CN111696447A

CN111696447A - Dot matrix LED display screen, method and system for displaying image and storage medium

Info

Publication number: CN111696447A
Application number: CN202010203722.2A
Authority: CN
Inventors: 卢长军; 廖宁放; 马莉; 张壮志; 查先朋
Original assignee: Leyard Optoelectronic Co Ltd; Beijing Institute of Technology BIT
Current assignee: Leyard Optoelectronic Co Ltd; Beijing Institute of Technology BIT
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-09-22

Abstract

The invention discloses a dot matrix LED display screen, a method and a system for displaying images and a storage medium. Each pixel of the dot matrix LED display screen is formed on the basis of n primary colors, wherein n is an integer larger than 3, and the color gamut formed by the n primary colors is larger than the color gamut formed by red, green and blue. The invention solves the technical problem of how to display more color information on the LED display screen.

Description

Dot matrix LED display screen, method and system for displaying image and storage medium

Technical Field

The invention relates to the field of display, in particular to a dot matrix LED display screen, a method and a system for displaying images and a storage medium.

Background

An image Display system based on Dot-Matrix Light Emitting Diode (LED) Display mainly includes: the LED display screen comprises a dot matrix LED display screen part and a drive control circuit part, wherein the dot matrix LED display screen part is composed of dot matrix LEDs. The dot matrix LED display screen has the characteristics of high saturation, wide dynamic range, high brightness and the like. Compared with other types of display screens, the dot matrix LED display screen is more suitable to be used as a carrier for large-screen display; the display device can display images and videos and has important application value in occasions such as advertisement media, commodity display, traffic control, stadiums and the like.

In the related art of the dot matrix LED display screen, most of the display screen portions of the dot matrix LED display screen are composed of dot matrix pixels of three primary colors of red, green and blue (RGB). According to the principle of colorimetry, the coverage area of the color Gamut (Gamut) of the display system composed of three primary colors of red, green and blue on the chromaticity diagram is a triangular area, and a considerable part of the color area cannot be displayed truly. Therefore, how to display more color information on the LED display screen is a problem to be solved.

In view of the above problems, no effective solution has been proposed.

Disclosure of Invention

The embodiment of the invention provides a dot matrix LED display screen, a method and a system for displaying images and a storage medium, which at least solve the technical problem of how to display more color information on the LED display screen.

According to an aspect of the embodiments of the present invention, there is provided a dot matrix LED display screen, each pixel of the dot matrix LED display screen is formed based on n primary colors, where n is an integer greater than 3, and a color gamut formed by the n primary colors is greater than a color gamut formed by red, green and blue.

Optionally, the value of n is 6.

Optionally, the arrangement structure of the sub-pixels corresponding to 6 primary colors includes one of: a hexagonal lattice arrangement structure, a 1 × 6 lattice arrangement structure, a 6 × 1 lattice arrangement structure, a 2 × 3 rectangular lattice arrangement structure, a 3 × 2 rectangular lattice arrangement structure, and a double-delta rectangular lattice structure.

Optionally, the dominant wavelength ranges corresponding to 6 primaries are: 440nm-460nm, 470nm-480nm, 490nm-510nm, 520nm-540nm, 560nm-600nm, 620nm-660 nm.

Optionally, the dominant wavelengths corresponding to 6 primaries are: 450nm, 478nm, 495nm, 530nm, 582nm and 642 nm.

According to another aspect of the embodiments of the present invention, there is also provided a method for displaying an image on a dot matrix LED display screen based on any one of the above methods, including: acquiring an n-primary color image; determining a channel excitation value of the n primary colors capable of correctly displaying a white field of the dot matrix LED display screen, and using the determined channel excitation value as a primary color unit of the dot matrix LED display screen; and according to the determined primary color unit, displaying the n primary color image on the dot matrix LED display screen in a mode of outputting the gray value of the n channel corresponding to the n primary color image source as the excitation value of the n channel.

Optionally, the n-primary color image is obtained by at least one of: obtaining an m-primary color image, and obtaining the n-primary color image through a color gamut mapping algorithm, wherein the color gamut mapping algorithm is used for mapping the m-primary color image into the n-primary color image, and m is an integer greater than 1; and acquiring the n-primary color image in a manner of shooting by a multispectral camera.

Optionally, the method further comprises: acquiring an n-k primary color image, wherein k is an integer larger than 1 and smaller than n; and displaying the n-k primary color image on the dot matrix LED display screen in a mode of closing a k channel in the n channel.

