Method and device for improving color rendering index of LED display screen

Abstract

The invention discloses a method and device for improving the color rendering index of an LED display screen, and the method comprises the steps: adding a first white light sub-pixel W1 and a second white light sub-pixel W2 in an RGB display unit of the LED display screen, and forming an RGBW1W2 screen; the method comprises the following steps: acquiring brightness characteristics of each sub-pixel in an RGBW1W2 screen, and constructing an RGBW1W2 screen characteristic conversion matrix according to the brightness characteristics; according to the to-be-transmitted rgb signal and the RGBW1W2 screen characteristic conversion matrix, obtaining an output signal of each sub-pixel in the RGBW1W2 screen; color temperature adjustment is achieved by adjusting the output proportion of the first white light sub-pixel W1 and the second white light sub-pixel W2. By adding W1 and W2 in the RGB display screen, the color temperature of the screen can be accurate, and a high color rendering index can be kept. Meanwhile, the method can ensure that the color temperature of the screen is accurate.

Description

Technical Field

[0001] The present invention relates to the field of LED display technology, and in particular to a method and device for improving the color rendering index of an LED display screen. Background Art

[0002] In the field of display technology, the color rendering index (CRI) is an important indicator of a light source's ability to reproduce the color of an object. It reflects the degree of realism of the color of an object under a light source compared to the color under natural light (such as sunlight). Light sources with a high CRI can more accurately reproduce the true color of an object, enhancing the visual experience. Therefore, they are widely used in high-end display equipment, photography, design, and other fields. Traditional LED displays use a mixture of the three primary colors red (R), green (G), and blue (B) to present various colors. However, this solution has certain limitations in color rendering, especially when colors close to natural light need to be presented, which often makes it difficult to achieve the desired color rendering effect. To improve this situation, the industry has attempted to add white (W) light sources to LED displays, creating RGBW displays, in the hope of improving the CRI by increasing the white light component.

[0003] However, existing RGBW display solutions have significant shortcomings in color temperature adjustment. Specifically, when adjusting the display's color temperature to suit different environments or application requirements, the color rendering index often drops significantly, resulting in a weakened color reproduction capability and an inability to meet high-quality color rendering requirements. This shortcoming has limited the further promotion and application of RGBW displays in the high-end display market.

[0004] Therefore, those skilled in the art are in urgent need of developing a new solution to solve the above problems. Summary of the Invention

[0005] In order to overcome the problems existing in the related art, the present invention discloses a method and a device for improving the color rendering index of an LED display screen.

[0006] According to a first aspect of the disclosed embodiments of the present invention, a method for improving the color rendering index of an LED display screen is provided, the method comprising:

[0007] A first white light sub-pixel W1 and a second white light sub-pixel W2 are added to the RGB display unit of the LED display screen to form an RGBW1W2 screen;

[0008] Obtaining the brightness characteristics of each sub-pixel in the RGBW1W2 screen, and constructing the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristics;

[0009] Obtaining an output signal of each sub-pixel in the RGBW1W2 screen according to the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix;

[0010] The color temperature is adjusted by adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2.

[0011] Optionally, obtaining the brightness characteristics of each sub-pixel in the RGBW1W2 screen and constructing the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristics includes:

[0012] Respectively measuring the luminance coordinate value of each sub-pixel of the RGBW1W2 screen when the grayscale value is 255, so as to determine the tristimulus value matrix of each sub-pixel according to the luminance coordinate value of each sub-pixel;

[0013] Determine the brightness characteristics of the first white light sub-pixel W1 and the second white light sub-pixel W2 in the RGBW1W2 screen according to the tristimulus value matrix of each sub-pixel;

[0014] The RGBW1W2 screen characteristic conversion matrix is ​​constructed according to the brightness characteristic.

[0015] Optionally, the brightness characteristic of the first white light sub-pixel W1 is ,in, , Represents the tristimulus value matrix of RGB light points, represents the tristimulus value matrix of W1;

[0016] The brightness characteristic of the second white sub-pixel W2 is ,in , Represents the tristimulus value matrix of W2.

[0017] Optionally, the RGBW1W2 screen characteristic conversion matrix is:

[0018] , where R, G, and B represent the output signals of the RGB light points respectively, r, g, and b represent the input signals corresponding to the RGB light points in the signal to be transmitted respectively, and p is the first conversion coefficient. , q is the second conversion coefficient, , , gamMax represents the maximum output value of the first white light sub-pixel W1 and the second white light sub-pixel W2 after gamma correction, and x and y represent the brightness coordinate values ​​of the sub-pixels when the grayscale value is 255.

