region divided by G, C, W primary color points, a CBW region divided by C, B, W primary color points, and an RBW region divided by R, B, W primary color points. The pixel unit PU may include two sub-pixel units, the first sub-pixel unit PU1 may include R, G, C, W pixels corresponding to the RGW region and the GCW region, and the second sub-pixel unit PU2 may include R, C, B, W corresponding to the CBW region and the RBW region. In other embodiments, when E=6 or 8, the pixel unit may include three or four sub-pixel units, each of which includes four primary color pixels, and the four primary color pixels in the sub-pixel unit correspond to the four primary color points of two adjacent sub-regions in the chromaticity spectrum, respectively, and the present invention will not be described one by one.

[0222] When there are many types of primary color pixels set in a pixel unit and / or when there are many sub-regions divided, the primary color pixels of a sub-pixel unit can correspond to the primary color points in two adjacent sub-regions, and the number of sub-pixel units in the pixel unit can be reduced, thereby shortening the distance between the primary color pixels borrowed during rendering and improving the display effect.

[0223] In another optional embodiment, each sub-region in the chromaticity spectrum is divided by three primary color points; E is an even number greater than 2; the pixel unit includes two sub-pixel units; the sub-pixel unit includes 2+E / 2 primary color pixels; in the same pixel unit, the 2+E / 2 primary color pixels in each sub-pixel unit respectively correspond to the 2+E / 2 primary color points of adjacent E / 2 sub-regions in the chromaticity spectrum.

[0224] For example, M=5, E=4, and continue to refer to Fig.29 and Fig.31, the chromaticity spectrum may include R, G, C, B, W primary color points, and the pixel unit may include R, G, C, B, W pixels. The sub-regions of the chromaticity spectrum may include RGW region, GCW region, CBW region and RBW region, the first sub-pixel unit PU1 of the pixel unit PU may include R, G, C, W pixels corresponding to the RGW region and the GCW region, and the second sub-pixel unit PU2 may include R, C, B, W corresponding to the CBW region and the RBW region. In other embodiments, when E=6, the pixel unit still includes only two sub-pixel units, the sub-pixel unit includes five primary color pixels, and the five primary color pixels in the sub-pixel unit correspond to the five primary color points of the three adjacent sub-regions in the chromaticity spectrum; when E=8, the pixel unit still includes only two sub-pixel units, the sub-pixel unit includes six primary color pixels, and the six primary color pixels in the sub-pixel unit correspond to the six primary color points of the four adjacent sub-regions in the chromaticity spectrum, which will not be described one by one in the present invention.

[0225] When there are many types of primary color pixels set in a pixel unit and / or when there are many sub-regions divided, the pixel unit can always include two sub-pixel units. The primary color pixels in the sub-pixel unit can correspond to the primary color points of multiple adjacent sub-regions, and the number of sub-pixel units in the pixel unit can also be reduced, thereby shortening the distance between the primary color pixels borrowed during rendering and improving the display effect.

[0226] On the basis of the above embodiment, in the same pixel unit, at least one sub-pixel unit includes a blue pixel, and at least one sub-pixel unit does not include a blue pixel.

[0227] For example, continue to refer to Figure 29-Figure 31 , the chromaticity spectrum may include R, G, C, B, and W primary color points, and the pixel unit may include R, G, C, B, and W pixels. The four primary color pixels in the sub-pixel unit correspond to the four primary color points in the chromaticity spectrum, and the four primary color points corresponding to the sub-pixel unit may form a sub-pixel unit area, that is, an area with the same filling pattern in the chromaticity spectrum; wherein the R, C, and W primary color points are simultaneously located in two sub-pixel unit areas, so that the two sub-pixel units in the same pixel unit may include R, C, and W pixels, that is, the number of R, C, and W pixels in the pixel unit PU is two. At least one sub-pixel unit area includes the B primary color point corresponding to the blue pixel, so that at least one sub-pixel unit may include a blue pixel; at least one sub-pixel unit area does not include the B primary color point corresponding to the blue pixel, so that at least one sub-pixel unit does not include a blue pixel. In this way, by reducing the number of blue pixels in the pixel unit PU, it is helpful to reduce blue light, thereby reducing the damage of blue light to the human eye.

