CN115691404A - Display method of multi-color-domain-mode LED display screen - Google Patents
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Abstract
The invention discloses a display method of a multi-color-domain-mode LED display screen, which is suitable for the LED display screen, wherein pixel points of the LED display screen comprise a red LED, a green LED, a cyan LED and a blue LED; the display method comprises the following steps: (1) Acquiring first video data, wherein the first video data comprises a red signal, a green signal and a blue signal of each pixel point; (2) Converting the first video data into second video data by using a corresponding mapping algorithm according to the color gamut mode, wherein the second video data comprises a red signal, a green signal, a cyan signal and a blue signal of each pixel point; and (3) displaying the second video data by the LED display screen. The LED display screen has a large color gamut display range, and can display more and richer colors; under the eye protection mode, the blue LED is replaced by the cyan LED to emit light, so that blue light with low wavelength is completely eradicated, and eye protection display in the true sense is realized.
Description
Technical Field
The invention relates to the technical field of LED display screens, in particular to a display method of a multi-color-domain mode LED display screen.
Background
The conventional LED color display is formed by mixing 3 primary colors of R (red), G (green), and B (blue). The single-color LED chip corresponding to each primary color is provided with a corresponding driving circuit, and the gray value can be independently lightened and controlled; the three primary colors can be mixed together to display various colors.
The existing LED display screen adopts a scheme of three primary colors of R, G and B, the difference between the area of a triangle formed by color coordinate points of the three primary colors of R, G and B and the area of a horseshoe chromaticity diagram is large, a large number of colors cannot be displayed, particularly, a cyan light part, and a large number of colors cannot be displayed through the display screen.
On the other hand, in a color spectrum formed by three primary colors of R, G, and B, except for a small amount of color coordinate points whose B component is 0, the other color coordinate points all contain blue light components with low wavelengths, which adversely affects the health of human eyes.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a display method of a multi-color-domain mode LED display screen according to the defects of the prior art, and solve the problems of small color domain and eye injury caused by blue light of the LED display screen.
The technical scheme of the invention is realized as follows:
a display method of a multi-color domain mode LED display screen is suitable for the LED display screen, and pixel points of the LED display screen comprise a red LED, a green LED, a cyan LED and a blue LED; the display method comprises the following steps:
(1) Acquiring first video data, wherein the first video data comprises a red signal, a green signal and a blue signal of each pixel point;
(2) Converting the first video data into second video data by using a corresponding mapping algorithm according to the color gamut mode, wherein the second video data comprises a red signal, a green signal, a cyan signal and a blue signal of each pixel point;
(3) And the LED display screen displays the second video data.
Further, the color gamut mode includes a standard color gamut mode, a high color gamut mode, and an eye protection mode.
Further, the mapping algorithm of the standard color gamut mode is: r1= r, g1= g, c1=0, b1= b;
wherein, r, g, b respectively represent the red gray value, green gray value, blue gray value of each pixel in the first video data, and r1, g1, c1, b1 respectively represent the red gray value, green gray value, cyan gray value, blue gray value of each pixel in the second video data.
Further, the mapping algorithm of the high gamut mode is: when r < b or r < g/x, if b ≧ g/x, r2= r, g2=0, c2= g (1 + x), b2= b-g x, if b < g/x, r2= r, g2= g-b/x, c2= b (1 + x)/x, b2=0; when r is greater than or equal to b and r is greater than or equal to g/x, then r2= r, g2= g, c2=0, b2= b;
r, g and b respectively represent red gray values, green gray values and blue gray values of all pixel points in the first video data, r2, g2, c2 and b2 respectively represent red gray values, green gray values, cyan gray values and blue gray values of all pixel points in the second video data, x = GC/CB, GC is a distance value between a chromaticity coordinate measured when green primary colors of the LED display screen are displayed and a chromaticity coordinate measured when cyan primary colors of the LED display screen are displayed, and CB is a distance value between the chromaticity coordinate measured when cyan primary colors of the LED display screen are displayed and a chromaticity coordinate measured when blue primary colors of the LED display screen are displayed.
Further, the mapping algorithm of the eye protection mode is as follows: r3= r, g3= g, c3= b, b3=0;
wherein r, g, b respectively represent the red gray value, green gray value, blue gray value of each pixel in the first video data, and r3, g3, c3, b3 respectively represent the red gray value, green gray value, cyan gray value, blue gray value of each pixel in the second video data.
Furthermore, the light-emitting center wavelength of the red LED is 600 to 680nm, the light-emitting center wavelength of the green LED is 520 to 550nm, the light-emitting center wavelength of the cyan LED is 480 to 500nm, and the light-emitting center wavelength of the blue LED is 440 to 470nm.
By adopting the technical scheme, the invention has the beneficial effects that: (1) The pixel points are composed of a red LED, a green LED, a cyan LED and a blue LED, so that the color gamut display range of the LED display screen is enlarged, and more and richer colors can be displayed; (2) In the eye protection mode, the blue LED is replaced by the cyan LED to emit light, so that blue light with low wavelength is completely eradicated, and eye protection display in the true sense is realized; (3) The mapping algorithm for converting the first video data into the second video data has small operand, low requirements on software and hardware, controllable newly-added cost and easy realization of commercial application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a color gamut range diagram of an LED display screen in a standard color gamut mode according to an embodiment.
Fig. 2 is a color gamut range diagram of the LED display screen in the high color gamut mode according to the embodiment.
Fig. 3 is a color gamut range diagram of the LED display screen in the eye-protecting mode according to the embodiment.