[0019] Optionally, the method further includes:

[0020] While adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2, the total spectral power distribution of each sub-pixel is maintained above 90.

[0021] Optionally, obtaining the output signal of each sub-pixel in the RGBW1W2 screen according to the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix includes:

[0022] Get the RGB signal to be transmitted;

[0023] The input signal corresponding to the RGB lamp point in the RGB to be transmitted is used as the input of the RGBW1W2 screen characteristic conversion matrix, and the output signal of the RGB lamp point is determined according to the output of the RGBW1W2 screen characteristic conversion matrix.

[0024] According to a second aspect of the disclosed embodiments of the present invention, there is provided a device for improving the color rendering index of an LED display screen, the device comprising:

[0025] The screen construction module adds a first white light sub-pixel W1 and a second white light sub-pixel W2 to the RGB display unit of the LED display screen to form an RGBW1W2 screen;

[0026] a matrix acquisition module, connected to the screen construction module, for acquiring the brightness characteristics of each sub-pixel in the RGBW1W2 screen and constructing the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristics;

[0027] An output signal acquisition module is connected to the matrix acquisition module and acquires the output signal of each sub-pixel in the RGBW1W2 screen according to the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix;

[0028] The color temperature adjustment module is connected to the output signal acquisition module, and realizes color temperature adjustment by adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2.

[0029] Optionally, the matrix acquisition module includes:

[0030] a screen measurement unit for respectively measuring the luminance coordinate value of each sub-pixel of the RGBW1W2 screen when the grayscale value is 255, so as to determine a tristimulus value matrix of each sub-pixel according to the luminance coordinate value of each sub-pixel;

[0031] a luminance characteristic acquisition unit connected to the screen measurement unit, and determining the luminance characteristics of the first white light sub-pixel W1 and the second white light sub-pixel W2 in the RGBW1W2 screen according to the tristimulus value matrix of each sub-pixel;

[0032] The conversion matrix acquisition unit is connected to the brightness characteristic acquisition unit and constructs the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristic.

[0033] Optionally, the device further includes:

[0034] While adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2, the total spectral power distribution of each sub-pixel is maintained above 90.

[0035] Optionally, the output signal acquisition module includes:

[0036] A signal acquisition unit to be transmitted, which acquires the RGB signal to be transmitted;

[0037] An output signal acquisition unit is connected to the signal acquisition unit to be transmitted, and uses the input signal corresponding to the RGB lamp point in the RGB to be transmitted as the input of the RGBW1W2 screen characteristic conversion matrix, and determines the output signal of the RGB lamp point according to the output of the RGBW1W2 screen characteristic conversion matrix.

[0038] In summary, the present invention discloses a method and apparatus for improving the color rendering index of an LED display screen. The method includes: adding a first white light sub-pixel W1 and a second white light sub-pixel W2 to the RGB display unit of the LED display screen to form an RGBW1W2 screen; obtaining the brightness characteristics of each sub-pixel in the RGBW1W2 screen, and constructing an RGBW1W2 screen characteristic conversion matrix based on the brightness characteristics; obtaining the output signal of each sub-pixel in the RGBW1W2 screen based on the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix; and adjusting the color temperature by adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2. By adding W1 and W2 to the RGB display screen, the screen color temperature can be accurately maintained while maintaining a high color rendering index. At the same time, this method can ensure the accuracy of the screen color temperature.

[0039] Other features and advantages disclosed in the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0041] Figure 1 This is a flow chart of a method for improving the color rendering index of an LED display screen according to an exemplary embodiment;

[0042] Figure 2 is based on Figure 1 A flow chart of a method for obtaining a screen characteristic conversion matrix is ​​shown;

[0043] Figure 3 is based on Figure 1A schematic flow chart of a method for converting a signal to be transmitted is shown;

[0044] Figure 4 This is a schematic structural diagram of a device for improving the color rendering index of an LED display screen according to an exemplary embodiment;

[0045] Figure 5 is based on Figure 4 A structural diagram of a matrix acquisition module is shown;

[0046] Figure 6 is based on Figure 4 A structural diagram of an output signal acquisition module is shown. DETAILED DESCRIPTION

[0047] The following is a detailed description of the specific embodiments disclosed in the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0048] Figure 1 FIG. 1 is a flow chart of a method for improving the color rendering index of an LED display screen according to an exemplary embodiment. Figure 1 As shown, the method includes:

[0049] In step 101, a first white light sub-pixel W1 and a second white light sub-pixel W2 are added to the RGB display unit of the LED display screen to form an RGBW1W2 screen.

