Touch screen, also known as touch screen and touch panel, is an inductive LCD device that can receive input signals such as contacts. When touching the graphic buttons on the screen, the tactile feedback system on the screen can drive various connecting devices according to the pre-programmed program, which can replace the mechanical button panel and use the LCD display screen system. Create vivid audio and video effects. Touch screen, as a new computer input device, is the simplest, convenient and natural way of human-computer interaction at present. It gives multimedia a brand-new look and is an attractive new multimedia interactive device. Mainly used in public information inquiry, leadership office, industrial control, military command, video games, singing and ordering, multimedia teaching, real estate pre-sale, etc.