Originally Posted by Cris
Resistive Touch Screens: A small electrical current of 4-6 volts DC at less than 60 milliampsMa) is passed through the metallic-coated layers. When
pressure is applied to the surface, the separator dots allow the two charged surfaces to make contact. The
resultant signal is then sent to our controller which determines the exact point of contact and registers the
"touch" as a mouse would register a "click".
Capacitive Touch Screens: an all-glass touch screen with a transparent metallic conductive coating.An electrode pattern printed along the edges which distributes a low voltage field over the conductive layer. When a finger touches the screen and draws a minute amount of current to the point of contact, creating a voltage drop. The current flow from each corner is proportional to the distance to the touch point.
The X/Y location of the point of contact is calculated by the controller and transmitted to the computer.