[identity profile] ninjarat.livejournal.com 2016-03-18 02:57 pm (UTC)(link)
A couple of the e-Ink readers I own have stylus input but... they suck, quite frankly. You need a high sensitivity digitizing grid and a lot of processing power to run it in order to capture input like that in close enough to real time that it doesn't look like an Etch-a-Sketch. I own a Tegra Note 7 which when new a year and a half ago was one of the most powerful 7" tablets around, and it has a capacitive stylus and a processor core dedicated to stylus input. It's okay for taking notes but it fails when it comes to dashing off autographs.

[identity profile] ninjarat.livejournal.com 2016-03-18 04:01 pm (UTC)(link)
Now that I've had a chance to consider what I wrote I think that capturing autographs and signatures directly on reader devices might not be the right way to do it. Does it make sense to you to sign a copy of the title page or frontispiece, photograph it with the device's camera, and attach that image to the book somehow?