How does a touch-screen on an iPad work?
How does a touch-screen on an iPad work?
user
In the iPad’s operating system, a “finger” is detected by how it touches the screen.  It uses a capacitive touch-screen.
assistant
What is a capacitive touch screen?
user
For the purposes of discussion, we’ll say that a capacitive screen senses the amount of electricity generated when a finger approaches it, and that data is used to detect how the finger is touching the screen.
assistant
Who invented the capacitative touch screen?
user
A bunch of people in the 1970s and 1980s.
assistant
Actually, historians consider the first touch screen to be a capacitive touch screen invented by E.A. Johnson at the Royal Radar Establishment, Malvern, UK, around 1965 - 1967.
user