Touch screen is also called “touch screen” or “touch panel”. It is an inductive liquid crystal display device that can receive input signals such as contacts. When it touches a graphic button on the screen, the touch screen The haptic feedback system can drive various linking devices according to pre-programmed programs, which can be used to replace mechanical button panels and create vivid video and audio effects through liquid crystal display screens. Touch screen is a newest computer input device. It is the simplest, most convenient and natural human-computer interaction method. It gives multimedia a new look and is an attractive new multimedia interactive device. Mainly used in public information query, leadership office, industrial control, military command, electronic games, a la carte, multi-media teaching, real estate pre-sale.