[0050] For example, in the embodiment disclosed in the present invention, two white light sub-pixels with different characteristics (i.e., a first white light sub-pixel W1 and a second white light sub-pixel W2) are added to a traditional RGB display screen to form a pixel structure with 5 transmission channels, constituting an RGBW1W2 screen.

[0051] It's important to note that traditional RGB displays rely on a mixture of red (R), green (G), and blue (B) light points to generate white light. However, this spectrum is discontinuous, resulting in poor color reproduction (CRI typically <80). Adjusting the color temperature requires changing the RGB ratio, but this significantly reduces the CRI (for example, cooler color temperatures require increasing blue light, which reduces red rendering). Therefore, two white light sub-pixels with different characteristics are added. When high brightness is required, W1 / W2 (which has higher luminous efficiency than a mixed RGB display) is prioritized. When displaying white light, W1 / W2 is used directly, reducing the use of RGB sub-pixels.

[0052] In step 102, the brightness characteristics of each sub-pixel in the RGBW1W2 screen are obtained, and the RGBW1W2 screen characteristic conversion matrix is ​​constructed according to the brightness characteristics.

[0053] For example, in an RGBW1W2 screen, the input signal is traditional RGB three-channel data, but the actual driving requires controlling the brightness of five sub-pixels (R, G, B, W1, and W2). Therefore, it is necessary to establish a screen characteristic conversion matrix to convert the signal to be transmitted from RGB (for the purpose of distinction in the disclosed embodiments of this invention, denoted by RGB) input to RGBW1W2 output.

[0054] Specifically, Figure 2 is based on Figure 1 A flow chart of a method for obtaining a screen characteristic conversion matrix is ​​shown in FIG. Figure 2 As shown, step 102 includes:

[0055] In step 1021 , the luminance coordinate values ​​of each sub-pixel of the RGBW1W2 screen when the grayscale value is 255 are measured respectively, so as to determine the tristimulus value matrix of each sub-pixel according to the luminance coordinate values ​​of each sub-pixel.

[0056] For example, a light gun is used to measure the brightness coordinate value of each sub-pixel in the RGBW1W2 screen when the brightness is maximum (grayscale value is 255), and the tristimulus value matrix is ​​determined.

[0057] In step 1022 , the brightness characteristics of the first white light sub-pixel W1 and the second white light sub-pixel W2 in the RGBW1W2 screen are determined according to the tristimulus value matrix of each sub-pixel.

[0058] For example, the brightness characteristic of the first white light sub-pixel W1 is ,in, , Represents the tristimulus value matrix of RGB light points, represents the tristimulus value matrix of W1;

[0059] The brightness characteristic of the second white sub-pixel W2 is: ,in , Represents the tristimulus value matrix of W2.

[0060] In step 1023, the RGBW1W2 screen characteristic conversion matrix is ​​constructed according to the brightness characteristic.

[0061] For example, the RGBW1W2 screen characteristic conversion matrix is:

[0062] , where R, G, and B represent the output signals of the RGB light points respectively, r, g, and b represent the input signals corresponding to the RGB light points in the signal to be transmitted respectively, and p is the first conversion coefficient. , q is the second conversion coefficient, , gamMax represents the maximum output value of the first white sub-pixel W1 and the second white sub-pixel W2 after gamma correction, and x and y represent the luminance coordinate values ​​of the sub-pixels when the grayscale value is 255. In the above formula, find the optimal solution x and y, and when n = 1, the color rendering index of the screen can be greatly improved.

[0063] It can be understood that p represents a first conversion coefficient from RGB to the first white light sub-pixel W1 , and p represents a second conversion coefficient from RGB to the second white light sub-pixel W2 .

[0064] In addition, in another embodiment of the present invention, if the customer requires the screen to achieve higher brightness in some scenarios, it is necessary to adjust the brightness of the screen through the super display index m.

[0065] in, , , , , , k1, k2, and k3 are weight coefficients. The super display index m defaults to 0. When m is not 0, the color temperature of the screen cannot be guaranteed.

[0066] In step 103, the output signal of each sub-pixel in the RGBW1W2 screen is obtained according to the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix.

[0067] Specifically, Figure 3 is based on Figure 1 A flow chart of a method for converting a signal to be transmitted is shown in FIG. Figure 3 As shown, step 103 includes:

[0068] In step 1031, an RGB signal to be transmitted is obtained.

