We all use mobiles everyday, almost continuously. And we
Capacitive touch screen actually consist of 3 different layers or screens.
In the next image we can see that when we bring our finger (any conductor) close to the 1st layer, the field generated by the 2nd layer is disrupted. This in turn causes a change in capacitance at that point (since capacitance is directly related to the voltage at the point). After that come the use of the 3rd layer which senses the position of the variation in capacitance and sends corresponding data to the processor to process further.
Even capacitive touch screens are of 2 types, but their main 3 layers still remain the same, even if they work differently. The 2 types are:
The main difference between them is that surface capacitive uses sensors at the corners of the screen to find out where you have clicked and a thin evenly distributed film across the surface (as pictured above) whereas projective capacitive uses a grid of rows and columns with a separate chip for sensing the position.
That’s It!! I hope you guys understood and I also hope I helped you bust this ‘magic’ phenomenon!