According to still another aspect of an embodiment of the present invention, there is provided a system for displaying an image, including: the dot matrix LED display screen comprises a power supply, a drive control circuit and any one of the dot matrix LED display screens, wherein the power supply is used for supplying power to the drive control circuit and the dot matrix LED display screen; the driving control circuit is used for driving and controlling the LED display chip in the dot matrix LED display screen; and the dot matrix LED display screen is used for displaying images based on the driving of the driving control circuit.

According to still another aspect of the embodiments of the present invention, there is further provided a storage medium including a stored program, wherein when the program runs, a device on which the storage medium is located is controlled to execute any one of the methods described above.

In the embodiment of the invention, each pixel of the dot matrix LED display screen is formed based on n primary colors, wherein n is an integer larger than 3, the color gamut formed by the n primary colors is larger than the color gamut formed by red, green and blue, and the color gamut formed by the n primary colors is larger than the color gamut formed by the red, green and blue, so that the purpose of improving the display color gamut of the dot matrix LED display screen is achieved, the technical effect of displaying more color information on the LED display screen is realized, and the technical problem of how to display more color information on the LED display screen is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic diagram of a dot matrix LED display screen according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a six-primary-color display screen based on dot matrix LEDs according to an embodiment of the invention;

FIG. 3 is a schematic diagram of a compact hexagonal lattice arrangement of six primary color LED sub-pixels according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a 1 × 6 rectangular lattice arrangement structure of six primary color LED sub-pixels according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a 6 × 1 rectangular lattice arrangement structure of six primary color LED sub-pixels according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a 2 × 3 rectangular lattice arrangement structure of six primary color LED sub-pixels according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a 3 × 2 rectangular lattice arrangement structure of six primary color LED sub-pixels according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a first double delta-shaped lattice arrangement structure of six primary color LED sub-pixels according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a second double delta-shaped lattice arrangement structure of six primary color LED sub-pixels according to an embodiment of the present invention;

FIG. 10 is a flow chart of a method of displaying an image based on a dot matrix LED display screen according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a white field adjustment of a six primary LED according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a system for displaying images according to an embodiment of the present invention;

fig. 13 is a comparison diagram of the color gamut of a six-primary LED display screen and the sRGB color gamut provided according to an embodiment of the present invention;

fig. 14 is a schematic diagram of the operation of a six primary LED display screen provided in accordance with a preferred embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

According to an embodiment of the present invention, a dot matrix LED display screen is provided, and fig. 1 is a schematic diagram of a dot matrix LED display screen provided according to an embodiment of the present invention, as shown in fig. 1, each pixel of the dot matrix LED display screen is formed based on n primary colors, where n is an integer greater than 3, and a color gamut formed by the n primary colors is greater than a color gamut formed by red, green, and blue. The color gamut formed by the n primary colors in the embodiment of the invention is larger than the color gamut formed by the red, the green and the blue, so that the display color gamut of the dot matrix LED display screen is improved, the technical effect of displaying more color information on the LED display screen is realized, and the technical problem of how to display more color information on the LED display screen is solved.

Based on the related art, a considerable portion of the color area cannot be displayed truly, which results in a technical problem that more color information cannot be displayed on the LED display screen. In the embodiment of the present invention, a value of n is taken as 6 for illustration, a six-primary-color display screen based on a dot-matrix LED is provided, fig. 2 is a schematic diagram of a six-primary-color display screen based on a dot-matrix LED according to an embodiment of the present invention, and as shown in fig. 2, each of the single pixel units in the six-primary-color display screen is formed by six sub-pixels with different main wavelengths. It should be noted that, in the embodiment of the present invention, the value of n is mainly described as 6, and since the six-primary-color display screen of the dot matrix LED can be clearer and the technical effect of the present application is simply embodied, the six-primary-color display screen of the dot matrix LED is mainly described as an example. For other options that improve the color gamut by increasing the number of primary colors, so that the LED display screen can display more colors (for example, a five-primary-color display screen of a dot matrix LED, a seven-primary-color display screen of a dot matrix LED, an eight-primary-color display screen of a dot matrix LED, etc.), the present application also belongs to the present application, and no examples are given here.

According to the minimum resolution of human eyes, the sub-pixels of the LEDs with different colors should satisfy a compact arrangement structure, and in the embodiment of the present invention, the arrangement structure of the sub-pixels corresponding to 6 primary colors may be various, which is exemplified below.

