Diagram: Resistive (4-, 5-, 7- and 8-wire)

Resistive (4-, 5-, 7- and 8-wire)

Sensor Materials

Glass or Acrylic substrate, Spacer dots, Polyester sheet(s)

Principle of Operation

  • A touch compresses the flexible Top layer into contact with the bottom glass layer.
  • A voltage gradient is applied to the top and bottom layer (X and Y axis) sequentially.
  • The controller calculates the X and Y position of the touch based on the voltage gradient applied to one side and using the opposite side as a voltage probe.

Advantages

  • Most widely used touch technology
  • Can be activated by bare finger, gloved hand, or stylus
  • Low cost

Disadvantages

  • PET top sheet is highly susceptible to scratches, cuts and cigarette burns
  • PET layer is a flexing mechanical element coated with a conductive ceramic which wears with every flex
  • Transmission typically in 80% to 85%
  • Limited to 2 resolvable points; 3 or more resolvable points requires resistive matrix sensor