Capacitive Touch Screen

A capacitive touch screen is a control display that utilizes the electrical properties of the human body as input.

When a finger or a specialized input device such as a stylus touches the display, it detects when and where the user touches the display. As a result, capacitive displays can receive accurate input from very light touches.

How does a capacitive touchscreen work

Capacitive touchscreens consist of a thin layer of conductive material, such as copper or indium tin oxide ITO, printed on the underside of the insulating outer layer of the display. When a finger touches the screen, the contact point absorbs a small charge, effectively becoming a functional capacitor. The resulting change in the electrostatic field is then measured to pinpoint where the contact occurs.