Quote:
Originally Posted by frostschutz
It needs to be there. You open the H2O by taking off the front bezel. It's just plastic but the Touch Screen no longer works without it. If you have water droplet detection enabled all you get is the "water on your screen?" message.
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What he calls "barriers" at 1:20 is actually the IR reflector? redirection? lens? shenanigans you can see these "barriers" are exactly the same glossy plastic material and it's see-through for IR. So these "barriers" reach into the device below the display and bring the IR to the top of the display somehow and that's why touch only works with this stuff and not with-out.
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Yes, an IR sensor is needed to detect the IR beam. How else could it work? The beam is detected at the other side of the display. If it is blocked then the unit knows you interrupted the beam with your finger. It will be interrupted both by a horizontal beam and a vertical beam. The intersection of those two beams represents the location of your finger. Read about touch screens in our wiki.
Dale