ROLLER KEY USER INTERFACE

摘要

A user interface has at least two roller keys. In an embodiment, the user interface includes a first roller (503) supported on a first axle (501) and a second roller (513) supported on a second axle (511). There may be a belt (521) wrapped around the first roller (503) and the second roller (513). The belt (521) has an underside (553), which contacts and actuates keyswitch (551) when a finger presses downward. A rotation sensor array (515) measures the rotation of the first roller (503).