[0228] From the above content, it can be known that when M=5, and / or the number E of sub-regions in the chromaticity spectrum is an even number, the number of primary color points for dividing the sub-regions can be increased, and / or the number of primary color pixels in the sub-pixel unit can be increased, and the number of sub-pixel units in the pixel unit can be reduced to improve the rendering display effect, that is, when M=5, and / or the number E of sub-regions in the chromaticity spectrum is an even number, the primary color pixels in the sub-pixel unit in the pixel unit can be set according to the primary color points of the sub-region in the chromaticity spectrum. However, for M=6, and / or the number E of sub-regions in the chromaticity spectrum is an odd number, setting the primary color pixels in the sub-pixel unit in the pixel unit according to the primary color points of the sub-region in the chromaticity spectrum is no longer applicable. At this time, the primary color pixels in the sub-pixel unit in the pixel unit can be set according to the type of the primary color pixels in the pixel unit.

[0229] In an optional embodiment, M is an even number; the pixel unit includes two sub-pixel units; the sub-pixel unit includes M / 2 primary color pixels; and in the same pixel unit, the two sub-pixel units do not include the same primary color pixels.

[0230] For example, M=6, Fig.32 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, referring to Fig.32 , the pixel unit PU may include a red (R) pixel, a yellow (Y) pixel, a green (G) pixel, a cyan (C) pixel, a blue (B) pixel, and a white (W) pixel; the pixel unit PU may include a first sub-pixel unit PU1 and a second sub-pixel unit PU2; the first sub-pixel unit PU1 includes an R pixel, a G pixel, and a B pixel; the second sub-pixel unit PU2 includes a C pixel, a B pixel, and a W pixel. Along the row direction, the first sub-pixel unit and the second sub-pixel unit are alternately arranged in sequence; and / or, along the column direction, the first sub-pixel unit and the second sub-pixel unit are alternately arranged in sequence.

[0231] Such a setting can make the number of primary color pixels of different sub-pixel units of the same pixel unit the same, which is beneficial to pixel arrangement, thereby improving the display effect and avoiding the different numbers of primary color pixels of different sub-pixel units of the same pixel unit, which affects the pixel arrangement effect and causes uneven display. In addition, compared with the previous embodiment, this embodiment will not significantly affect the pixel transmittance and data transmission volume while increasing the types of primary color pixels, which is beneficial to low power consumption of the display device.

[0232] Based on the above embodiment, the M / 2 primary color pixels in the sub-pixel unit correspond to the M / 2 primary color points in the chromaticity spectrum, and the M / 2 primary color points corresponding to the sub-pixel unit form a sub-pixel unit area; in the same pixel unit, the sub-pixel unit areas formed by the M / 2 primary color points corresponding to two sub-pixel units overlap.

[0233] For example, Fig.33is a schematic diagram of another chromaticity spectrum provided by an embodiment of the present invention, with reference to Fig.32 and Fig.33 , M=6, the pixel unit includes R, Y, G, C, B, W pixels, and the corresponding chromaticity spectrum includes R, Y, G, C, B, W primary color points. The sub-pixel unit area formed by the R, G, B primary color points corresponding to the first sub-pixel unit PU1 is the RGB area, and the sub-pixel unit area formed by the C, B, W primary color points corresponding to the second sub-pixel unit PU2 is the CBW area, and the RGB area overlaps with the CBW area. By setting the sub-pixel unit area formed by the M / 2 primary color points corresponding to the two sub-pixel units in the same pixel unit to overlap, the pixel unit area formed by the M / 2 primary color points corresponding to the sub-pixel unit can be larger, and more target colors can be displayed independently. When rendering pixels, the borrowing of primary color pixels in adjacent sub-pixel units can be reduced, which is beneficial to reducing color deviation and improving display effects. It is avoided that the display of all target colors needs to be rendered, and the primary color pixels in adjacent sub-pixel units are borrowed. If the borrowed primary color pixels are far away, the rendering effect may be poor, which is easy to cause color deviation.

