触摸屏是计算机的输入设备，与能实现输入的键盘和能点击的鼠标不同，它能让用户通过触摸屏幕来进行选择。具有触摸屏的计算机的所需的储存空间不大，移动部分很少，而且能进行封装。触摸屏在使用起来 比键盘和鼠标更为直观，而且培训成本也很低。

　　所有的触摸屏有三类主要元件。处理用户的选择的传感器单元；和感知触摸并定位的控制器，以及由一个传送触摸信号到计算机操作系统的软件设备驱动。触摸屏传感器有五种技术：电阻技术、电容技术、红外线技术、声波技术或近场成像技术。-touch-screen computer input device, and can achieve input keyboard and mouse can click on different, it can allow users to touch the screen to make choices. With the touch screen of the computer storage space, few moving parts and can be packaged. Touchscreen in the use of over-the keyboard and mouse more intuitive, but the training cost is very low. All of the touch screen has three main components. Consumer choice of sensor modules; Perception and touch and positioning the controller and transmitted by touching a signal to the computer operating system software device drivers. Touchscreen technology sensors are five : resistance, capacitance technology, infrared, acoustic technology or near-field imaging technology.