# Technical Principle Analysis of LED Display Screen

Principle of virtual pixel displayThe virtual pixel LED display uses software algorithm to control the light-emitting tube and make the light-emitting tube participate in the imaging of multiple adjacent pixels. The virtual screen uses fewer light tubes to achieve greater resolution, which can improve the pixel resolution of LED display by 4 times.Definition of virtual pixel display

The red, green and blue display components of each point in the display unit are evenly distributed to match the color mixing effect of pixels; The representation color of virtual display points is composed of adjacent red, green and blue pixels. The points of virtual pixels are scattered, and the points of real pixels are condensed. The luminous point of the virtual pixel is between the lamps, and the luminous point of the real pixel is on the lamps.Implementation method of virtual pixel

If the module is designed according to 2 red, 1 green and 1 blue, the conversion relationship between real point and virtual point is: M = 2m-1, M is the virtual point and N is the real point. For example, when m = 3, the real pixel is 3 & times; 5 dot matrix, virtual pixels are 5 & times; 9 dot matrix. Thus, we can get that if n is the number of row LED tubes and M is the number of column LED tubes, the pixel points displayed in real pixels are M & times; n. The pixels displayed by the virtual pixel are (2n-1) & times; (2m-1), so that when m and N are large enough, they are about 2n 2m, i.e. 4m n. So it's four times the real pixel.

Fig. 1 implementation principle of virtual pixelFigure 2 module of virtual pixel display screenAnalyzing the module in Figure 2, take the green light as an example, there are 16 lights in the row and 8 lights in the column. Therefore, the actual point pixel is 16 8 Because the virtual pixel technology is adopted, the actual number of pixels is (16) 2 8 2) , that is, a fourfold increase.

Analysis on the implementation process of LED display virtual technologyFigure 4   LED display virtual technology display process

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