What is the purpose of a digitizer in a mobile device?

What is the purpose of a digitizer in a mobile device?

  • to convert AC to DC
  • to convert analog video signals to digital ones
  • to convert digital music to analog for headphone delivery
  • to convert user touch actions to digital input signals
    Explanation:

    Digitizers are used in mobile device touchscreens. The digitizer converts user touch actions such as a swipe or tap into an input digital signal.