Patent: a precise capacitive stylus for iPhone and iPad

A little over a year after their first appearance , we found a patent application from Apple for a stylus for touch screen. Apple uses capacitive technology for its screen, which measures the transfer of electric charges in a matrix screen to detect finger touch. If you want to use a stylus on the screen, it must be the driver - it can transmit loads (try to use a battery as a stylus, you'll be surprised).....more