[0234] In another optional embodiment, M is an odd number; the primary color pixels of the display device include at least white pixels; the pixel unit includes two sub-pixel units; the sub-pixel unit includes (M+1) / 2 primary color pixels; and each sub-pixel unit includes a white pixel.

[0235] For example, M=5, Fig.34 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, referring to Fig.34 , the pixel unit PU may include a red (R) pixel, a green (G) pixel, a cyan (C) pixel, a blue (B) pixel, and a white (W) pixel; the pixel unit PU may include a first sub-pixel unit PU1 and a second sub-pixel unit PU2; the first sub-pixel unit PU1 includes an R pixel, a G pixel, and a W pixel; the second sub-pixel unit PU2 includes a C pixel, a B pixel, and a W pixel. Along the row direction, the first sub-pixel unit and the second sub-pixel unit are alternately arranged in sequence; and / or, along the column direction, the first sub-pixel unit and the second sub-pixel unit are alternately arranged in sequence.

[0236] In other embodiments, Fig.35 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, referring to Fig.35, the pixel unit PU may also include red (R) pixels, yellow (Y) pixels, green (G) pixels, blue (B) pixels and white (W) pixels; the pixel unit PU may include a first sub-pixel unit PU1 and a second sub-pixel unit PU2; the first sub-pixel unit PU1 includes an R pixel, a Y pixel and a W pixel; the second sub-pixel unit PU2 includes a G pixel, a B pixel and a W pixel. Along the row direction, the first sub-pixel unit and the second sub-pixel unit are alternately arranged in sequence; and / or, along the column direction, the first sub-pixel unit and the second sub-pixel unit are alternately arranged in sequence.

[0237] In this way, when the number of primary color pixels is an odd number, the same pixel unit may include M+1 primary color pixels, and white pixels are used to fill the sub-pixel units with a small number of primary color pixels, so that the same number of primary color pixels are set in different sub-pixel units, which is beneficial to pixel arrangement; both sub-pixel units include white pixels, and the white pixels are repeated, which is beneficial to increase white light, thereby increasing the display effect and reducing color deviation.

[0238] It should be noted that increasing the number of primary color points for dividing sub-regions and / or increasing the number of primary color pixels in a sub-pixel unit is not limited to when M is larger and / or E is larger, and can also be applied when M is smaller and / or E is smaller. Similarly, setting the primary color pixels in a sub-pixel unit in a pixel unit according to the type of primary color pixels in the pixel unit is not limited to when M=6 and / or when the number of sub-regions E in the chromaticity spectrum is an odd number, and when M is another integer greater than 3 and / or when the number of sub-regions E in the chromaticity spectrum is an even number, the primary color pixels in a sub-pixel unit in a pixel unit can also be set according to the type of primary color pixels in the pixel unit.

[0239] In an optional implementation, taking M=4 as an example, Fig.36 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, referring to Fig.36 , the pixel unit includes a red (R) pixel, a green (G) pixel, a blue (B) pixel and a white (W) pixel; the display device 100 includes a first pixel unit PU1, a second pixel unit PU2 and a third pixel unit PU3 arranged in an array; the first pixel unit PU1 includes an R pixel, a G pixel, and two W pixels; the second pixel unit PU2 includes an R pixel, a B pixel, and two W pixels; the third pixel unit PU3 includes a G pixel, a B pixel, and two W pixels; along the row direction, the first pixel unit, the second pixel unit and the third pixel unit are arranged alternately in a cycle; and / or, along the column direction, the first pixel unit, the second pixel unit and the third pixel unit are arranged alternately in a cycle.

[0240] Fig.36In the pixel arrangement shown, when M=4, three sub-pixel units (PU1, PU2, PU3) are set to form a pixel unit PU, and primary color pixels can be shared by pixel rendering. Fig.36 The pixel arrangement shown adopts a combination of W pixels and traditional R, G, B pixel arrangements. The three sub-pixel units (PU1, PU2, PU3) of the same pixel unit PU include two groups of R, G, B pixels, which can not only achieve rich color display, but also increase the proportion of white pixels in the pixel unit PU. The white pixels are designed diagonally in the sub-pixel units, which is beneficial to the display uniformity of the white screen and improves the display effect.