For example, seven possible sub-pixel arrangement structures are proposed in the embodiments of the present invention: the pixel structure comprises a compact hexagonal lattice arrangement structure (figure 3), a 1 × 6 rectangular lattice arrangement structure (figure 4), a 6 × 1 rectangular lattice arrangement structure (figure 5), a 2 × 3 rectangular lattice arrangement structure (figure 6), a 3 × 2 rectangular lattice arrangement structure (figure 7), and a double delta lattice arrangement structure (comprising a first double delta lattice arrangement structure (figure 8) and a second double delta lattice arrangement structure (figure 9)) so as to meet the condition that an observer cannot distinguish a single sub-pixel exactly under the condition of being as close as possible. The compact hexagonal lattice arrangement structure enables the distance between any two main wavelength LED sub-pixels to be minimum, and the distances of all the sub-pixels are consistent, so that light can be well uniformly distributed; the other lattice arrangement structures can be well compatible with three-primary-color display (namely, the six-primary-color lattice LED display screen provided by the embodiment of the invention can be compatible with the existing three-primary-color display by closing three channels).

According to the basic principle that the color vision uniformity of human eyes and the wavelength range are as large as possible, aiming at six primary colors of a six-primary-color display screen, the main wavelength ranges respectively corresponding to the six primary colors can be respectively as follows: 440nm-460nm, 470nm-480nm, 490nm-510nm, 520nm-540nm, 560nm-600nm, 620nm-660 nm. Preferably, the dominant wavelengths corresponding to the six primaries may be: 450nm, 478nm, 495nm, 530nm, 582nm and 642 nm. The colors selected corresponding to the dot matrix LED sub-pixels are as follows in sequence: red, yellow, green, cyan, bluish, blue.

According to an embodiment of the present invention, there is provided a method embodiment of a method for displaying an image on a dot matrix LED display screen according to any one of the above embodiments, it is noted that the steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from the order shown.

Fig. 10 is a flowchart of a method for displaying an image based on a dot matrix LED display screen according to an embodiment of the present invention, as shown in fig. 10, the method comprising the steps of:

step S1002, acquiring an n-primary color image;

step S1004, determining a channel excitation value of the n primary colors capable of correctly displaying a white field of the dot matrix LED display screen, and taking the determined channel excitation value as a primary color unit of the dot matrix LED display screen;

step S1006, according to the determined primary color unit, displaying an n-primary color image on the dot-matrix LED display screen by outputting the gray value of the n-channel corresponding to the n-primary color image source as the excitation value of the n-channel.

Through the steps, after the channel excitation value of the white field of the dot matrix LED display screen can be correctly displayed by the n primary colors is determined, and the determined channel excitation value is used as the primary color unit of the dot matrix LED display screen, the display color gamut of the dot matrix LED display screen is improved because the color gamut formed by the n primary colors is larger than the color gamut formed by red, green and blue, so that the n primary color image displayed on the dot matrix LED display screen can display more color information, and the technical problem of how to display more color information on the LED display screen is solved.

Alternatively, when acquiring the n-primary color image, the n-primary color image may be acquired in various ways, for example, by at least one of the following ways: acquiring an m primary color image, and acquiring an n primary color image through a color gamut mapping algorithm, wherein the color gamut mapping algorithm is used for mapping the m primary color image into the n primary color image, and m is an integer greater than 1; and acquiring the n-primary color image in a multispectral camera shooting mode.

The gamut mapping algorithm is a general term of a series of specific algorithms, and the basic flow is that to ensure the consistency of colors among different devices, the colors need to be adjusted. This adjustment process is gamut mapping. The large gamut is clipped to match the smaller gamut, and the smaller gamut can be stretched to obtain a larger gamut.

In addition, when the multispectral camera is used for acquiring an n primary color image, taking acquiring a six primary color image as an example, the main steps include: (1) acquiring gray level images of 8-10 wave bands of visible light of a target scene by using a multispectral camera; (2) carrying out spectral reconstruction on a target scene by using methods such as a PAC algorithm, a pseudo-inverse method, a neural network and the like according to the gray level images of the wave bands; (3) and calculating the gray value corresponding to each channel of the six primary color images according to the response characteristic (visual function) of human eyes to the spectrum and the reconstructed spectrum in the previous step.

It should be noted that the above two ways of obtaining the n-primary color image are only examples, and other transformations or obvious changes belonging to the above two obtaining ways also belong to the protection content of the present application.

