Capacitive touch

Touch-sensitive user interfaces have seen an enormous emergence in the last decade, no doubt influenced by the popularity of tablets and smartphones that use the same principle. A mere touch or swipe of the finger on the control panel is translated into an action, offering an intuitive user experience and making the technology fit for a wide range of applications in every sector and domain. The translucent panels offer a nearly limitless number of possibilities for backlighting, design and branding.

How it works

Capacitive sensing technology is based upon the constant monitoring of the electrical capacity of the touch area, which is changed by a human finger. As the human body is an electrical conductor, touching the surface of the screen results in a distortion of the screen’s electrostatic field. Depending on the location of the touch and the movement that is detected (swiping, tapping), a specific action will be triggered.

Typical applications

  • Home appliances
  • Automotive interiors
  • Vending machines
  • Wellness (whirlpools, saunas)
  • Medical devices
  • Communication and navigation devices
  • Light switches

A fully customized solution

Cover glass

  • Chemically or thermally tempered glass, Gorilla glass
  • Acrylic glass
  • Metal overlay

Transparent conductors

  • Uniform backlighting
  • Secret until lit functionality
  • Film embossing

Sensors

  • Capacitive keys, slider, wheel and proximity
  • PCAP touch sensor

Touch controllers

  • Keys, sliders, wheels, …
  • Water-proof
  • Use with gloves

Capacitive key sensor layout

  • Screen-printed on flexible film
  • Screen-printed directly on cover glass
  • Tracked on a PCB

Get inspired