Touch Screen

[dibble1]

I'm sure it's been asked a thousand times before but I'll ask anyway as I don't know. How does a modern touchscreen appliance (phone, I-pad etc) work? Is the screen heat sensitive, I'm sure it can't be pressure, Any simple explanations please?

[Togo]

Capacitance.

[Togo]

http://www.mobileburn.com/definition.jsp?term=capacitive+touchscreen

[gingejbee]

There are several different types........

http://www.explainthatstuff.com/touchscreens.html

[Togo]

Some are of Resistive method but Capacitive is generally accepted as the format.

[Togo]

http://www.mobileburn.com/definition.jsp?term=capacitive+touchscreen

[Togo]

Just a little info Dibble. A capacitor is a device widely used in electronics that holds a charge or potential between two terminals or fixed points. It can add this stored charge or potential to a circuit or take a potential from a supply or circuit and store it for later use. All this happens at a phenomenally fast rate in reality and has to be mentally slowed down to understand it. I have now had a chance to find a pretty good description of a capacitor and distinctly thinking it was witchcraft when being taught electronics in the late 60s.

https://electronics.howstuffworks.com/capacitor.htm

[Togo]

Your body or in the case of a touch screen of course holds a small charge or electrical potential which is used to operate the screens. Think static for instance. That is why they do not work with gloves on, except for gloves that do not insulate you from the screen.

[dibble1]

Thanks all