[0241] In another optional implementation, continuing to take M=4 as an example, Fig.37 is a schematic diagram of a top view of another display device provided by an embodiment of the present invention, referring to Fig.37 , the pixel unit includes a red (R) pixel, a green (G) pixel, a blue (B) pixel and a white (W) pixel; the display device 100 includes a first pixel unit PU1 and a second pixel unit PU2 arranged in an array; the first pixel unit PU1 includes an R pixel, a G pixel, and two W pixels; the second pixel unit PU2 includes a B pixel, a G pixel, and two W pixels; along the row direction, the first pixel unit and the second pixel unit are arranged alternately in sequence; and / or, along the column direction, the first pixel unit and the second pixel unit are arranged alternately in sequence.

[0242] Fig.37 In the pixel arrangement shown, when M=4, two sub-pixel units (PU1, PU2) are set to form a pixel unit PU, and the primary colors share the pixels through pixel rendering. Fig.37 The pixel arrangement shown adopts a combination of W pixels and existing R, G, B, G pixel arrangements. The two sub-pixel units (PU1, PU2) of the same pixel unit PU include a group of R, G, B, G pixels, which can not only achieve rich color display, but also increase the proportion of white pixels in the pixel unit PU. The white pixels are designed diagonally in the sub-pixel units, which is beneficial to the display uniformity of the white screen and improves the display effect.

[0243] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An image conversion method, characterized in that: include: Obtain a target color, and determine a target color point of the target color in a chromaticity spectrum; wherein the chromaticity spectrum includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4; Define the M driving components (D01, D02, . . . , D0M) corresponding to the M primary colors, and the relationship equation between the color coordinates (X0, Y0, Z0) of the target color point and the color coordinates (Xi, Yi, Zi) of each primary color point: (X0, Y0, Z0) = D01*(X1, Y1, Z1) + D02*(X2, Y2, Z2) + . . . + D0M*(XM, YM, ZM); wherein 1 ≤ i ≤ M, and i is an integer; Determine a first value range of the first driving component D01 according to the relationship equation, set the first driving component D01 to the maximum value in the first value range, and then determine the values ​​of the remaining M-1 driving components; and / or determine an Mth value range of the Mth driving component D0M according to the relationship equation, set the Mth driving component D0M to the minimum value in the Mth value range, and then determine the values ​​of the remaining M-1 driving components; Among them, the M primary colors include a first primary color, a second primary color,..., and an Mth primary color; the wavelength of the first primary color is greater than at least part of the wavelengths of the second to Mth primary colors; the wavelength of the Mth primary color is smaller than at least part of the wavelengths of the first to M-1th primary colors.

2. The image conversion method according to claim 1, characterized in that: The target color point includes a first target color point; When the target color point is the first target color point, the Mth driving component D0M=0.

3. The image conversion method according to claim 1, characterized in that: M≥5； Determining a first value range of the first driving component D01 according to the relationship equation, setting the first driving component D01 to a maximum value in the first value range, and then determining values ​​of the remaining M-1 driving components, including: Determine a first value range of the first driving component D01 according to the relationship equation, and set the first driving component D01 to the maximum value in the first value range; similarly, set the values ​​of the remaining driving components in ascending order of numbering until three driving components remain; determine the remaining three driving components according to the relationship equation and the set values ​​of the driving components; Determining the Mth value range of the Mth driving component D0M according to the relationship equation, setting the Mth driving component D0M to the minimum value in the Mth value range, and then determining the values ​​of the remaining M-1 driving components, including: Determine the Mth value range of the Mth driving component D0M according to the relationship equation, and set the Mth driving component D0M to the minimum value in the Mth value range; similarly, set the values ​​of the remaining driving components in descending order according to the numbering sequence until three driving components remain; determine the remaining three driving components according to the relationship equation and the values ​​of the driving components that have been set.

