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Pufixas

How does "Floating Touch" work on Galaxy S4?

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I'm really curious about technology behind the "Floating Touch" feature for Galaxy S4. For those who haven't heard about it, essentially what it does, is lets the device know when the finger is near the screen with, but not touching. You can see it in this video example: http://www.youtube.com/watch?v=o78I5Y52BTI

The only thing I can think of some kind of high conductivity touch panel, which is very sensitive to any electrical impulses. Also, you can use your gloves with this phone. I think it's pretty damn amazing.

So what do you think? Maybe you have some links to articles about the tech behind all this, I would like to read about it.

 

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 It already exists on several devices.

 

There are several articles out for it, like this one about Sony's Sola.  I expect the S4 does something similar.

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sensitive capacative surface sounds about right.

It's not that hard to build a basic single point "touch sensor" from some metal foil and an a/d-converter that will react long before you actually touch it.

I'd imagine the hard part would be to filter out unwanted signals and get resolution and reliability up.

 

I've also seen this done with a desk-sized screen with cameras behind a back-projected screen interpreting the shadows of your hand.

This screen, which we ported some of our games for to make this demo: http://www.youtube.com/watch?v=RljkmXP-JX4 smile.png

(though we don't use the near touch feature in our demo)

Edited by Olof Hedman
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