How Do Touchscreens Work?
A touch screen is a computer device that changes its state when a user touches it. The touchscreen relies on electrical current to determine where the touch is made. The screen is made of a layer of glass and an electrically conducting material called indium tin oxide. A thin layer of this material is connected to a low voltage, causing a tiny electrical charge to flow across the screen. The electric current is small enough not to cause a shock, but it is powerful enough to register an impression of pressure.
