Sony tries to patent stylus with friction-based haptic feedback

There's a certain disconnected feeling that comes with using a touchscreen, and Sony isn't content with vibration being the sole standard for haptic feedback. The company has filed a bunch of patent applications for a stylus which instead uses artificially generated friction to make it harder or easier to move across the screen. It works using a "rolling contact ball gripping mechanism," which responds to instructions from the phone or tablet and employs actuators to increase or decrease frictio...