Resistive technology

A resistive touch screen consists of two surfaces facing one another. The facing sides are coated in a conductive coating (ITO). They are separated from one another using small spacer dots. The two surfaces can either be foil on both sides or foil on one side and glass on the other. The touch screen has measuring leads with a defined resistance. When the surface is pressed, a connection is created at the touched point between the horizontal and vertical leads.
The controller interpolates the position of the input using the resulting total resistance.

 

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The 5-wire technology used most frequently in industrial applications reacts to the pressure on the screen at the touch point, like all resistive touch technologies. Resistive touch screens can be operated directly with your fingers, while wearing gloves, with a (touch) stylus, etc. Thick tools (screwdrivers, etc.) should not be used. The following criteria are some reasons for choosing PCAP technology:

 

 

 

Advantages:

  • Requires a defined pressure from a finger
    or suitable object
  • Suitable for medical applications, since they
    can be operated with gloves or prostheses
  • Inexpensive to produce
  • High resolution
  • High precision
  • Can be used in wet rooms
  • Broad temperature range, can also be used
    in below zero temperatures

Disadvantages:

  • Not multi-touch capable
    (or only to a restricted extent) (two-touch)
  • Operating layer is stretchable polyester, which is sensitive to damage and wear, including from abrasive cleaning agents and sponges
  • Opacity restricted at only 70 - 80%
    (appears slightly milky or cloudy)
  • Can be difficult to read due to ambient light
  • Only low resistance to many chemicals

Available sizes for resistive touch technology:

  • 3.5 zoll to 26 zoll

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