How to match the small-pitch LED large-screen splicing device? Compared with the traditional LED large-screen display technology, the small-pitch LED large screen has the advantages of longer service life, better display effect, true seamless splicing, energy saving, environmental protection and low noise, but the biggest difference is actually reflected in its box. In terms of body composition, the traditional DLP or LCD splicing display units have standard resolution input support, while the small-pitch LED large screens are mostly non-standard resolutions; the other difference is that the traditional large-screen display units are mostly in size and resolution. The small-pitch LED large-screen unit takes into account the smoothness of arc splicing and the limitation of dot pitch. The unit box size is small and the resolution is small. Its splicing composition should cooperate with the sending card and the receiving card to achieve the final Display, and the connection between the sending card and the front-end image processor is mostly not corresponding to the standard resolution; a key application of the splicer is to output multiple DVI signals to splice and display multiple display screens arranged in a matrix. Become a logically complete display area. For small-pitch LED large screens, we can regard the display area driven by an LED controller (sending card) as an independent large LED screen. The current LED controllers mostly use DVI as the signal input interface to support The maximum input resolution is 1920×1200, then the maximum physical resolution of the driven LED display is 1920×1200. As the display area of small-pitch LED large-screen products becomes larger and larger, there are more and more projects of tens of square meters. The physical resolution of large LED screens often exceeds 1920×1200, so they are basically composed of multiple independent display areas driven by multiple LED controllers. For the splicer, it needs to correspond to the number of LED controllers, provide a corresponding number of DVI output ports, and perform splicing display on the entire large LED screen. In addition to the traditional technical problems of the splicer's upper screen, the front-end splicer of the small-pitch LED large screen must solve three problems:

     1. The output resolution can be customized to cope with the irregular physical resolution of the large LED screen.

    We all know that the small-pitch LED large screen is composed of display unit cabinets one by one in a matrix form, and the size and physical resolution of each display unit are fixed, but the entire large screen combined together is often not one. The standard physical resolution, for example: the physical resolution of the display unit is 128×144, which can only be stitched into 1920×1152, and the standard resolution of 1920×1080 cannot be stitched together. Usually in a large-scale splicing system, most of the large LED screen area driven by each LED controller is not standard resolution. At this time, it is particularly important for the front-end splicing device to have a non-standard resolution output, which can help us quickly find Appropriate splicing methods, reasonable allocation of resources, effectively saving the number of LED controllers and transmission equipment used, increasing the stability and reliability of the system, while ensuring the best display effect.

    2. It is necessary to ensure the synchronization of the output, avoid the phenomenon of asynchrony in the splicing picture, and ensure that the display is not torn.

   The multi-channel DVI output signal of the splicer must have the synchronization problem of the signal. The asynchronous DVI output signal is output to the large LED screen, and the picture tearing phenomenon will inevitably occur at the picture splicing, especially when playing fast moving images. obvious. How to ensure the output synchronization of the signal becomes the key to measuring the success or failure of the splicer system.

   Third, it is necessary to adopt more high-quality image processing algorithms, so that the zoomed image is conducive to transmission and maintains high definition.

    As we all know, the point-to-point image display effect is the best. If the reduced image only uses ordinary image processing technology or ordinary image processing algorithm, the brightness of the image will decrease, the edge of the image will appear jagged or even the pixel is missing. . Faced with the stringent requirements of small-pitch LED displays for display effects, it is obvious that high-end image processing chips and complex optimized image processing algorithms must be used to ensure that the processed images maintain the best display effect. Therefore, good The image processing algorithm is one of the keys to the application of the image splicer to the small-pitch LED large screen.