A tablet computer, also called a portable computer, is a small, portable personal computer with a touch screen as the basic input device. It has a touchscreen (also known as tablet technology) that allows users to work with a stylus or digital pen instead of a traditional keyboard or mouse. Users can input via built-in handwriting recognition, an on-screen soft keyboard, voice recognition, or a real keyboard (if the model is equipped). The touch screen is an inductive liquid crystal display device that can receive input signals such as contacts. When the graphic buttons on the screen are touched, the tactile feedback system on the screen can drive various linking devices according to pre-programmed programs, which can be used to replace mechanical button panel, and create vivid audio-visual effects through the liquid crystal display screen. As a newest computer input device, touch screen is a simple, convenient and natural way of human-computer interaction. It gives multimedia a new look and is a very attractive new multimedia interactive device. Mainly used in public information query, industrial control, military command, video games, multimedia teaching, etc. Touch screen technology is the most acceptable computer input method for ordinary people after keyboard, mouse, tablet and voice input. Using this technology, the user can operate the host by lightly touching the icons or characters on the computer display screen with his finger, thus making the human-computer interaction more straightforward. This technology greatly facilitates users and is a very attractive new multimedia interactive device.