![]() ![]() It’s like an invisible laser harp that can also sense distance. With one of these sensors, you can add a 2D touch surface to anything. Scanning quickly among the IR lasers and noting which photodiodes receive a reflection can locate a few fingertips in a 2D space, which explained the interactive part of the floating display. Because the photodiodes have a limited angle over which they respond, they can be used to triangulate the distance of the finger above the display. The IR light hits your finger and bounces back to the photodiodes on the bar. The zForce sensors are essentially an array of IR lasers and photodiodes with some lenses that limit their field of view. What was doing the touch response in mid-air? I’m a sucker for sensors, so I started asking questions and left with a small box of prototype Neonode zForce AIR sensor sticks to take apart. ![]() But this display was interactive: you could touch the floating 2D projection as if it were actually there, and the software would respond. I don’t know much more - I didn’t get to bring home one of the fancy glass plates - but it looked pretty good. The display itself was a sort of focused Pepper’s Ghost illusion, reflected off of an expensive mirror made by Aska3D. NOTE: This software update is not applicable to the JBL BAR 9.1 China version.Every once in a while, you get your hands on a cool piece of hardware, and of course, it’s your first instinct to open it up and see how it works, right? Maybe see if it can be coaxed into doing just a little bit more than it says on the box? And so it was last Wednesday, when I was at the Embedded World trade fair, and stumbled on a cool touch display floating apparently in mid-air.
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