4. The image conversion method according to claim 1, characterized in that: M＝5； Determining a first value range of the first driving component D01 according to the relationship equation, setting the first driving component D01 to a maximum value in the first value range, and then determining values ​​of the remaining M-1 driving components, including: Determine a first value range of the first driving component D01 according to the relationship equation, and set the first driving component D01 to the maximum value in the first value range; determine a fifth value range of the fifth driving component D05 according to the relationship equation and the first driving component D01, and set the fifth driving component D05 to the minimum value in the fifth value range; determine the remaining three driving components according to the relationship equation, the first driving component D01 and the fifth driving component D05; Determining the Mth value range of the Mth driving component D0M according to the relationship equation, setting the Mth driving component D0M to the minimum value in the Mth value range, and then determining the values ​​of the remaining M-1 driving components, including: Determine the fifth value range of the fifth drive component D05 according to the relationship equation, and set the fifth drive component D05 to the minimum value in the fifth value range; determine the first value range of the first drive component D01 according to the relationship equation and the fifth drive component D05, and set the first drive component D01 to the maximum value in the first value range; determine the remaining three drive components according to the relationship equation, the first drive component D01 and the fifth drive component D05.

5. The image conversion method according to claim 1, characterized in that: M≥5； Determining the Mth value range of the Mth driving component D0M according to the relationship equation, setting the Mth driving component D0M to the minimum value in the Mth value range, and then determining the values ​​of the remaining M-1 driving components, including: Determine the Mth value range of the Mth driving component D0M according to the relationship equation, and set the Mth driving component D0M to the minimum value in the Mth value range; determine the first value range of the first driving component D01 according to the relationship equation and the Mth driving component D0M, and set the first driving component D01 to the minimum value in the first value range; determine the remaining M-2 driving components according to the relationship equation, the first driving component D01 and the Mth driving component D0M.

6. The image conversion method according to any one of claims 1 to 5, characterized in that: The first primary color is a red primary color; the Mth primary color is a blue primary color.

7. An image conversion method, characterized in that: include: Acquire a target color, and determine a target color point of the target color in a chromaticity spectrum; wherein the chromaticity spectrum includes M primary color points, the M primary color points correspond to M primary colors, M is an integer, and M≥4; the chromaticity spectrum also includes E sub-areas divided by a plurality of the primary color points, E is an integer, and E≥2; and each of the sub-areas at least partially does not overlap; According to the positional relationship between the target color point and each of the sub-areas, the primary colors required to form the target color corresponding to the target color point are determined as first-class primary colors, and the other primary colors are recorded as second-class primary colors; Determine the driving component corresponding to each of the first-type primary colors according to the color coordinates of the target color point and the color coordinates of the primary color points of each of the first-type primary colors, and set the driving component corresponding to the second-type primary color to zero; Among them, the M primary colors include a first primary color, a second primary color,..., and an Mth primary color, and the wavelength of the Mth primary color is smaller than at least part of the wavelength of the first to M-1th primary colors; the sub-areas are divided by at least three and at most M-1 primary color points, and at least one sub-area is divided by a plurality of primary color points that do not include the Mth primary color point corresponding to the Mth primary color.

8. The image conversion method according to claim 7, characterized in that: The primary color points of the chromaticity spectrum include at least a red (R) primary color point, a green (G) primary color point and a blue (B) primary color point; At least one of the M primary color points of the chromaticity spectrum is located outside the RGB area divided by the R, G, and B primary color points in the chromaticity spectrum.

9. The image conversion method according to claim 7, characterized in that: The primary color points of the chromaticity spectrum include at least a red (R) primary color point, a green (G) primary color point and a blue (B) primary color point; the R, G, and B primary color points correspond to R, G, and B primary colors, respectively, and the wavelengths of the R, G, and B primary colors decrease in sequence; In addition to the R, G, B primary color points, the M primary color points of the chromaticity spectrum also include at least one newly added primary color point; The wavelength of the newly added primary color corresponding to at least one of the newly added primary color points is between the wavelength of the G primary color and the wavelength of the B primary color.

