Stylus inputs for smartphones and tablets have become largely obsolete, with the exception of devices packing an integrated digitizer and active stylus, like Samsung's Note series and a few others. But some of us love our styli, as millions of cheap, plastic passive pens lining iPad accessory bargain bins across the country demonstrate. NVIDIA is hoping to boost the capability of passive stylus input on Tegra 4 hardware with its DirectStylus solution, a way for a standard capacitive touchscreen to more accurately emulate pen and paper.
DirectStylus works by using NVIDIA's Direct Touch 2.0 software to bump touch input scans up to 300 times a second, then applies some of Tegra's GPU power to interpret the results.
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NVIDIA Shows Off Tegra 4's DirectStylus Capability: Better Drawing And Notation Without A Digitizer [Update] was written by the awesome team at Android Police.