Capacitive Touch Screens And Resistive touch Screens

Capacitive touch screen: 

The capacitive touch screen is made up of a glass panel that is coated with a material.



The property of this material is that it can store electrical charge. So the capacitive touchscreens basically stores electrical charge.
But for good, Human body can also store charge. So, when you touch this screen with your finger, some of these charges on the screen gets transferred to your finger. The oscillator circuits located at the corner of your system will then sense this decrease in the charge on screen and the spot the exact location where touch occurred, and then transfers this specified information to the touchscreen driver software.

  

Resistive touch screen: 

Resistive touch screen, on the other hand is again made up of normal glass panel. However, this glass panel in this case is coated with three layers.
Two of these layers being conductive and resistive are kept apart using spacers while the third scratch-resistant layer covers the whole setup
When the resistive touch screen system is running, current flows through these layers. On a finger touch, the two layers get connected and change in electrical field occurs. The system calculates the coordinates of point of contact and passes them to touch screen driver software.