Detailed Description
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.
As shown in fig. 1 to 3, in the embodiments provided by the present invention, a display method of a multi-gamut mode LED display screen is suitable for an LED display screen, and pixel points of the LED display screen include a red LED, a green LED, a cyan LED, and a blue LED.
The display method comprises the following steps:
(1) Acquiring first video data, wherein the first video data comprises a red signal, a green signal and a blue signal of each pixel point;
(2) Converting the first video data into second video data by using a corresponding mapping algorithm according to the color gamut mode, wherein the second video data comprises a red signal, a green signal, a cyan signal and a blue signal of each pixel point;
(3) And the LED display screen displays the second video data.
In this embodiment, the color gamut modes include a standard color gamut mode, a high color gamut mode, and an eye protection mode.
As shown in fig. 1, the mapping algorithm of the standard color gamut mode is: r1= r, g1= g, c1=0, b1= b.
Wherein, r, g, b respectively represent the red gray value, green gray value, blue gray value of each pixel in the first video data, and r1, g1, c1, b1 respectively represent the red gray value, green gray value, cyan gray value, blue gray value of each pixel in the second video data.
As shown in fig. 2, the mapping algorithm for the high gamut mode is: when r < b or r < g/x, r2= r, g2=0, c2= g (1 + x), b2= b-g x if b ≧ g/x, r2= r, g2= g-b/x, c2= b (1 + x)/x, b2=0 if b < g/x; when r ≧ b and r ≧ g/x, then r2= r, g2= g, c2=0, b2= b.
R, g and b respectively represent red gray values, green gray values and blue gray values of all pixel points in the first video data, r2, g2, c2 and b2 respectively represent red gray values, green gray values, cyan gray values and blue gray values of all pixel points in the second video data, x = GC/CB, GC is a distance value between a chromaticity coordinate measured when green primary colors of the LED display screen are displayed and a chromaticity coordinate measured when cyan primary colors of the LED display screen are displayed, and CB is a distance value between the chromaticity coordinate measured when cyan primary colors of the LED display screen are displayed and a chromaticity coordinate measured when blue primary colors of the LED display screen are displayed.
As shown in fig. 3, the mapping algorithm of the eye protection mode is as follows: r3= r, g3= g, c3= b, b3=0.
Wherein, r, g, b respectively represent the red gray value, green gray value, blue gray value of each pixel in the first video data, and r3, g3, c3, b3 respectively represent the red gray value, green gray value, cyan gray value, blue gray value of each pixel in the second video data.
In this embodiment, the emission center wavelength of the red LED is 600 to 680nm, the emission center wavelength of the green LED is 520 to 550nm, the emission center wavelength of the cyan LED is 480 to 500nm, and the emission center wavelength of the blue LED is 440 to 470nm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A display method of a multi-color domain mode LED display screen is suitable for the LED display screen, and pixel points of the LED display screen comprise a red LED, a green LED, a cyan LED and a blue LED; the method is characterized by comprising the following steps:
(1) Acquiring first video data, wherein the first video data comprises a red signal, a green signal and a blue signal of each pixel point;
(2) Converting the first video data into second video data by using a corresponding mapping algorithm according to the color gamut mode, wherein the second video data comprises a red signal, a green signal, a cyan signal and a blue signal of each pixel point;
(3) And the LED display screen displays the second video data.
2. The method as claimed in claim 1, wherein the color gamut modes include a standard color gamut mode, a high color gamut mode, and an eye protection mode.
3. The method as claimed in claim 2, wherein the mapping algorithm of the standard color gamut mode is: r1= r, g1= g, c1=0, b1= b;
wherein r, g, b respectively represent the red gray value, green gray value, blue gray value of each pixel in the first video data, and r1, g1, c1, b1 respectively represent the red gray value, green gray value, cyan gray value, blue gray value of each pixel in the second video data.
4. The method as claimed in claim 2, wherein the mapping algorithm of the high gamut mode is: when r < b or r < g/x, if b ≧ g/x, r2= r, g2=0, c2= g (1 + x), b2= b-g x, if b < g/x, r2= r, g2= g-b/x, c2= b (1 + x)/x, b2=0; when r is greater than or equal to b and r is greater than or equal to g/x, then r2= r, g2= g, c2=0, b2= b;
wherein r, g and b respectively represent red gray scale values, green gray scale values and blue gray scale values of each pixel point in the first video data, r2, g2, c2 and b2 respectively represent red gray scale values, green gray scale values, cyan gray scale values and blue gray scale values of each pixel point in the second video data, x = GC/CB, GC is a distance value between a chromaticity coordinate measured when the green primary color of the LED display screen is displayed and a chromaticity coordinate measured when the cyan primary color of the LED display screen is displayed, and CB is a distance value between the chromaticity coordinate measured when the cyan primary color of the LED display screen is displayed and a chromaticity coordinate measured when the blue primary color of the LED display screen is displayed.
5. The method as claimed in claim 2, wherein the mapping algorithm of the eye protection mode is: r3= r, g3= g, c3= b, b3=0;
wherein, r, g, b respectively represent the red gray value, green gray value, blue gray value of each pixel in the first video data, and r3, g3, c3, b3 respectively represent the red gray value, green gray value, cyan gray value, blue gray value of each pixel in the second video data.
6. The method of claim 1, wherein the central wavelength of the red LED is 600 to 680nm, the central wavelength of the green LED is 520 to 550nm, the central wavelength of the cyan LED is 480 to 500nm, and the central wavelength of the blue LED is 440 to 470nm.
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