[0069] In step 1032, the input signal corresponding to the RGB lamp point in the RGB to be transmitted is used as the input of the RGBW1W2 screen characteristic conversion matrix, and the output signal of the RGB lamp point is determined according to the output of the RGBW1W2 screen characteristic conversion matrix.

[0070] For example, the original RGB three-channel image data (RGB signal to be transmitted) is received from a video source (such as a GPU or an image sensor), and the GB three-channel image data is converted into a 5-channel sub-pixel output signal through the RGBW1W2 screen characteristic conversion matrix.

[0071] In step 104 , the color temperature is adjusted by adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2 .

[0072] For example, by changing the brightness ratio of the first white light sub-pixel W1 (usually cool white) and the second white light sub-pixel W2 (usually warm white), continuous color temperature adjustment from 2700K to 6500K is achieved.

[0073] Optionally, the method further includes:

[0074] While adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2 , the total spectral power distribution of each sub-pixel is maintained above 90.

[0075] Figure 4 FIG. 1 is a schematic structural diagram of a device for improving the color rendering index of an LED display screen according to an exemplary embodiment. Figure 4 As shown, the apparatus 400 includes:

[0076] The screen construction module 410 adds a first white light sub-pixel W1 and a second white light sub-pixel W2 to the RGB display unit of the LED display screen to form an RGBW1W2 screen;

[0077] The matrix acquisition module 420 is connected to the screen construction module 410, and obtains the brightness characteristics of each sub-pixel in the RGBW1W2 screen and constructs the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristics;

[0078] The output signal acquisition module 430 is connected to the matrix acquisition module 420 and acquires the output signal of each sub-pixel in the RGBW1W2 screen according to the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix;

[0079] The color temperature adjustment module 440 is connected to the output signal acquisition module 430 and realizes color temperature adjustment by adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2.

[0080] Figure 5 is based on Figure 4 A structural diagram of a matrix acquisition module is shown in FIG. Figure 5 As shown, the matrix acquisition module 420 includes:

[0081] The screen measurement unit 421 measures the luminance coordinate value of each sub-pixel of the RGBW1W2 screen when the grayscale value is 255, so as to determine the tristimulus value matrix of each sub-pixel according to the luminance coordinate value of each sub-pixel;

[0082] a luminance characteristic acquisition unit 422 connected to the screen measurement unit 421, and determining the luminance characteristics of the first white light sub-pixel W1 and the second white light sub-pixel W2 in the RGBW1W2 screen according to the tristimulus value matrix of each sub-pixel;

[0083] The conversion matrix acquisition unit 423 is connected to the brightness characteristic acquisition unit 422 and constructs the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristic.

[0084] Optionally, the device further includes:

[0085] While adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2 , the total spectral power distribution of each sub-pixel is maintained above 90.

[0086] Figure 6 is based on Figure 4 A schematic diagram of the structure of an output signal acquisition module is shown in FIG. Figure 6 As shown, the output signal acquisition module 430 includes:

[0087] The signal acquisition unit 431 to be transmitted acquires the RGB signal to be transmitted;

[0088] The output signal acquisition unit 432 is connected to the signal acquisition unit 431 to be transmitted, and uses the input signal corresponding to the RGB lamp point in the RGB to be transmitted as the input of the RGBW1W2 screen characteristic conversion matrix, and determines the output signal of the RGB lamp point according to the output of the RGBW1W2 screen characteristic conversion matrix.

[0089] In summary, the present invention discloses a method and apparatus for improving the color rendering index of an LED display screen. The method includes: adding a first white light sub-pixel W1 and a second white light sub-pixel W2 to the RGB display unit of the LED display screen to form an RGBW1W2 screen; obtaining the brightness characteristics of each sub-pixel in the RGBW1W2 screen, and constructing an RGBW1W2 screen characteristic conversion matrix based on the brightness characteristics; obtaining the output signal of each sub-pixel in the RGBW1W2 screen based on the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix; and adjusting the color temperature by adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2. By adding W1 and W2 to the RGB display screen, the screen color temperature can be accurately maintained while maintaining a high color rendering index. At the same time, this method can ensure the accuracy of the screen color temperature.

[0090] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0091] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0092] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for improving the color rendering index of an LED display, characterized in that: The method comprises: A first white light sub-pixel W1 and a second white light sub-pixel W2 are added to the RGB display unit of the LED display screen to form an RGBW1W2 screen; Obtaining the brightness characteristics of each sub-pixel in the RGBW1W2 screen, and constructing the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristics; Obtaining an output signal of each sub-pixel in the RGBW1W2 screen according to the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix; The color temperature is adjusted by adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2.

