The small pitch LED is characterized by a small dot pitch and a high resolution per unit area. It can display higher definition graphic images and videos, as well as display more video and image images, especially in image stitching, which can be seamless and arbitrarily large-area stitching. A small-pitch LED display can't do without the auxiliary function of the video processor in order to achieve the desired display effect. With the improvement of LED display manufacturing technology, the resolution of traditional LED display has been greatly improved.