By Jessica Leber, Technology Review
Touch screens are ubiquitous, but they are often hard to type on because they provide no tactile feedback. Tactus Technology, a startup in Fremont, California, is prototyping touch-screen hardware with buttons that emerge when you need the feel of a physical keyboard and disappear when you don’t. The approach, in which a fluid-filled plastic panel and cylindrical fluid reservoir replace the usual top layer of glass, is among a crop of emerging technologies aimed at adding tactile feedback to make screens feel like old-fashioned keyboards.
http://www.technologyreview.com/demo/508106/a-shape-shifting-smartphone-touch-screen/
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