Resistive
A resistive touchscreen panel is composed of several layers, the most important of which are two thin, metallic, electrically conductive layers separated by a narrow gap. When an object, such as a finger, presses down on a point on the panel’s outer surface the two metallic layers become connected at that point. This causes a change in the electrical current which is registered as a touch event and sent to the controller for processing.
Capacitive
A capacitive touchscreen panel consists of an insulator such as glass and coated with a transparent conductor. As the human body is also a conductor, touching the surface of the screen results in a distortion of the body’s electrostatic field, measurable as a change in capacitance.
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