touch screen lcd displays.With the popularity of computer technology in the 20 century 90 early years, the emergence of a new human-computer interaction technology - touch screen technology. With this technology, users can easily operate the host computer by simply touching the icon or text on the computer display screen with their fingers. This eliminates keyboard and mouse operations and makes human-computer interaction more straightforward. Therefore, touch screen technology has become the easiest input device for man-machine communication. It gives multimedia a new look and is a very attractive new multimedia interactive device.??A latest computer input device is the simplest, most convenient and natural way of human-computer interaction. It gives multimedia a new look and is a very attractive new multimedia interactive device. With the increase of multimedia information query, system designers have increasingly talked about the many advantages of touch screens such as ruggedness, fast response time, space saving, and easy communication. The application scope of touch screen in China is very broad, mainly for public information inquiry: business inquiry of telecommunication bureau, tax bureau, bank, electric power and other departments; information inquiry of city streets; information inquiry of museums and art galleries; flights at airport stations , Train query; In addition, it is used for leadership office, industrial control, military command, video games, song and order, multimedia teaching, real estate pre-sale, air ticket / train ticket pre-sale, etc. In the future, touch screens will enter the home. With the development of cities towards informatization and the penetration of computer networks in national life, information queries are all in the form of touch screens??the display content can be touched. The basic principle of touch screens is to touch the touch screen installed on the front of the display with a finger or other object. The touched position (in the form of coordinates) is detected by the touch screen controller and sent to the CPU through an interface (such as an RS-232 serial port) . Thereby determining the information entered. IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.