2. The method for improving the color rendering index of an LED display according to claim 1, wherein: The acquiring the brightness characteristics of each sub-pixel in the RGBW1W2 screen and constructing the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristics includes: Respectively measuring the luminance coordinate value of each sub-pixel of the RGBW1W2 screen when the grayscale value is 255, so as to determine the tristimulus value matrix of each sub-pixel according to the luminance coordinate value of each sub-pixel; Determine the brightness characteristics of the first white light sub-pixel W1 and the second white light sub-pixel W2 in the RGBW1W2 screen according to the tristimulus value matrix of each sub-pixel; The RGBW1W2 screen characteristic conversion matrix is ​​constructed according to the brightness characteristic.

3. The method for improving the color rendering index of an LED display according to claim 2, wherein: The brightness characteristic of the first white light sub-pixel W1 is ,in, , Represents the tristimulus value matrix of RGB light points, represents the tristimulus value matrix of W1; The brightness characteristic of the second white sub-pixel W2 is ,in , Represents the tristimulus value matrix of W2.

4. The method for improving the color rendering index of an LED display according to claim 3, wherein: The RGBW1W2 screen characteristic conversion matrix is: , where R, G, and B represent the output signals of the RGB light points respectively, r, g, and b represent the input signals corresponding to the RGB light points in the signal to be transmitted respectively, and p is the first conversion coefficient. , q is the second conversion coefficient, , , gamMax represents the maximum output value of the first white light sub-pixel W1 and the second white light sub-pixel W2 after gamma correction, and x and y represent the brightness coordinate values ​​of the sub-pixels when the grayscale value is 255.

5. The method for improving the color rendering index of an LED display according to claim 1, wherein: The method further comprises: While adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2, the total spectral power distribution of each sub-pixel is maintained above 90.

6. The method for improving the color rendering index of an LED display according to claim 1, wherein: The step of obtaining an output signal of each sub-pixel in the RGBW1W2 screen according to the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix includes: Get the RGB signal to be transmitted; The input signal corresponding to the RGB lamp point in the RGB to be transmitted is used as the input of the RGBW1W2 screen characteristic conversion matrix, and the output signal of the RGB lamp point is determined according to the output of the RGBW1W2 screen characteristic conversion matrix.

7. A device for improving the color rendering index of an LED display screen, characterized in that: The device comprises: The screen construction module adds a first white light sub-pixel W1 and a second white light sub-pixel W2 to the RGB display unit of the LED display screen to form an RGBW1W2 screen; a matrix acquisition module, connected to the screen construction module, for acquiring the brightness characteristics of each sub-pixel in the RGBW1W2 screen and constructing the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristics; An output signal acquisition module is connected to the matrix acquisition module and acquires the output signal of each sub-pixel in the RGBW1W2 screen according to the RGB signal to be transmitted and the RGBW1W2 screen characteristic conversion matrix; The color temperature adjustment module is connected to the output signal acquisition module, and realizes color temperature adjustment by adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2.

8. The device for improving the color rendering index of an LED display according to claim 7, characterized in that: The matrix acquisition module includes: a screen measurement unit for respectively measuring the luminance coordinate value of each sub-pixel of the RGBW1W2 screen when the grayscale value is 255, so as to determine a tristimulus value matrix of each sub-pixel according to the luminance coordinate value of each sub-pixel; a luminance characteristic acquisition unit connected to the screen measurement unit, and determining the luminance characteristics of the first white light sub-pixel W1 and the second white light sub-pixel W2 in the RGBW1W2 screen according to the tristimulus value matrix of each sub-pixel; The conversion matrix acquisition unit is connected to the brightness characteristic acquisition unit and constructs the RGBW1W2 screen characteristic conversion matrix according to the brightness characteristic.

9. The device for improving the color rendering index of an LED display according to claim 7, characterized in that: The device further comprises: While adjusting the output ratio of the first white light sub-pixel W1 and the second white light sub-pixel W2, the total spectral power distribution of each sub-pixel is maintained above 90.

10. The device for improving the color rendering index of an LED display according to claim 7, characterized in that: The output signal acquisition module includes: A signal acquisition unit to be transmitted, which acquires the RGB signal to be transmitted; An output signal acquisition unit is connected to the signal acquisition unit to be transmitted, and uses the input signal corresponding to the RGB lamp point in the RGB to be transmitted as the input of the RGBW1W2 screen characteristic conversion matrix, and determines the output signal of the RGB lamp point according to the output of the RGBW1W2 screen characteristic conversion matrix.

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