LED display consists of LED dot matrix modules or pixel components. By the control of light-emitting diodes, it can show text,images and animations,etc.LED display integrates microelectronic technology,computer technology and information processing into the whole. Advanced modular scanning greatly improves the definition,the dynamic and the stability of images. It is becoming the new generation of display media with the most advantages such as its bright colors,wide dynamic range,high brightness,long service lifetime and stability. Currently,it has been widely used in large plaza,commercial advertisement,stadiums,information dissemination,securities trading,etc.It can satisfy all needs of different environments.