Touch screen technology can be arcane, if you ever stop to think, what really makes the screen to find a pen or pencil finger. Advances in technology, touch screens are becoming more popular because the interface is intuitive and interesting people, new devices of modern technology. The first is a test that uses electricity and resistant sheet to cover the glass panel. There is also a scratch protection layer covering the metal layer to keep the display is very easy to destroy. When a user touches the screen, the two layers are forced to touch on this site. The capacitive system is built in layers, which owns the right of the electrical charge on the top of the glass panel. When a finger touches the screen to pay for a finger. surface acoustic system uses a pair of sensors placed on the edge of the cup.

When a finger touches the screen, the electrical signal is interrupted and the use of two lines of the computer can calculate the surface.

Unlike the resistive system, which transfers about 75 percent of monitors are lightweight and capacitive sends about 90 percent for improved picture quality over the resistive system.