Small spacing LED display screen refers to the indoor LED display screen with LED point spacing less than 2.5mm, mainly including p2.0, p1.875, p1.923, p1.904, p1.875, p1.667 and other LED display products. With the improvement of LED display manufacturing technology, the resolution of traditional LED display has been greatly improved. The characteristics of small spacing LED are small screen point spacing and high resolution per unit area. It can display more high-definition graphics and video, also can display more video and image images, especially in the application of image splicing, can achieve seamless and arbitrary large-area splicing. Of course, in order to achieve the ideal display effect, the small spacing LED display can not do without the auxiliary role of the video processor.