Nvidia shows off software-based pressure sensitive display

Nvidia shows off software-based pressure sensitive display

It seems that you will no longer need a specialized stylus like the
Galaxy Note 2’s S Pen to etch out a sketch on your smartphone.

Nvidia CEO Jen-Hsun Huang writes his name in Mandarin.
Are you one of those who love drawing on a smartphone but bemoan the
fact that you need a Galaxy Note 2 to get the precise strokes required
for your masterpiece?
Well, the good news is that Nvidia’s CEO Jen-Hsun Huang showed off a
software-based pressure sensitive display powered by the company’s Tegra
4 chipset, and he was using a normal non-digitizer stylus to draw on
it.
The trick behind the tech lies in Nvidia’s Prism display, introduced
with the Tegra 3. Prism basically reads the screen and optimizes pixels
and brightness to save battery life. For the Tegra 4, Nvidia uses the
same technique to detect how an ordinary capacitive stylus interacts
with the screen.
The software is able to sense how much the stylus’ head is pressing
down on the display at the point of writing and adjusts the stroke sizes
accordingly. Huang also flipped the stylus around to erase what he
wrote, and because the stylus had a specific thickness at that end, it’s
able to “know” that it should be erasing.
Nvidia also said that the software will be made available to all
Tegra 4 devices — this means you don’t need the Wacom-powered S Pen or
similar styli for drawing. 

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