How does an Multitouch overlay works?

i'm a electronics enthusiast and would like to find out the technology behind such stuff.
they both say it works bad its probably Infrared based...
I was wondering if it is with some IR Leds and phototransistors or some kind?

Yes those systems are using IR LEDs and receivers. This will give you a better overview of how it works.

oinquer (author) 4 years ago
thank you for your time, i was looking at a paper from an university that was explaining almost the same process.

so this seems a really trivial tecnology...ideas