10. The image conversion method according to claim 9, characterized in that: The primary color points of the chromaticity spectrum also include cyan (C) primary color points; the C primary color point corresponds to the C primary color; The wavelength of the C primary color is between the wavelength of the G primary color and the wavelength of the B primary color.

11. The image conversion method according to claim 7, characterized in that: The sub-area is divided by three primary color points; According to the positional relationship between the target color point and each of the sub-areas, the primary colors required to form the target color corresponding to the target color point are determined as first-class primary colors, and the other primary colors are recorded as second-class primary colors, including: According to the positional relationship between the target color point and each of the sub-areas, the three primary colors required to form the target color corresponding to the target color point are determined, and the three primary colors are recorded as first-class primary colors, and the other primary colors are recorded as second-class primary colors.

12. The image conversion method according to claim 7 or 11, characterized in that: M = 4, E = 2; The chromaticity spectrum includes a red (R) primary color point, a green (G) primary color point, a cyan (C) primary color point, and a blue (B) primary color point, and the wavelengths of the R, G, C, B primary colors corresponding to the R, G, C, B primary color points decrease in sequence; The sub-areas of the chromaticity spectrum include an RGC area divided by R, G, and C primary color points and an RCB area divided by R, C, and B primary color points.

13. The image conversion method according to claim 11, characterized in that: M≥5， The number of sub-areas divided by the three primary color points excluding the Mth primary color point is P, 1≤P<E; Among them, 0.5≤P / E<1.

14. The image conversion method according to claim 7, characterized in that: The area of ​​the largest region enclosed by all the primary color points is S; The sum of the areas of the sub-regions divided by the plurality of primary color points excluding the Mth primary color point is S'; Among them, 0.5≤S' / S<1.

15. The image conversion method according to claim 7, characterized in that: The wavelength of the first primary color is greater than at least part of the wavelengths of the second to Mth primary colors; At least one of the sub-areas is divided by a plurality of the primary color points excluding a first primary color point corresponding to the first primary color.

16. The image conversion method according to claim 15, characterized in that: A sub-region divided by a plurality of the primary color points excluding the first primary color point is a first sub-region; and the plurality of the primary color points dividing the first sub-region do not include the Mth primary color point; And / or, a sub-region divided by a plurality of the primary color points including the Mth primary color point is a second sub-region; and the plurality of the primary color points dividing the second sub-region include the first primary color point.

17. The image conversion method according to claim 16, characterized in that: M = 5, E = 3; The chromaticity spectrum includes a red (R) primary color point, a yellow (Y) primary color point, a green (G) primary color point, a cyan (C) primary color point, and a blue (B) primary color point, and the wavelengths of the R, Y, G, C, and B primary colors corresponding to the R, Y, G, C, and B primary color points decrease in sequence; The sub-areas of the chromaticity spectrum include a YGC area divided by Y, G, and C primary color points, a RYC area divided by R, Y, and C primary color points, and an RCB area divided by R, C, and B primary color points.

18. The image conversion method according to claim 15, characterized in that: M≥5, E≥4; The number of sub-areas divided by the three primary color points excluding the first primary color point is Q, 1≤Q<E; Among them, 0.5≤Q / E<1.

19. The image conversion method according to claim 13 or 18, characterized in that: M = 5, E = 4; The chromaticity spectrum includes a red (R) primary color point, a green (G) primary color point, a cyan (C) primary color point, a blue (B) primary color point, and a white (W) primary color point; wherein the wavelengths of the R, G, C, and B primary colors corresponding to the R, G, C, and B primary color points decrease in sequence, and the wavelength of the W primary color corresponding to the W primary color point overlaps with the wavelengths of multiple primary colors; The sub-regions of the chromaticity spectrum include an RGW region divided by R, G, and W primary color points, a GCW region divided by G, C, and W primary color points, a CBW region divided by C, B, and W primary color points, and an RBW region divided by R, B, and W primary color points.