In addition, before the n-primary color image is displayed, the channel excitation value of the white field of the dot matrix LED display screen which can be correctly displayed by the n-primary colors is determined, and the determined channel excitation value is taken as the primary color unit of the dot matrix LED display screen. Taking the value of n as 6 as an example, the channel excitation (current or voltage) value of the white field (D65) just synthesized by the six primary colors obtained by the white field adjustment of the six-primary-color display screen is used as the primary color unit of the color space of the six-primary-color display screen. Namely, the six-primary-color display screen obtains a six-primary-color image through a color gamut mapping algorithm or a multispectral camera, and displays the obtained six-primary-color image. When displaying a six-primary-color image, selecting a D65 light source as a white field, and obtaining channel signal parameters (i.e., the channel excitation values) that the six primary-color LED sub-pixels can correctly display the white field by calculation and debugging, as shown in fig. 11, fig. 11 is a schematic diagram of a white field allocation of the six primary-color LED according to an embodiment of the present invention.

In order to be compatible with the display of the LED display screen with fewer primary colors in the related art, in an embodiment of the present invention, the method may further include: acquiring an n-k primary color image, wherein k is an integer larger than 1 and smaller than n; and displaying an n-k primary color image on the dot array LED display screen by closing a k channel in the n channel. Through the processing, the dot matrix LED display screen provided by the embodiment of the invention can also display images with fewer primary colors. For example, in the case that the dot matrix LED display screen provided in the embodiment of the present invention is a six-primary color display screen, k may take a value of 3, that is, the six-primary color display screen in the embodiment of the present invention can be used for displaying a three-primary color display screen in the related art.

In an embodiment of the present invention, a storage medium is further provided, where the storage medium includes a stored program, and when the program runs, a device on which the storage medium is located is controlled to execute any one of the above methods for displaying an image based on a dot matrix LED display screen.

In an embodiment of the present invention, there is also provided a system for displaying an image, and fig. 12 is a schematic diagram of a system for displaying an image according to an embodiment of the present invention, and as shown in fig. 12, the system 120 for displaying an image includes: the power supply 120 is communicated with the driving control circuit 124 and the dot matrix LED display screen 126 and is used for supplying power to the driving control circuit 124 and the dot matrix LED display screen 126; a driving control circuit 124, which is communicated with the dot matrix LED display screen 126 and is used for driving and controlling the LED display chip in the dot matrix LED display screen 126; and a dot matrix LED display 126 for displaying an image based on the driving of the driving control circuit 124.

Compared with the related art LED display screen, the color gamut is greatly expanded due to the increase of the number of primary colors. Fig. 13 is a comparison diagram of the color gamut of a six-primary LED display screen provided by an embodiment of the present invention and the sRGB color gamut, and as shown in fig. 13, the dot matrix LED display screen provided by an embodiment of the present invention has a significant color gamut improvement. Therefore, the dot matrix LED screen provided by the embodiment of the invention has the advantages of large display color gamut, low power consumption, high color reduction degree and the like, and effectively solves the problem that the display color gamut is limited and the color reduction degree is not high when an LED display screen (for example, a three-primary color LED display screen) displays an image in the related art.

Also take six primary color LED display screens as an example, in the preferred embodiment of the present invention, the operation process thereof will be described.

The six-primary-color display screen of the dot matrix LED provided by the preferred embodiment of the invention uses six LED sub-pixels with higher saturation to form a pixel point. And mapping the common three primary color image into a six-primary color image by combining a color gamut mapping algorithm or directly acquiring the six-primary color image by adopting a multispectral camera. Thereafter, the acquired six primary color image is displayed on a six primary color display screen. Since the six-primary color display screen has a larger color gamut, it has the advantages of reproducing a high-saturation color scene in the nature and exhibiting a high-saturation light source color.

Fig. 14 is a schematic diagram of the operation process of the six-primary color LED display screen provided in the preferred embodiment of the present invention, and as shown in fig. 14, the operation process of the six-primary color LED display screen mainly includes: (1) acquiring a six-primary-color image; (2) a six primary color image is displayed. The following are described separately.

(1) Obtaining six primary color images

Currently, a mainstream image capturing Device, such as a Charge-coupled Device (CCD) or a Complementary Metal-Oxide-Semiconductor (CMOS) sensor, obtains a gray value of each Color channel based on a bayer filter of a red, green, and blue (RGB) channel, and obtains the gray value through a Color Interpolation (Color Interpolation) and a demosaicing (demosaicing) process, so that a final obtained image is a three-channel (three-primary Color) image. A color gamut mapping algorithm is mainly adopted for deriving a six-primary-color image from the existing three-primary-color image, and the traditional three-primary-color image is mapped to obtain the six-primary-color image, so that the six-primary-color image can be displayed on a six-primary-color display screen. It should be noted that the color gamut mapping algorithm is complex, and the scene adaptivity may not be high, so that preferably, the multispectral camera may be used to obtain the six primary color image.

