User manual

Resistive Touch Screen (Option)

General

The resistive TFT Touch Screen is constructed of a hard-coated polyester

topsheet that is overlaid on a conductively-coated glass layer. Voltage is

applied to the topsheet. As the user touches the screen, the topsheet com-

presses into contact with the glass layer, and current flows to the four cor-

ners in proportion to the distance from the edge. The controller then

calculates the position of the finger or stylus, based on the current flow. Be

cause the controller derives both the “X” and “Y” touch coordinates from

the stable glass layer, the accuracy and operation of the touchscreen is

unaffected by damage to the topsheet caused by extended use or neglect.

RESISTIVE TOUCH SCREEN (OPTION)