20. The image conversion method according to claim 13 or 18, characterized in that: M = 6, E = 5; The chromaticity spectrum includes a red (R) primary color point, a yellow (Y) primary color point, a green (G) primary color point, a cyan (C) primary color point, a blue (B) primary color point, and a white (W) primary color point; wherein the wavelengths of the R, Y, G, C, and B primary colors corresponding to the R, Y, G, C, and B primary color points decrease in sequence, and the wavelength of the W primary color corresponding to the W primary color point overlaps with the wavelengths of multiple primary colors; The sub-areas of the chromaticity spectrum include a YGC area divided by Y, G, and C primary color points, a RYW area divided by R, Y, and W primary color points, a YCW area divided by Y, C, and W primary color points, a CBW area divided by C, B, and W primary color points, and a RBW area divided by R, B, and W primary color points.

21. The image conversion method according to claim 15, characterized in that: The area of ​​the largest region enclosed by all the primary color points is S; The sum of the areas of the sub-regions divided by the plurality of primary color points excluding the first primary color point is S″; Among them, 0.5≤S” / S<1.

22. A display device, characterized in that: include: A plurality of pixel units; The pixel unit includes M primary color pixels, where M is an integer and M≥4; The display mode of the display device includes a first display mode; In the first display mode, in the same pixel unit, N kinds of primary color pixels are in a bright state, and MN kinds of primary color pixels are in a black state, where N is an integer and 3≤N<M; Wherein, in the first display mode, the light emission wavelength of at least some of the MN primary color pixels in the black state is at least smaller than the light emission wavelength of at least some of the N-1 primary color pixels in the bright state.

23. The display device according to claim 22, characterized in that The first display mode includes a first sub-mode; In the first sub-mode, the light emission wavelength of at least some of the MN primary color pixels in the black state is smaller than the light emission wavelength of at least some of the N primary color pixels in the bright state; The pixel unit includes a first primary color pixel, a second primary color pixel, ..., an Mth primary color pixel; the light emission wavelength of the Mth primary color pixel is smaller than at least part of the light emission wavelengths of the first primary color pixel to the M-1th primary color pixel; In the first sub-mode, the Mth primary color pixel is in a black state.

24. The display device according to claim 23, characterized in that The light emission wavelength of the first primary color pixel is greater than at least part of the light emission wavelengths of the second primary color pixel to the Mth primary color pixel; In the first sub-mode, the first primary color pixel is in a black state.

25. The display device according to claim 22, characterized in that The first display mode includes a second sub-mode; In the second sub-mode, the light emission wavelength of at least some of the MN primary color pixels in the black state is smaller than the light emission wavelength of at least some of the N-1 primary color pixels in the bright state; The pixel unit includes a first primary color pixel, ..., an M-1th primary color pixel, and an M-th primary color pixel; the wavelength of the M-th primary color pixel is smaller than at least a portion of the light emission wavelengths of the first primary color pixel to the M-1th primary color pixel; the wavelength of the M-1th primary color pixel is smaller than at least a portion of the light emission wavelengths of the first primary color pixel to the M-2th primary color pixel; In the second sub-mode, the Mth primary color pixel is in a bright state, and the M-1th primary color pixel is in a black state.

26. The display device according to claim 22, characterized in that The primary color pixels include a first primary color pixel, a second primary color pixel, ..., and an Mth primary color pixel; the wavelength of the first primary color pixel is greater than at least a portion of the light emission wavelengths of the second primary color pixel to the Mth primary color pixel; In the first display mode, the first primary color pixel is in a bright state.

27. The display device according to claim 22, characterized in that The display mode of the display device further includes a second display mode; In the second display mode, in the same pixel unit, V types of primary color pixels are in a bright state, and MV types of primary color pixels are in a black state, where V is an integer and 3≤V<M; Wherein, in the second display mode, the light emission wavelengths of at least two of the V types of primary color pixels in the bright state are smaller than the light emission wavelengths of at least part of the MV types of primary color pixels in the black state.

28. The display device according to claim 27, characterized in that In the second display mode, at least part of the light emission wavelengths of the V kinds of primary color pixels that are partially in the bright state are at least greater than the light emission wavelength of one kind of primary color pixel that is in the black state.