(2) Displaying six primary color images

In the manner shown in fig. 11, the ratios of the six sub-pixel actuations (voltages or currents) obtained when the six LED sub-pixels in the present embodiment are exactly matched to the white field (D65 light source) are found as the unit of the six primary colors. The six primary color sub-pixels are respectively applied with the excitation (voltage or current) which is proportional to the gray value of six channels of the six primary color images, so that the six primary color images can be correctly displayed on the dot matrix LED six primary color display screen in the embodiment of the invention.

Based on the working process of the six-primary-color LED display screen, the following specific implementation mode is provided.

Embodiment mode 1:

according to the basic principle that the color vision uniformity of human eyes and the wavelength range are as large as possible, the dominant wavelengths of six primary color LEDs are determined, and the dominant wavelengths are respectively as follows: the corresponding chromaticity coordinates (x, y) are as follows in table 1:

Wd(nm)	CIE-x	CIE-y
			450	0.1578	0.0192
478	0.1119	0.1181
			495	0.065	0.429
530	0.1774	0.7456
			582	0.5284	0.4702
642	0.7206	0.2789

TABLE 1

A Canon 1000D digital single-lens reflex camera on the market is adopted to obtain a three-primary-color image based on an sRGB space, a six-primary-color image is obtained through a color gamut expansion algorithm in color gamut mapping, and the six-primary-color image is displayed on a dot matrix six-primary-color LED display screen in the specific embodiment of the invention through the driving of a computer display card.

Embodiment mode 2:

the six-primary-color LED display screen with the same parameters as those of the specific embodiment 1 is adopted, and the image is acquired by a static six-channel spectral camera and displayed on the six-primary-color LED display screen of the specific embodiment of the present invention.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A dot matrix LED display screen is characterized in that each pixel of the dot matrix LED display screen is formed on the basis of n primary colors, wherein n is an integer larger than 3, and the color gamut formed by the n primary colors is larger than the color gamut formed by red, green and blue.

2. A dot matrix LED display screen according to claim 1, characterised in that n has a value of 6.

3. A dot matrix LED display screen according to claim 2, wherein the arrangement of sub-pixels corresponding to 6 primary colors comprises one of: a hexagonal lattice arrangement structure, a 1 × 6 lattice arrangement structure, a 6 × 1 lattice arrangement structure, a 2 × 3 rectangular lattice arrangement structure, a 3 × 2 rectangular lattice arrangement structure, and a double-delta rectangular lattice structure.

4. A dot matrix LED display screen according to claim 2 or 3, wherein the dominant wavelength ranges corresponding to 6 primary colors are: 440nm-460nm, 470nm-480nm, 490nm-510nm, 520nm-540nm, 560nm-600nm, 620nm-660 nm.

5. A dot matrix LED display screen according to claim 4, characterized in that the dominant wavelengths corresponding to 6 primary colors are respectively: 450nm, 478nm, 495nm, 530nm, 582nm and 642 nm.

6. A method for displaying images based on the dot matrix LED display screen of any one of claims 1 to 5, which is characterized by comprising the following steps:

acquiring an n-primary color image;

determining a channel excitation value of the n primary colors capable of correctly displaying a white field of the dot matrix LED display screen, and using the determined channel excitation value as a primary color unit of the dot matrix LED display screen;

and according to the determined primary color unit, displaying the n primary color image on the dot matrix LED display screen in a mode of outputting the gray value of the n channel corresponding to the n primary color image source as the excitation value of the n channel.

7. The method of claim 6, wherein the n-primary color image is obtained by at least one of:

obtaining an m-primary color image, and obtaining the n-primary color image through a color gamut mapping algorithm, wherein the color gamut mapping algorithm is used for mapping the m-primary color image into the n-primary color image, and m is an integer greater than 1;

and acquiring the n-primary color image in a manner of shooting by a multispectral camera.

8. The method according to claim 6 or 7, characterized in that the method further comprises:

acquiring an n-k primary color image, wherein k is an integer larger than 1 and smaller than n;

and displaying the n-k primary color image on the dot matrix LED display screen in a mode of closing a k channel in the n channel.

9. A system for displaying an image, comprising: a power supply, a drive control circuit, and the dot matrix LED display of any one of claims 1 to 5,

the power supply is used for supplying power to the drive control circuit and the dot matrix LED display screen;

the driving control circuit is used for driving and controlling the LED display chip in the dot matrix LED display screen;

and the dot matrix LED display screen is used for displaying images based on the driving of the driving control circuit.

10. A storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the storage medium is located to perform the method of any one of claims 6 to 8.