29. The display device according to claim 22, characterized in that The pixel unit includes a plurality of sub-pixel units; The plurality of sub-pixel units of the display device are arranged in an array; The same pixel unit includes M kinds of primary color pixels; The same sub-pixel unit includes K kinds of primary color pixels, where K<M.

30. The display device according to claim 29, characterized in that The M kinds of primary color pixels correspond to M primary color points in the chromaticity spectrum; the chromaticity spectrum also includes E sub-areas divided by multiple primary color points, E is an integer, and E≥2; each of the sub-areas at least partially does not overlap; The pixel unit includes a plurality of sub-pixel units; the sub-pixel unit includes a plurality of primary color pixels; In the same pixel unit, the primary color pixel in the sub-pixel unit corresponds to the primary color point of at least one of the sub-regions in the chromaticity spectrum.

31. The display device according to claim 29 or 30, characterized in that: In at least a partial display mode of the display device, in the same pixel unit, three primary color pixels are in a bright state, and M-3 primary color pixels are in a black state.

32. The display device according to claim 30, characterized in that Each of the sub-areas in the chromaticity spectrum is divided by three primary color points; The pixel unit includes E sub-pixel units; the sub-pixel unit includes three primary color pixels; In the same pixel unit, the primary color pixels in each of the sub-pixel units correspond to the primary color points of each of the sub-regions in the chromaticity spectrum.

33. The display device according to claim 32, characterized in that M = 4, E = 2; The display device includes red (R) pixels, green (G) pixels, cyan (C) pixels and blue (B) pixels, and the chromaticity spectrum includes corresponding R, G, C, B primary color points; The display device comprises a first sub-pixel unit and a second sub-pixel unit arranged in an array; the first sub-pixel unit comprises an R pixel, a G pixel, and a C pixel; the second sub-pixel unit comprises an R pixel, a C pixel, and a B pixel; Along the row direction, the first sub-pixel units and the second sub-pixel units are arranged alternately in sequence; and / or, along the column direction, the first sub-pixel units and the second sub-pixel units are arranged alternately in sequence.

34. The display device according to claim 30, characterized in that Each of the sub-areas in the chromaticity spectrum is divided by three primary color points; E is an even number greater than 2; The pixel unit includes E / 2 sub-pixel units; the pixel unit includes four primary color pixels; In the same pixel unit, the four primary color pixels in each sub-pixel unit respectively correspond to the four primary color points of two adjacent sub-regions in the chromaticity spectrum.

35. The display device according to claim 30, characterized in that Each of the sub-areas in the chromaticity spectrum is divided by three primary color points; E is an even number greater than 2; The pixel unit includes two sub-pixel units; the sub-pixel unit includes 2+E / 2 primary color pixels; In the same pixel unit, 2+E / 2 primary color pixels in each sub-pixel unit respectively correspond to 2+E / 2 primary color points in adjacent E / 2 sub-regions in the chromaticity spectrum.

36. The display device according to claim 34 or 35, characterized in that In the same pixel unit, at least one of the sub-pixel units includes a blue pixel, and at least one of the sub-pixel units does not include a blue pixel.

37. The display device according to claim 29, characterized in that M is an even number; The pixel unit includes two sub-pixel units; the sub-pixel unit includes M / 2 primary color pixels; In the same pixel unit, the two sub-pixel units do not include the same primary color pixel.

38. The display device according to claim 29, characterized in that The M / 2 primary color pixels in the sub-pixel unit correspond to M / 2 primary color points in the chromaticity spectrum, and the M / 2 primary color points corresponding to the sub-pixel unit form a sub-pixel unit area; In the same pixel unit, the sub-pixel unit areas formed by the M / 2 primary color dots corresponding to two sub-pixel units overlap.

39. The display device according to claim 29, characterized in that M is an odd number; The primary color pixels of the display device include at least white pixels; The pixel unit includes two sub-pixel units; the sub-pixel unit includes (M+1) / 2 primary color pixels; Each of the sub-pixel units includes the white pixel.

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